A shaft rotating N.R.M. under a torque T, transmits a power_______________?

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. 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

3. 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.

4. If and are external and internal diameters of a circular shaft respectively, its polar moment of inertia, is________________?

   A. D4 – d4)
   B. D4 – d4)
   C. D4 – d4)
   D. D4 – d4)

5. 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

6. 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

7. 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

8. 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

9. A simply supported uniform rectangular bar breadth b, depth d and length L carries an isolated load W at its mid-span. The same bar experiences an extension e under same tensile load. The ratio of the maximum deflection to the elongation, is________________?

   A. L/d
   B. L/2d
   C. (L/2d)²
   D. (L/3d)²

10. a uniform circular bar of diameter d and length , which extends by an The deflection of amount under a tensile pull , when it carries the same load at its mid-span, is___________________?

    A. el/2d
    B. e²l/3d²
    C. el²/3d²
    D. e²l²/3d²