If a solid shaft (diameter 20 cm, length 400 cm, N = 0.8 × 105 N/mm2) when subjected to a twisting moment, produces maximum shear stress of 50 N/mm 2, the angle of twist in radians, is_________________?

Related Mcqs:

1. 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

2. A compound bar consists of two bars of equal length. Steel bar cross -section is 3500 mm2and that of brass bar is 3000 mm2. These are subjected to a compressive load 100,000 N. If Eb = 0.2 MN/mm2 and Eb = 0.1 MN/mm2, the stresses developed are___________________?

   A. b = 10 N/mm2 s = 20 N/mm 2
   B. b = 8 N/mm2 s = 16 N/mm2
   C. b = 6 N/mm2 s = 12 N/mm2
   D. b = 5 N/mm2 s = 10 N/mm2

3. If the strain energy stored per unit volume in a hollow shaft subjected to a pure torque when t attains maximum shear stress fs the ratio of inner diameter to outer diameter, is 17/64 (f /N)s__________________?

   A. 1/2
   B. 1/3
   C. 1/4
   D. 1/5

4. The ratio of maximum shear stress to average shear stress of a circular beam, is________________?

   A. 2/3
   B. 3/2
   C. 3/4
   D. 4/3

5. If a concrete column 200 × 200 mm in cross-section is reinforced with four steel bars of 1200 mm2 total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm2 and Es is 15 Ec________________?

   A. 264 MN
   B. 274 MN
   C. 284 MN
   D. 294 MN

6. A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a load at its centre. If the maximum stress induced in the bar is limited to N/mm2, the bending strain energy stored in the bar, is___________________?

   A. 411 N mm
   B. 511 N mm=
   C. 611 N mm
   D. 711 N mm

7. A shaft subjected to a bending moment M and a torque T, experiences__________________?

   A. Maximum bending stress = 32M d3
   B. Maximum shear stress = 16 T d3
   C. Both A. and B.
   D. Neither A. nor B.

8. The maximum magnitude of shear stress due to shear force F on a rectangular section of area A at the neutral axis, is__________________?

   A. F/A
   B. F/2A
   C. 3F/2A
   D. 2F/3A

9. The ratio of the length and diameter of a simply supported uniform circular beam which experiences maximum bending stress equal to tensile stress due to same load at its mid span, is___________________?

   A. 1/8
   B. 1/4
   C. 1/2
   D. 1/3

10. In a shaft, the shear stress is not directly proportional to_________________?

    A. Radius of the shaft
    B. Angle of twist
    C. Length of the shaft
    D. Modulus of rigidity