# Fundamentals of Machine Design (3141907) MCQ

### MCQs of Torsion

MCQ No - 1

#### In the torsion equation, $\frac{T}{J}=\frac{\tau }{R}=\frac{C.\theta }{l}$ the term J/R is called

(A) shear modulus
(B) section modulus
(C) polar modulus
(D) none of these

C
MCQ No - 2

#### When two shafts of same length, one of which is hollow, transmit equal torques and have equal maximum stress, then they should have equal

(A) polar moment of inertia
(B) polar modulus
(C) diameter
(D) angle of twist

B
MCQ No - 3

#### Torque transmitted by a solid shaft of diameter (d), when subjected to shear stress (𝞽) is equal to

(A) $\frac{\pi }{16}×\tau ×{d}^{2}$
(B) $\frac{\pi }{16}×\tau ×{d}^{3}$
(C) $\frac{\pi }{32}×\tau ×{d}^{2}$
(D) $\frac{\pi }{32}×\tau ×{d}^{3}$

B
MCQ No - 4

#### Polar moment of inertia of a solid shaft of diameter (d) is

(A) $\frac{\pi }{16}{d}^{3}$
(B) $\frac{\pi }{16}{d}^{4}$
(C) $\frac{\pi }{32}{d}^{3}$
(D) $\frac{\pi }{32}{d}^{4}$

D
MCQ No - 5

#### When a machine member is subjected to torsion, the torsional shear stress set up in the member is

(A) zero at both the centroidal axis and outer surface of the member
(B) maximum at both the centroidal axis and outer surface of the member
(C) zero at the centroidal axis and maximum at the outer surface of the member
(D) maximum at the centroidal axis and zero at the outer surface of the member

C