Practice Pakistan's most useful MCQs for competitive exams

Y are the bending moment, moment of inertia, radius of curvature, modulus of If M, I, R, E, F, and elasticity stress and the depth of the neutral axis at section, then________________?

• (A)  M/I = R/E = F/Y
• (B)  I/M = R/E = F/Y
• (C)  M/I = E/R = E/Y
• (D)  M/I = E/R = Y/F

Answer

Submitted By :Ali Uppal

Total strain energy theory for the failure of a material at elastic limit, is known_________________?

• (A)  Guest’s or Trecas’ theory
• (B)  St. Venant’s theory
• (C)  Rankine’s theory
• (D)  Haig’s theory

Answer

Submitted By :Ali Uppal

A steel rod 1 metre long having square cross section is pulled under a tensile load of 8 tonnes. The extension in the rod was 1 mm only. If Esteel = 2 × 106 kg/cm2, the side of the rod, is_________________?

• (A)  1 cm
• (B)  1.5 cm
• (C)  2 cm
• (D)  2.5 cm

Answer

Submitted By :Ali Uppal

A steel bar 5 m × 50 mm is loaded with 250,000 N. If the modulus of elasticity of the material is 0.2 MN/mm2 and Poisson’s ratio is 0.25, the change in the volume of the bar is_________________?

• (A)  1.125 cm3
• (B)  2.125 cm3
• (C)  3.125 cm3
• (D)  4.125 cm2

Answer

Submitted By :Ali Uppal

In plastic analysis, the shape factor for a triangular section, is_________________?

• (A)  1.5
• (B)  1.34
• (C)  2.34
• (D)  2.5

Answer

Submitted By :Ali Uppal

0. At its elastic limit, the following statement is true, 0/E__________________?

• (A)  Strain is equal to
• (B)  Maximum shear stress = /2
• (C)  Strain energy = 0 0²/2E × volume
• (D)  All the above

Answer

Submitted By :Ali Uppal

A cantilever of length 2 cm and depth 10 cm tapers in plan from a width 24 cm to zero at its free end. If the modulus of elasticity of the material is 0.2 × 106 N/mm2, the deflection of the free end, is________________?

• (A)  2 mm
• (B)  3 mm
• (C)  4 mm
• (D)  5 mm

Answer

Submitted By :Ali Uppal

A shaft is subjected to bending moment M and a torque T simultaneously. The ratio of the maximum bending stress to maximum shear stress developed in the shaft, is____________________?

• (A)  M/T
• (B)  T/M
• (C)  2M/ T
• (D)  2T/M

Answer

Submitted By :Ali Uppal

A square column carries a load P at the centroid of one of the quarters of the square. If a is the side of the main square, the combined bending stress will be________________?

• (A)  p/a²
• (B)  2p/a²
• (C)  3p/a²
• (D)  4p/a²

Answer

Submitted By :Ali Uppal

The ratio of the maximum deflections of a simply supported beam with a central load W and of a cantilever of same length and with a load W at its free end, is________________?

• (A)  1/8
• (B)  1/10
• (C)  1/12
• (D)  1/16

Answer

Submitted By :Ali Uppal