Strength of Materials

211. The forces, which meet at one point, but their lines of action do not lie in a plane, are called

  1. Coplanar non-concurrent forces
  2. Non-coplanar concurrent forces
  3. Non-coplanar non-concurrent forces
  4. Intersecting forces

Correct answer: (B)
Non-coplanar concurrent forces

212. The greatest eccentricity which a load W can have without producing tension on the cross-sectionof a short column of external diameter D and internal diameter d, is

  1. 4W/π (D2 - d2)
  2. π (D2 - d2)/32D
  3. (D2 + d2)/8D
  4. (D2 - d2)/8D

Correct answer: (C)
(D2 + d2)/8D

213. The intensity of direct longitudinal stress in the cross-section at any point distant r from the neutral axis, is proportional to

  1. r
  2. 1/r
  3. r2
  4. 1/r2

Correct answer: (A)
r

214. The law which states, "Within elastic limits strain produced is proportional to the stress producing it", is known as

  1. Bernoulli's law
  2. Stress law
  3. Hooke's law
  4. Poisson's law

Correct answer: (C)
Hooke's law

215. The length of a column, having a uniform circular cross-section of 7.5 cm diameter and whose ends are hinged, is 5 m. If the value of E for the material is 2100 tonnes/cm2, the permissible maximum crippling load will be

  1. 1.288 tonnes
  2. 12.88
  3. 128.8 tonnes
  4. 288

Correct answer: (B)
12.88

216. The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is

  1. Same
  2. Double
  3. Half
  4. Four times

Correct answer: (B)
Double

217. The materials which have the same elastic properties in all directions, are called

  1. Isotropic
  2. Brittle
  3. Homogeneous
  4. Hard

Correct answer: (A)
Isotropic

218. The maximum bending moment due to a moving load on a simply supported beam, occurs

  1. At the mid span
  2. At the supports
  3. Under the load
  4. Anywhere on the beam

Correct answer: (C)
Under the load

219. The maximum compressive stress at the top of a beam is 1600 kg/cm2 and the corresponding tensile stress at its bottom is 400 kg/cm2. If the depth of the beam is 10 cm, the neutral axis from the top, is

  1. 2 cm
  2. 4 cm
  3. 6 cm
  4. 8 cm

Correct answer: (D)
8 cm

220. The maximum deflection of

  1. A simply supported beam carrying a uniformly increasing load from either end and having the apex at the mid span is WL3/60EI
  2. A fixed ended beam carrying a distributed load over the span is WL3/384EI
  3. A fixed ended beam carrying a concentrated load at the mid span is WL3/192EI
  4. All the above

Correct answer: (D)
All the above

Previous
Page 22 of 31
Next
Copyright © EngineeringMCQ.com