Fundamentals of Machine Design (3141907) MCQs

MCQs of Torsion

Showing 1 to 7 out of 7 Questions
1.
In the torsion equation, TJ=τR=C.θl the term J/R is called
(a) shear modulus
(b) section modulus
(c) polar modulus
(d) none of these
Answer:

Option (c)

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
Answer:

Option (b)

3.
Torque transmitted by a solid shaft of diameter (d), when subjected to shear stress (𝞽) is equal to
(a) π16×τ×d2
(b) π16×τ×d3
(c) π32×τ×d2
(d) π32×τ×d3
Answer:

Option (b)

4.
Polar moment of inertia of a solid shaft of diameter (d) is
(a) π16d3
(b) π16d4
(c) π32d3
(d) π32d4
Answer:

Option (d)

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
Answer:

Option (c)

6.
The strain energy stored in a hollow shaft of external diameter D and internal diameter d when subjected to shear stress (τ) is equal to
(a) τ2CD2+d2D
(b) τ24CD2+d2D
(c) τ2CD2-d2D
(d) τ24CD2-d2D
Answer:

Option (b)

7.
The ratio of strengths of solid to hollow shafts, both having outside diameter D and hollow having inside diameter D/2, in torsion, is
(a) 1/4
(b) 1/2
(c) 1/16
(d) 15/16
Answer:

Option (d)

Showing 1 to 7 out of 7 Questions