Sunday, March 1, 2015

Strength of Materials - MCQs Part V - Answers

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Answers in Strength of Materials - MCQs Part 5

Below are the answers key for the Multiple Choice Questions in Strength of Materials Part 5.

201. Unit lateral deformation to the unit longitudinal deformation

202. Buckle

203. 50 kn.

204. 141.62 kn.m

205. None of the above

206. Equilibrium

207. 1.95 mm

208. 900

209. 5.046 mm.

210. Poisson’s ratio

211. Fourth power

212. The integral of y2Da

213. Proportional to the displacement

214. Where the shearing stress is zero

215. Unit lateral deformation to the unit longitudinal deformation

216. None in the list

217. 681816 N

218. None in the list

219. 21300 KN

220. 285 kn/m

221. Elastic range

222. Full sine wave

223. Divided by the maximum allowable bending stress

224. Length of the column

225. 228000 N

226. 49 kn/m

227. 33.7 mpa

228. 165 mpa

229. 30 x 109 mm4

230. 267 kn/m2

231. 100 MPa

232. 432 KN

233. 3.70 m

234. 3.0 m

235. 202.5 N-m 

236.  190 x 106 mm4

237. 0.21 l

238. 3.95 m

239. 0.23 L

240. 2700/EI

241. Pab/L

242. 31.56 mm

243. 202.5 N-m

244. All of the three

245. 88419 MPa

246. 3 normal stresses + 3 shearing stresses

247. 4.22 m.

248. 880 N/mm

249. None in the list

250. Web neutral axis

Online Questions and Answers in Strength of Materials Series

Following is the list of practice exam test questions in this brand new series:

Strength of Materials MCQs
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III

Complete List of MCQs in General Engineering and Applied Sciences per topic


Published by: Froyd Wess06:00

Strength of Materials - MCQs Part V

Filed under:

MCQs in Strength of Materials Part 5

This is the Multiples Choice Questions Part 5 of the Series in Strength of Materials as one of the General Engineering and Applied Sciences (GEAS) topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including past Board Questions in General Engineering and Applied Sciences (GEAS) field.

Online Questions and Answers in Strength of Materials Series

Following is the list of multiple choice questions in this brand new series:

Strength of Materials MCQs
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III

Continue Practice Exam Test Questions Part V of the Series

201. Poisson’s ratio is the ratio of the

  • A. Unit lateral deformation to the unit longitudinal deformation
  • B. Unit stress to unit strain
  • C. Elastic limit to portion limit
  • D. Shear strain to compressive strain

202. Large deformation of a structural member bending out of line because of large and critical loads:

  • A. Buckle
  • B. Instability
  • C. Plastic deformation
  • D. All of the above

203. A propped cantilever beam (a beam fixed at one end and simple supported at the other end) is subject to a uniform load of 10 kN/m and a concentrated load of 40 kN at midspan. Determine the reaction at the simple support if the span is 10 m.

  • A. 50 kn.
  • B. 60 kn
  • C. 70 kn
  • D. 80 kn

204. A truck is moving along 20 m. Span of beam. The front axle load is 8 kN, the middle load is spaced at 3 m from the front and 6 m from the rear. Determine the max. Moment produced  by the load.

  • A. 142.62 kn.m
  • B. 153.54 kn.m
  • C. 141.62 kn.m
  • D. 234.45 kn.m

205. A tee section is made up of a 30 x 150 mm flange and a 30 mm x mm web. The neutral axis above the lowest fibers of the section is :

  • A. 155 mm
  • B. 35 mm
  • C. 160 mm
  • D. None of the above

206. The sum of all forces in the orthogonal directions and sum of all moments about any point are zero:

  • A. Buckling load
  • B. Compatibility
  • C. Equilibrium
  • D. Stability

207. A mild steel column is hollow and circular in cross section with an external diameter of 350 mm and internal diameter of 300 mm. It carries a compressive load of 200 KN. The shortening of the column if its initial height is 5 m and E = 200000 n/mm2.

  • A. 78.4 n/mm2
  • B. -0.00039
  • C. 1.95 mm
  • D. None on the list

208. Find the constant of 81 hp in a 3 inches cold rolled line shafting which transmitted 210 RMP.

  • A. 900
  • B. 600
  • C. 800
  • D. 500

209. A steel wire 10 m. long , hanging vertically supports a tensile load of 1000 N. Neglecting the weight of the wire, determine the required diameter if the elongation is not to exceed 2.5 mm. Assume E = 200 GPa.

  • A. 5.046 mm.
  • B. 3.596 mm.
  • C. 4.297 mm.
  • D. 6.382 mm.

210. The ratio of the lateral expansion to the longitudinal shortening of a concrete cylinder when subjected to compressive load.

  • A. Modulus of elasticity
  • B. Poisson’s ratio
  • C. Modulus of rupture
  • D. None of the above

211. The moment of inertia of any plane figure can be expressed in units of length to the:

  • A. First power
  • B. Second power
  • C. Third power
  • D. Fourth power

212. The moment of inertia about the principal x – x-axis of a cross section is:

  • A. The integral of y2Da
  • B. The integral of xda
  • C. The integral of x2Da
  • D. The integral of xyda

213. The stress in an elastic material is:

  • A. Inversely proportional to the materials yield strength
  • B. Inversely proportional to the force acting
  • C. Proportional to the displacement
  • D. Inversely proportional to the strain

214. Principal stresses occur on those planes:

  • A. Where the shearing stress is zero
  • B. Which are 45° Apart
  • C. Where the shearing stress in minimum
  • D. Which are subjected to pure tension

215. Poisson’s ratio is the ratio of the:

  • A. Unit lateral deformation to the unit longitudinal deformation
  • B. Unit stress to unit strain
  • C. Elastic limit to proportional limit
  • D. Shear to compressive strain

216. 66. A mild steel column is hollow and circular in cross section with an external diameter of 350 mm and internal diameter of 300 mm. It carries a compressive load of 200 KN. The shortening of the column if its initial height is 5 m and E = 200000 N/mm2.

  • A. 19.60 mm.
  • B. 19.60 cm
  • C. 19.30 in.
  • D. None in the list

217. A t-beam made up of a flange and a web, from 2 plates 20 x 200 mm joined together to from a T, is subjected to a tensile force P whose line of the flange of the T section. The centroid of the flange of the T section. The centroid is 65 mm from the tip, the moment of inertia is 37.7 x 106 mm. The maximum normal stress is limited to 150 n/mm2.

  • A. 5000000 N
  • B. None in the list
  • C. 14252136546n
  • D. 681816 N

218. A bar of metal 2 mm in diameter is tested on a length of 250 mm. In tension the following result were recorded:

Load KN                10.4              31.2

Extension mm        0.036          0.089

The young modulus E is nearly:

  • A. 80700n/mm2
  • B. 2154465n/mm2
  • C. 21654024n/mm2
  • D. None in the list

Answer: d.

219. A beam has the cross section 300 mm by 900mm. It is subjected to a normal tensile force P whose line of action passes 100 mm above the centrion. Calculate the maximum allowable value of P if the maximum direct stress is limited to ±150 N/mm2.

  • A. 2451354 KN
  • B. 21648 KN
  • C. 10224 KN
  • D. 21300 KN

220. The stress flow, Q of a beam 0.25 m x 50 m in section that is subjected to a shear of 95 KN is:

  • A. 526 KN
  • B. None in the list
  • C. 258 kn/m
  • D. 285 kn/m

221. The inertia portion of the stress-strain diagram of a steel is known as the:

  • A. Elastic range
  • B. Strain hardening
  • C. Plastic range
  • D. Modulus of elongation

222. If a member is not restrained against sway, and has hinged ends, and the critical load is reached, this member will buckle laterally turning into the shape of;

  • A. S-curve
  • B. Full sine wave
  • C. Half sine wave
  • D. Not in the list

223. To determine the required section modulus S, the minimum M max should be:

  • A. Multiplied by the maximum allowable bending stress
  • B. Divided by the maximum allowable bending stress
  • C. None in the list
  • D. Divided by the modulus of elasticity e and moment of inertia

224. In a long column, (slenderness ratio > 160) which of the following has the greatest influence on its tendency to buckle under a compressive load:

  • A. Modulus of elasticity
  • B. Radius of gyration of the column
  • C. Length of the column
  • D. Compressive strength of the material

225. The allowable load in shear for an 8.5 mm weld having an allowable shearing of 124 MPa for a total length of 306 mm is about:

  • A. None in the list
  • B. 1054 N
  • C. 228000 N
  • D. 745 N

226. The max. Moment of a beam with span 7 m. carrying a uniform load of 12 kn/m with both ends fixed is equal to

  • A. 49 kn/m
  • B. 62 kn/m
  • C. 32 kn/m
  • D. 86 kn/m

227. A steel column has the following properties: modulus of elasticity E = 200000 MPa, yield strength Fy = 200 MPa, length l = 12 m. Moment of inertia I = 37.7 x 106 mm4 area = 8000 mm2. The allowable stress is closest to:

  • A. 120 mpa
  • B. 67.4 mpa
  • C. 33.7 mpa
  • D. 91.1 mpa

228. A steel wide flange beam is laterally supported. The width of the web if the beam is 700 mm and web thickness is 10 mm, if Fy is equal to 250 MPa, the allowable bending stress is:

  • A. 180 mpa
  • B. 150 mpa
  • C. 165 mpa
  • D. 200 mpa

229. The moment of inertia of a trapezoid with base b = 600 mm and top a = 400 mm and depth d = 900 mm is nearest to:

  • A. 50 x 109 mm4
  • B. 400 x 109 mm4
  • C. 60 x 109 mm4
  • D. 30 x 109 mm4

230. A rectangular footing 2 m by 1.5 m carries a vertical load of 500 KN and moment of 100 KN-m in the longer direction of the footing. What is the maximum soil pressure under the footing?

  • A. 353 kn/m2
  • B. 3000 psf
  • C. 267 kn/m2
  • D. 533 kn/m2

231. A strip of steel 1 mm thick is bent into an area of a circle radius 1.0 m E is equal to 200 GPa. The maximum bending stress is:

  • A. 100 MPa
  • B. 50 MPa
  • C. 200 MPa
  • D. None in the list

232. The shear capacity v if a steel wide flange section , 600 mm deep whose web is 9 mm thick , is closest to : (assume Fy = 200 MPa)

  • A. 486 KN
  • B. 864 KN
  • C. 432 KN
  • D. 684 KN

233. A flat bar 50 mm by 6 mm in cross section is bent by a couple such that the maximum stress in the section is 162 MPa. If the modulus of elasticity of the material is 200000 N/mm2, the radius of curvature of the bar is:

  • A. 370 m
  • B. 37 m
  • C. 3.70 m
  • D. 3700m

234. The structural I-beam supporting a floor carries a floor load of 4.6 kN/m2. The beams span 6.0 m and are simply supported at their ends. Determine the center line spring if their ends. Determine the center line spring if the allowable stress in the beam is 120 Mpa and the section modulus is 534 x 103 mm3 .

  • A. 3.75 m
  • B. 3.45 m
  • C. 4.0 m
  • D. 3.0 m

235. A flat steel bar is 75 mm wide, 9 mm thick, and 1.2 m long. It is bent by two equal couples applied at the ends such that the midpoint deflection is 40 mm. Determine the magnitude of the couples. Assume E = 200000 MPa.

  • A. 2001 N-m
  • B. 1414 N-m
  • C. 202.5 N-m
  • D. 707.6 kN-m

236. A rectangular section has a moment of inertia Ix = 300 x 106 mm4 and Iy = 80 x 106 mm4 about an axis inclined 45 degrees counter – clockwise which passes through the centroid.

  • A. 250 x 106 mm4
  • B. 190 x 106 mm4
  • C. 210 x 106 mm4
  • D. 230 x 106 mm4

237. A precast beam of length l is to be lifted at two points. The Two points should be at ______ distance from the ends so the maximum moment is as small as possible.

  • A. 0.21 l
  • B. 0.33 l
  • C. 0.50 l
  • D. 0.25 l

238. A simply supported beam of length 7 m has a concentrated couple Mo of 10 KN-m applied at one end. The maximum deflection is located at this distance from the applied load.

  • A. 2.50 m
  • B. 2.252 m
  • C. 3.95 m
  • D. 2.75 m

239. A beam length L and with both ends fixed against rotation carries a concentrated load E somewhere along the span. If L obtained when concentrated is at this distance from one of the supports.

  • A. 0.23 L
  • B. 0.375 L
  • C. 0.50 L
  • D. 0.25 L

240. A propped cantilever beam (fixed at one end and simply supported at the other end) has a span L of 6.0 m the beam carries a uniform load W of 600 KN/m throughout the span. Compute the rotation at the simply supported end.

  • A. 1350/EI
  • B. 10800/EI
  • C. 5400/EI
  • D. 2700/EI

241. A simple beam of length L has a concentrated load of P at a distance A from the left support and B from the right support. The maximum moment in the beam is:

  • A. Pa2 /L
  • B. None in the list
  • C. Pa2 /L2
  • D. Pab/L

242. A shear center of an H section with unequal flange is located rearer to the bigger flange. If the smaller flange is 16 mm by 100 mm, the larger is 16 mm by 200 mm, and the web is 9 mm by 284 mm, the distance of the shear center from the center of the bigger flange is:

  • A. 248 mm
  • B. 31.56 mm
  • C. 142 mm
  • D. 252.44 mm

243. Calculate the moment applied at the end of a flat steel bar 1.2 m long that will produce a midpoint deflection of 40 mm. The flat bar is 75 mm wide and 9 mm thick. Use E = 200000 MPa.

  • A. 202.5 N-m
  • B. 404.5 N-m
  • C. 303.5 N-m
  • D. 505.5 N-m

244. This subject involved analytical methods for determining strength, stiffness (deformation characteristics) and stability of the various member in a structural system:

I. Mechanics of materials

II. Strength of materials

III. Mechanics of deformable bodies

  • A. One of the three
  • B. Two of the three
  • C. One of the three
  • D. All of the three

245. A metal specimen with 36 mm diameter and has a length L = 360 mm. A force of 300 KN elongates the length by 1.2 mm. What is the elastic modulus?

  • A. 198763 MPa
  • B. 176829 MPa
  • C. 199999 MPa
  • D. 88419 MPa

246. Stress tensor contains the following independent stresses:

  • A. 6 normal stresses + 3 shearing stresses
  • B. 6 normal stresses + 6 shearing stresses
  • C. 3 normal stresses + 3 shearing stresses
  • D. 3 normal stresses + 6 shearing stresses

247. A simple beam having a span of 10 m. is subjected to a couple at the left support. At what distance from the left support will maximum deflection occurs?

  • A. 4.22 m.
  • B. 0
  • C. 5.5 m
  • D. 5 m

248. The allowable capacity of a 10 mm thick fillet weld, E 60 Electrode (Fu = 415 MPa) is:

  • A. 900 N/mm
  • B. 880 N/mm
  • C. 885 N/mm
  • D. 740 N/mm

249. The rotation or twist in degrees of a shaft, 800 mm long, subjected to a torque of 80 N-m, 20 in diameter, and shear modulus g of 80000 MPa is:

  • A. 3.95
  • B. 2.92
  • C. None in the list
  • D. 3.94

250. The location of the maximum shearing stress in the structural steel rolled section is at the :

  • A. Flange junction of web and flange
  • B. Web junction of web and flange
  • C. Uniform a cross section
  • D. Web neutral axis

Complete List of MCQs in General Engineering and Applied Science per topic


Published by: Froyd Wess00:00

Saturday, February 28, 2015

Strength of Materials - MCQs Part IV - Answers

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Answers in Strength of Materials - MCQs Part 4

Below are the answers key for the Multiple Choice Questions in Strength of Materials Part 4.

151. Point of inflection

152. 7.98 in.

153. 900

154. 5.046 mm.

155. Poisson’s ratio

156. Fourth power

157. The integral of y2Da

158. Proportional to the displacement

159. Where the shearing stress is zero

160. Inversely proportional to the modulus of elasticity and moment of inertia

161. Unit lateral deformation to the unit longitudinal deformation

162. Elastic range

163. Is the ratio of maximum stress produced in a section to the average stress over the section

164. Define as the unit shear stress divided by the unit shear deformation (shear strain)

165. 50%

166. Change in shear between two points

167. 1.33 n/mm2

168. Elastic range

169. Zero

170. Shorten by pl/ae

171. Torsional strength

172. 919 lbs.

173. 199 hp

174. 10 tons

175. 3600 psi

176. 25,347 lbs.

177. 2282 rpm

178. 24740 lbs

179. 1.215 x 10-6 m4

180. 41.905 x 106

181. ¼ in.

182. Bh3/12

183. 35.89

184. 8.5 coils

185. 551 mm

186. 4 5/8” dia.

187. 2 min.

188. 4500

189. 41.905 x 106 Psi

190. 61800 lbs.

191. 0.71 in.

192. 380

193. Measure a distance

194. Elasticity

195. 0.577 l

196. All of the above

197. Proportional to the displacement

198. Elastic range

199. Where the shearing is zero

200. Directly proportional to the modulus of elasticity and moment of inertia

Online Questions and Answers in Strength of Materials Series

Following is the list of practice exam test questions in this brand new series:

Strength of Materials MCQs
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III

Complete List of MCQs in General Engineering and Applied Sciences per topic


Published by: Froyd Wess06:00

Strength of Materials - MCQs Part IV

Filed under:

MCQs in Strength of Materials Part 4

This is the Multiples Choice Questions Part 4 of the Series in Strength of Materials as one of the General Engineering and Applied Sciences (GEAS) topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including past Board Questions in General Engineering and Applied Sciences (GEAS) field.

Online Questions and Answers in Strength of Materials Series

Following is the list of multiple choice questions in this brand new series:

Strength of Materials MCQs
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III

Continue Practice Exam Test Questions Part IV of the Series

151. The section of a beam at which the bending moment changes from positive to negative is called.

  • A. Critical point
  • B. Deflection point
  • C. Point of inflection
  • D. None of the above

152. A circular steel plate must fit into an opening whose area is fifty square inches. Find the diameter of the plate to two decimal places.

  • A. 7.98 in.
  • B. 8.65 in.
  • C. 6.45 in.
  • D. 9.60 in.

153. Find the constant of 81 Hp in a 3 inches cold rolled line shafting which transmitted 210 rpm.

  • A. 900
  • B. 600
  • C. 800
  • D. 500

154. A steel wire 10 m. long , hanging vertically supports a tensile Load of 1000 N. Neglecting the weight of the wire, determine The required diameter if the elongation is not to exceed 2.5 mm. Assume e = 200 gpa.

  • A. 5.046 mm.
  • B. 3.596 mm.
  • C. 4.297 mm.
  • D. 6.382 mm.

155. The ratio of the lateral expansion to the longitudinal shortening of a concrete cylinder when subjected to compressive load.

  • A. Modulus of elasticity
  • B. Poisson’s ratio
  • C. Modulus of rupture
  • D. None of the above

156. The moment of inertia of any plane figure can be expressed in units of length to the:

  • A. First power
  • B. Second power
  • C. Third power
  • D. Fourth power

157. The moment of inertia about the principal x – x axis of a cross section is:

  • A. The integral of y2Da
  • B. The integral of xda
  • C. The integral of x2Da
  • D. The integral of xyda

158. The stress in an elastic material is:

  • A. Inversely proportional to the materials yield strength
  • B. Inversely proportional to the force acting
  • C. Proportional to the displacement
  • D. Inversely proportional to the strain

159. Principal stresses occur on those planes:

  • A. Where the shearing stress is zero
  • B. Which are 45° Apart
  • C. Where the shearing stress in minimum
  • D. Which are subjected to pure tension

160. The deflection of a beam is:

  • A. Directly proportional to the modulus of elasticity and Moment of inertia
  • B. Inversely proportional to the modulus of elasticity and moment of inertia
  • C. Directly proportional to the load imposed and inversely to the length squared
  • D. Inversely proportional to the weight and length

161. Poisson’s ratio is the ratio of the:

  • A. Unit lateral deformation to the unit longitudinal deformation
  • B. Unit stress to unit strain
  • C. Elastic limit to proportional limit
  • D. Shear to compressive strain

162. The linear portion of the stress – strain diagram of steel is known as the:

  • A. Modulus of elongation
  • B. Plastic range
  • C. Strain hardening
  • D. Elastic range

163. Stress concentration factor:

  • A. Is a ratio of average stress on a section to the allowable stress
  • B. Is the ratio of areas involved in a sudden change of cross section
  • C. Is the ratio of maximum stress produced in a section to the average stress over the section
  • D. Is the load factor applied to loads

164. Modulus of rigidity of a steel member is

  • A. Define as the unit shear stress divided by the unit shear deformation (shear strain)
  • B. Equal to the modulus of elasticity divided by one plus Poisson’s ratio
  • C. Defined as the length divided by the moment of inertia
  • D. Equal to approximately 7/10 of the modulus of elasticity

165. Fixing both ends of a simply supported beam that has a uniform load throughout the span will increase the allowable load by:

  • A. 25%
  • B. 50%
  • C. 75%
  • D. 100%

166. The area of the shear diagram between any two points on the beam is equal to:

  • A. Change in shear between two points
  • B. Total shear between the two points
  • C. Average moment between the two points
  • D. Change in moment between the two points

167. A thin walled cylindrical shell has an internal diameter of 2 m. And is fabricated from plates 20 mm. Thick. Calculate the safe pressure in the shell if the tensile strength of the Plate is 400 kN/mm2 and the factor of safety is 6.

  • A. 1.33 n/mm2
  • B. 0.33 n/mm2
  • C. 13.3 n/mm2
  • D. 133.3 n/ mm2

168. The linear portion of the stress-strain diagram of the steel is known as the:

  • A. Modulus of elongation
  • B. Plastic range
  • C. Strain hardening
  • D. Elastic range

169. For a system to be in equilibrium, the sum of the external forces acting on the system must be:

  • A. Equal to unity
  • B. A maximum
  • C. Indeterminate
  • D. Zero

170. A short structural member of length l, area a and modulus of elasticity e, subjected to a compression load of p. The member will:

  • A. Elongated by pl/ae
  • B. Shorten by pl/ae
  • C. Buckle at π2 Ei/ll
  • D. None of the above

171. What is a metal characteristic to withstand forces that cause twisting?

  • A. Torsional strength
  • B. Modulus of elasticity
  • C. Twisting moment
  • D. Elasticity

172. Determine the estimate weight of an A-36 steel plate size 3/16 x 6’ 20’.

  • A. 919 lbs.
  • B. 1012 lbs.
  • C. 829 lbs.
  • D. 735 lbs.

173. A 3’’ diameter short shaft carrying two pulley close to the bearings transmit how much horsepower if the shaft makes 280 rpm?

  • A. 199 hp
  • B. 198 hp
  • C. 200 hp
  • D. 210 hp

174. What pressure is required to punch a hole 2’’

  • A. 10 tons
  • B. 20 tons
  • C. 30tons
  • D. 40 tons

175. Compute the working strength of a 1’’ bolt which is screwed up tightly in a packed joint when the allowable working stress is 13000psi?

  • A. 3600 psi
  • B. 3950 psi
  • C. 3900 psi
  • D. 3800 psi

176. What is the working strength of a 2’’ bolt which is screwed up tightly in a packed joint when the allowable working stress is 12000 psi?

  • A. 20,120 lbs.
  • B. 25,347 lbs.
  • C. 20,443 lbs.
  • D. 20,200 lbs.

177. Compute the speed of the gear mounted on a 52.5 mm diameter shaft receiving power from a driving motor with 250hp.

  • A. 2182 rpm
  • B. 2071 rpm
  • C. 2282 rpm
  • D. 2341 rpm

178. What force p is required to punch a ½ in. Hole on a 3/8 in. Thick plate if the ultimate shear strength of the plate is 42000 psi?

  • A. 24940 lbs
  • B. 24620 lbs
  • C. 24960 lbs
  • D. 24740 lbs

179. A hollow shaft has inner diameter of 0.035 m. And outer Diameter of 0.06 m. Determine the polar moment of inertia of the hollow shaft.

  • A. 1.512 x 10-6 m4
  • B. 1.215 x 10-6 m4
  • C. 1.152 x 10-6 m4
  • D. 1.125 x 10-6 m4

180. What is the modulus of elasticity if the stress is 44,000 psi and a unit of 0.00105?

  • A. 41.905 x 106
  • B. 42.300 x 106
  • C. 41.202 x 106
  • D. 43.101 x 106

181. Determine the thickness of a steel air receiver with 30 inches diameter and pressure load of 120 psi. Design stress of 8000 psi.

  • A. ¼ in.
  • B. 5/8 in.
  • C. 3/8 in.
  • D. ½ in.

182. The section modulus of a rectangular of base “b” and height “h” about its base is:

  • A. Bh2/6
  • B. Bh3/3
  • C. Bh2/12
  • D. Bh3/12

183. A 2-in. Solid shaft is driven by a 36-in. Gear and transmits power at 120 rpm. If allowable shearing stress is 12 psi, what Horsepower can be transmitted?

  • A. 29.89
  • B. 35.89
  • C. 38.89
  • D. 34.89

184. A coiled spring with 5 cm. Of outside diameter is required to work under the load of 190 n. The wire diameter is 15 mm, the spring is to have 6 active coils and the ends to be closed and round. Determine the total number of coils. The modulus of rigidity is 80gpa and the mean radius is to be 23 mm, with 7 mm pitch of the spring.

  • A. 6.5 coils
  • B. 7.5 coils
  • C. 8.5 coils
  • D. 9.5 coils

185. A helical spring having square and ground ends has a total of 18 coils and its material has modulus of elasticity in shear of 78.910 GPa. If the spring has an outside diameter of 10.42 cm. and a wire diameter of 0.625 cm, compute the maximum deflection that can be produced in the spring due to a load of 50 Kgs.

  • A. 302 mm
  • B. 342 mm
  • C. 551 mm
  • D. 322 mm

186. Design the size of solid steel to be used for 500 Hp, 250 rpm application if the allowable torsional deflection is 1° and the allowable stress is 10,000 psi and modulus of rigidity is 13 X 106 Psi.

  • A. 5” dia.
  • B. 4 5/8” dia.
  • C. 4 7/8” dia.
  • D. 4 ¾” dia.

187. With the electric arc welding rate of 18 in./min., how long will It take to weld a ½ in. Thick plate by 3 ft. Long seam?

  • A. 3 min.
  • B. 2 min.
  • C. 1.5 min.
  • D. 4 min.

188. A hollow shaft has an inner diameter of 0.035 m. An outer diameter of 0.06 m. Compute for the torque if the shear Stress is not to exceed 120 GPa in nm.

  • A. 4500
  • B. 4100
  • C. 4300
  • D. 4150

189. What modulus of elasticity in tension is required to obtain a unit deformation of 0.00105 m/m from a load producing a unit tensile stress of 44,000 psi?

  • A. 42.300 x 106 Psi
  • B. 41.202 x 106 Psi
  • C. 43.101 x 106 Psi
  • D. 41.905 x 106 Psi

190. If the ultimate shear strength of steel plate is 42,000 lb/in2, what force is necessary to punch a 0.75 inch diameter hole in an inch thick plate?

  • A. 63008 lbs.
  • B. 68080 lbs.
  • C. 61800 lbs.
  • D. 66800 lbs.

191. A steel tie rod on bridge must be made to withstand a pull of 5000 lbs. Find the diameter of the rod assuming a factor of safety of 50 and ultimate stress of 64000 lb/in2.

  • A. 0.75 in.
  • B. 0.71 in.
  • C. 0.84 in.
  • D. 0.79 in.

192. Compute the nominal shear stresses at the surface in MPa for a 40 mm DIIA, meter shaft that transmit 750 KW at 1500 rpm. Axial and bending load are assumed negligible. Torsional shearing stress is 28 n/mm2.

  • A. 218
  • B. 312
  • C. 232
  • D. 380

193. The ratio of the moment of inertia of the cross-section of the beam to the section modulus.

  • A. Equal to the radius gyration
  • B. Equal to the area of the cross-section
  • C. Measure a distance
  • D. Dependent on the modulus of elasticity of the beam measure

194. Continuous stretching under load even if the stress is less than the yield point:

  • A. Plasticity
  • B. Elasticity
  • C. Creep
  • D. Ductility

195. The maximum moment in a simple beam subject to a triangular load beginning at zero from the left support to a value at the right support occurs at distance from the left support of:

  • A. 0.5 l
  • B. 0.577 l
  • C. 0.667 l
  • D. 0.750 l

196. Shear center of a cross section:

  • A. Is located at the centroid for wf and doubly symmetric shapes.
  • B. Can be located by equilibrium of internal torsional shear stresses with external torsional forces.
  • C. For singly symmetry cross section such as c shape, is located at the axis of symmetry but not at the centroid.
  • D. All of the above

197. The stress in an elastic material is:

  • A. Inversely proportional to the materials yield strength
  • B. Inversely proportional to the force acting
  • C. Proportional to the displacement
  • D. Inversely proportional to the strain

198. The linear portion of the stress- strain diagram of steel is known as the

  • A. Modulus of elasticity
  • B. Plastic range
  • C. Stain hardening
  • D. Elastic range

199. Principal stress occur on those planes

  • A. Where the shearing is zero
  • B. Which are 45° degrees apart
  • C. Where the shearing stress is a maximum
  • D. Which are subjected to pure tension

200. The deflection of the beam is

  • A. Directly proportional to the modulus of elasticity and moment of inertia
  • B. Inversely proportional to the modulus of elasticity and moment of inertia
  • C. Directly proportional to the load imposed and inversely to the length squared
  • D. Inversely proportional to the weight and length

Complete List of MCQs in General Engineering and Applied Science per topic


Published by: Froyd Wess00:00

Friday, February 27, 2015

Physics - MCQs Part XIV - Answers

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Answers in Physics - MCQs Part 14

Below are the answers key for the Multiple Choice Questions in Physics - MCQs Part 14.

651. 36.17 lb.

652. 24.6 N

653. 15.4 N

654. 3.395 m/s2

655. 0.8 kg

656. 71.5 kg

657. 5.7675 lbs.

658. 2.3 kg

659. 57.3°

660. 1530 N

661. 24.696 N

662. 1415 J

663. 7.77 m/s

664. 108,400 J

665. 8.94 m

666. 30130 J

667. -42175 J

668. 4218 J

669. 372.3 J

670. 0.28

671. 55.2 m

672. 2.97 kg

673. 0.5243 J*s

674. 4.8 rpm

675. 1.223 m/s

676. 34.86 lb.

677. 27 N

678. 0.02484 s

679. 7.091 m/s2

680. 28.90 kg

681. 1530 N

682. 56.569 N

683. 2.917 m/s2

684. 4.1 kg

685. -3.1 lbs.

686. 37.63 N

687. -52.16 N

688. 2.3 kg

689. 57.3°

690. 72.128 N

691. 12.6 kg

692. 0.51

693. 0.2857

694. 1415 J

695. 30130 J

696. 125.4 kg

697. 4218 J

698. 4.62 m

699. 126.2 kg

700. 372.3 J

Online Questions and Answers in Physics Series

Following is the list of practice exam test questions in this brand new series:

College Physics MCQs
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III
PART 4: MCQs from Number 151 – 200                 Answer key: PART IV
PART 5: MCQs from Number 201 – 250                 Answer key: PART V
PART 6: MCQs from Number 251 – 300                 Answer key: PART VI
PART 7: MCQs from Number 301 – 350                 Answer key: PART VII

Complete List of MCQs in General Engineering and Applied Sciences per topic


Published by: Froyd Wess06:00

Physics - MCQs Part XIV

Filed under:

MCQs in Physics Part 14

This is the Multiples Choice Questions Part 14 of the Series in Physics as one of the General Engineering and Applied Sciences (GEAS) topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including past Board Questions in General Engineering and Applied Sciences (GEAS) field.

Online Questions and Answers in Physics Series

Following is the list of multiple choice questions in this brand new series:

College Physics MCQs
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III
PART 4: MCQs from Number 151 – 200                 Answer key: PART IV
PART 5: MCQs from Number 201 – 250                 Answer key: PART V
PART 6: MCQs from Number 251 – 300                 Answer key: PART VI
PART 7: MCQs from Number 301 – 350                 Answer key: PART VII

Continue Practice Exam Test Questions Part XIV of the Series

Newton's First Law

651. A light hangs from two cables. One cable has a tension of 39.72 lb. and is at an angle of 43.4° with respect to the ceiling. What is the weight of the lamp if the other cable makes an angle of 17.1° with respect to the ceiling?

  • a. 37.2 lb.
  • b. 35.8 lb.
  • c. 36.8 lb.
  • d. 36.17 lb.

652. A 46.07 N light hangs from two cables at angles 54.9° and 61.4° with respect to the ceiling. What is the tension in the first cable?

  • a. 24.6 N
  • b. 25 N
  • c. 23.9 N
  • d. 26.4 N

653. A light hangs from two cables. One cable has a tension of 28.75 N and is at an angle of 58.1° with respect to the ceiling. What is the tension in the other cable if it makes an angle of 9.4° with respect to the ceiling?

  • a. 15.9 N
  • b. 16.1 N
  • c. 15.4 N
  • d. 14.9 N

Newton's Second Law

654. A 8.3 kg mass and a 17.1 kg mass are tied to a light string and hung over a frictionless pulley. What is their acceleration?

  • a. 33.95 m/s2
  • c. 4.395 m/s2
  • b. 4 m/s2
  • d. 3.395 m/s2

655. An unknown mass and a 9.9 kg mass are tied to a light string and hung over a frictionless pulley. If the tension in the string is 14.5 N, what is the unknown mass?

  • a. 1 kg
  • b. 0.8 kg
  • c. 1.8 kg
  • d. 0.5 kg

656. A lady pulls a cart with a force of 1837 N. Neglecting friction, if the cart changes from resting to a speed of 1.3 m/s in a distance of0.03289 m, what is the total mass of the cart?

  • a. 71.5 kg
  • b. 75.1 kg
  • c. 70.5 kg
  • d. 17.5 kg

657. A 3.66 lb. book is resting on a 19.41 lb. table. What is the normal force from the floor on each table leg?

  • a. 5 lbs.
  • b. 5.7675 lbs.
  • c. 4.9 lbs.
  • d. 6.7675 lbs.

658. A box sits on a ramp inclined at 21.7° to horizontal. If the normal force on the box from the ramp is 20.94 N, what is the mass of the box?

  • a. 3.2 kg
  • b. 2.9 kg
  • c. 2.3 kg
  • d. 3.9 kg

659. A 7.9 kg box sits on a ramp. If the normal force on the box from the ramp is 41.82 N, what is the angle the ramp makes with the (horizontal) ground?

  • a. 75.3°
  • c. 57.3°
  • b. 57.5°
  • d. 75.5°

660. A man sees a 44.5 kg cart about to bump into a wall at 1.7 m/s. If the cart is 0.04203 m from the wall when he grabs it, how much force must he apply to stop it before it hits?

  • a. 1530 N
  • c. 1350 N
  • b. 1250 N
  • d. 1520 N

661. What is the minimum force required to start a 4.2 kg box moving across the floor if the coefficient of static friction between the box and the floor is 0.6?

  • a. 23.761 N
  • b. 25.469 N
  • c. 24.696 N
  • d. 26.496 N

662. What is the kinetic energy of a 70 kg man running along at 6.36 m/s?

  • a. 1315 J
  • b. 1515 J
  • c. 1215 J
  • d. 1415 J

663. What is the speed of a 53.6 kg woman running with a kinetic energy of 1617 J?

  • a. 7.77 m/s
  • b. 7.57 m/s
  • c. 7.67 m/s
  • d. 7.87 m/s

664. What is the gravitational potential energy of a149.1 kg man at a height of h = 74.21 m above the ground? (consider h = 0 to be the reference where Ug = 0)

  • a. 100,000 J
  • b. 107,300 J
  • c. 108,400 J
  • d. 110,580 J

665. What is the height where a 121.2 kg woman would have a gravitational potential energy of 10610 J? (consider h = 0 to be the reference where the Ug = 0)

  • a. 9.54m
  • b. 7.57m/s
  • c. 8.94 m
  • d. 7.87m/s

666. What is the change in gravitational potential energy for a 68.9 kg man walking up stairs from a height of 63.07 m to 107.69 m?

  • a. -30133 J
  • b. 301230 J
  • c. 30320 J
  • d. 30130 J

667. What is the change in gravitational potential energy for a 132.5 kg woman walking down a hill from a height of 102.86 m to 70.38 m?

  • a. -4123 J
  • b. -42175 J
  • c. -5 J
  • d. 4321 J

668. How much work is done by gravity when a 82.3 kg. diver jumps from a height of 5.23 m into the water?

  • a. 4321 J
  • b. 4218 J
  • c. 4871 J
  • d. 4334 J

669. How much work must be done to move a 34.6 kg box 3.66 m across the floor if the coefficient of kinetic friction between the box and the floor is 0.3.

  • a. 372.3 J
  • b. -321.9 J
  • c. -372.3 J
  • d. 3.234 J

670. What is the coefficient of kinetic friction between a 16 kg box and the floor if it takes 140.4 J of work to move it a distance of 3.2 m?

  • a. 0.28
  • b. -0.25
  • c. 0.281
  • d. 0.21

671. What is the length of a 73.7 m wide rectangular lab if its mass is 1.01 kg and the moment of intertia about an axis through the center and perpendicular to the large flat face if its mass is 713.6 kg*m2?

  • a. 55.2 m
  • b. 53.5 m
  • c. 52.5 m
  • d. 54.5 m

672. What is the mass of a hollow cylinder of radius3.38 m if it has a moment of inertia of 33.930468 kg*m2 about the central axis or rotation?

  • a. 3.07 kg
  • b. 2.50 kg
  • c. 2.97 kg
  • d. 1.95 kg

673. A 0.324 kg ball is stuck 0.54 m from the center of a disk spinning at 5.55 rad/s. What is its angular momentum?

  • a. 0.5243 J*s
  • b. 0.6321 J*s
  • c. 1.021 J*s
  • d. 1.1524 J*s

674. A 40.2 kg child is sitting on the edge of a 165.3 kg merry-go-round of radius 2.1 m while it is spinning at a rate of 3.229 rpm. If the child moves to the center, how fast will it be spinning? (Hint: use conservation of angular momentum)

  • a. 4.5 rpm,
  • b. 4.4 rpm
  • c. 4.2 rpm
  • d. 4.8 rpm

675. An empty metal can rolling down a hill gets to the bottom with a speed of 1.06 m/s. What would have been the speed if the can was full? (Assume the ends of the hollow can don't significantly affect its moment of inertia and the walls are so thin that the full can may be considered as a solid cylinder of the same radius)

  • a. 1.333 m/s
  • b. 1.423 m/s
  • c. 1.223 m/s
  • d. 1.323 m/s

676. A light hangs from two cables. One cable has a tension of 23.83 lb. and is at an angle of 26.2° with respect to the ceiling. What is the weight of the lamp if the other cable makes an angle of 48.7° with respect to the ceiling?

  • a. 34.86 lb.
  • b. 33.9 lb.
  • c. 35.8 lb.
  • d. 36 lb.

677. A light hangs from two cables. One cable has a tension of 25.55 N and is at an angle of 7.5° with respect to the ceiling. What is the tension in the other cable if it makes an angle of 20.2° with respect to the ceiling?

  • a. 28 N
  • b. 26 N
  • c. 27 N
  • d. 29 N

678. A man is pulling a cart (total 26.7 kg) with a force of 1612 N. Neglecting friction, how much time does it take to get the cart from rest up to 1.5 m/s?

  • a. 0.04583s
  • b. 0.01252s
  • c. 0.03567s
  • d. 0.02484 s

679. A lady is pulling a cart (total 55.7 kg) with a force of 395 N. Neglecting friction, what is the acceleration of the cart?

  • a. 7.1 m/s2
  • b. 7.092 m/s2
  • c. 7.091 m/s2
  • d. 7.093 m/s2

680. A lady pulls a cart with a force of 1454 N. Neglecting friction, if the cart changes from resting to a speed of 1.7 m/s in a distance of 0.02872 m, what is the total mass of the cart?

  • a. 28.90 kg
  • b. 28.91 kg
  • c. 27.90 kg
  • d. 29.00 kg

681. A man sees a 44.5 kg cart about to bump into a wall at 1.7 m/s. If the cart is 0.04203 m from the wall when he grabs it, how much force must he apply to stop it before it hits?

  • a. 1530 N
  • b. 1730 N
  • c.1630 N
  • d.1830 N

682. A 5.4 kg mass and a 6.2 kg mass are tied to a light string and hung over a frictionless pulley. What is the tension in the string?

  • a. 56.57 N
  • b. 55.569 N
  • c. 57.1 N
  • d. 56.569 N

683. A 4.6 kg mass and an 8.5 kg mass are tied to a light string and hung over a frictionless pulley. What is their acceleration?

  • a. 2.92 m/s2
  • b. 2.916 m/s2
  • c. 2.917 m/s2
  • d. 3 m/s2

684. An unknown mass and a 13.2 kg mass are tied to a light string and hung over a frictionless pulley. If the tension in the string is 61.3114 N, what is the unknown mass?

  • a. 4.12 kg
  • b. 4.1 kg
  • c. 4.0 kg
  • d. 4.2kg

685. A 3.1 lb. book is resting on a 73.76 lb. table. What is the normal force of the book on the table?

  • a. -3.2 lbs.
  • b. -3.1 lbs.
  • c. 3.2 lbs.
  • d. 3.1 lbs.

686. A 5.2 kg box sits on a ramp inclined at 42.4° to horizontal. What is the normal force on the box from the ramp?

  • a. 37.64N
  • b. 37.53N
  • c. 37.54 N
  • d. 37.63 N

687. A 6.7 kg box sits on a ramp inclined at 37.4° to horizontal. What is the normal force on the ramp from the box?

  • a. 52.17 N
  • b. 52.16 N
  • c. -52.16 N
  • d. -52.17 N

688. A box sits on a ramp inclined at 21.7° to horizontal. If the normal force on the box from the ramp is 20.94 N, what is the mass of the box?

  • a. 2.3 kg
  • b. 2.4 kg
  • c. 2.2 kg
  • d. 2.1 kg

689. A 7.9 kg box sits on a ramp. If the normal force on the box from the ramp is 41.82 N, what is the angle the ramp makes with the (horizontal) ground?

  • a. 57.3°
  • b. 56.3°
  • c. 57.4°
  • d. 55.3°

690. What is the minimum force required to start a 11.5 kg box moving across the floor if the coefficient of static friction between the box and the floor is 0.64?

  • a. 72.13N
  • b. 72.1 N
  • c. 72.13 N
  • d. 72.128 N

691. What is the mass of a box which requires a minimum pushing force of 74.088 N to start moving across a floor with a coefficient of static friction between the box and the floor of 0.6?

  • a. 12.2 kg
  • b. 12.6 kg
  • c. 13 kg
  • d. 12.5 kg

692. If a minimum force of 79.4682 N is required to push on a 15.9 kg box to begin moving it across the floor, what is the coefficient of static friction between the box and the floor?

  • a. 0.51
  • b. 0.52
  • c. 0.53
  • d. 0.54

693. A box is sliding down a ramp with an acceleration of 1.621 m/s2. If the ramp is at an angle of 25.1° relative to the ground, what is the coefficient of kinetic friction between the box and the ramp?

  • a. 0.2857
  • b. 0.3000
  • c. 0.2856
  • d. 0.2867

694. What is the kinetic energy of a 70 kg man running along at 6.36 m/s?

  • a. 1416 J
  • b. 1417 J
  • c. 1415 J
  • d. 1418 J

695. What is the change in gravitational potential energy for a 68.9 kg man walking up stairs from a height of 63.07 m to 107.69 m?

  • a. 30130 J
  • b. 30132J
  • c. 30131 J
  • d. 30133 J

696. What is the mass of a diver whose gravitational potential energy changes by -160,500 J when diving into water from a height of 130.61 m?

  • a. 125.2 kg
  • b. 125.3 kg
  • c. 125.5 kg
  • d. 125.4 kg

697. How much work is done by gravity when a 82.3 kg diver jumps from a height of 5.23 m into the water?

  • a. 4220 J
  • b. 4218 J
  • c. 4229 J
  • d. 4219 J

698. What height above the water does a 133.9 kg diver jumps need to jump from for gravity to do 6062 J of work on him/her?

  • a. 4.61 m
  • b. 4.60 m
  • c. 4.62 m
  • d. 4.63 m

699. What is the mass of a diver if gravity does 8100 J of work on him/her when jumping into the water from a height of 6.55 m? What is the mass of a diver if gravity does 8100 J of work on him/her when jumping into the water from a height of 6.55 m?

  • a. 126.2 kg
  • b. 126.1 kg
  • c. 126.4 kg
  • d. 126.3 kg

700. How much work must be done to move a 34.6 kg box 3.66 m across the floor if the coefficient of kinetic friction between the box and the floor is 0.3?

  • a. 372.2 J
  • b. 372.3 J
  • c. 372.4 J
  • d. 372.5 J

Complete List of MCQs in General Engineering and Applied Science per topic


Published by: Froyd Wess00:00

Thursday, February 26, 2015

Physics - MCQs Part XIII - Answers

Filed under:

Answers in Physics - MCQs Part 13

Below are the answers key for the Multiple Choice Questions in Physics - MCQs Part 13.

601. real image

602. virtual image

603. converging lens

604. diverging lens

605. diverging lens

606. spherical aberration

607. coma

608. distortion

609. astigmatism

610. accommodation

611. myopia

612. hyperopia

613. magnifier

614. angular magnification

615. optical dispersion

616. achromatic prism or lens

617. chromatic aberration

618. prism spectroscope

619. fluorescence

620. phosphorescence

621. colorimetry

622. characteristic of color

623. chief spectral hues

624. complementary beams

625. primaries

626. chromaticity coordinates

627. Newton’s ring

628. Michelson interferometer

629. diffraction

630. polarization

631. angle of polarization

632. polarimeters

633. electrostatics

634. electrification

635. first law of electrostatics

636. positive charge

637. negative charge

638. law of conservation of charge

639. nucleus

640. electrons

641. proton

642. neutrons

643. free electron

644. insulator

645. semiconductor

646. leaf electroscope

647. statcoulomb

648. coulomb

649. electric field

650. line of force

Online Questions and Answers in Physics Series

Following is the list of practice exam test questions in this brand new series:

College Physics MCQs
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III
PART 4: MCQs from Number 151 – 200                 Answer key: PART IV
PART 5: MCQs from Number 201 – 250                 Answer key: PART V
PART 6: MCQs from Number 251 – 300                 Answer key: PART VI
PART 7: MCQs from Number 301 – 350                 Answer key: PART VII

Complete List of MCQs in General Engineering and Applied Sciences per topic


Published by: Froyd Wess18:00