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

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. 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

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. 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_________________?

   A. 0.001
   B. 0.002
   C. 0.0025
   D. 0.003

5. Pick up the incorrect statement from the following: The torsional resistance of a shaft is directly proportional to___________________?

   A. Modulus of rigidity
   B. Angle of twist
   C. Reciprocal of the length of the shaft
   D. Moment of inertia of the shaft section

6. The ratio of shear stress and shear strain of an elastic material, is________________?

   A. Modulus of Rigidity
   B. Shear Modulus
   C. Modulus of Elasticity
   D. Both A. and B

7. 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

8. Shear strain energy theory for the failure of a material at elastic limit, is due to_________________?

   A. Rankine
   B. Guest or Trecas
   C. St. Venant
   D. Von Mises

9. Maximum shear stress theory for the failure of a material at the elastic limit, is known________________?

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

10. For permissible shear stress fs, the torque transmitted by a thin tube of mean diameter D and wall thickness t, is________________?

    A. ( /2) t fs
    B. ( /2) t fs
    C. D2t fs
    D. ( /4) fs