Principal planes are subjected to_________________?

Related Mcqs:

1. A close coil helical spring when subjected to a moment M having its axis along the axis of the helix_________________?

   A. It is subjected to pure bending
   B. Its mean diameter will decrease
   C. Its number of coils will increase
   D. All the above

2. A cantilever of length is subjected to a bending moment at its free end. If EI is the flexural rigidity of the section, the deflection of the free end, is_________________?

   A. ML/EI
   B. ML/2EI
   C. ML²/2EI
   D. ML²/3EI

3. The strain energy stored in a spring when subjected to greatest load without being permanently distorted, is called______________?

   A. Stiffness
   B. Proof resilience
   C. Proof stress
   D. Proof load

4. A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is_________________?

   A. WL/2AE
   B. WL/AE
   C. W²L/AE
   D. W²L/2AE

5. 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

6. 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

7. 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

8. 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

9. 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.

10. In case of principal axes of a section________________?

    A. Sum of moment of inertia is zero
    B. Difference of moment inertia is zero
    C. Product of moment of inertia is zero
    D. None of these