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Test: Torsion of Shafts - 2 - Mechanical Engineering MCQ


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10 Questions MCQ Test Topicwise Question Bank for Mechanical Engineering - Test: Torsion of Shafts - 2

Test: Torsion of Shafts - 2 for Mechanical Engineering 2024 is part of Topicwise Question Bank for Mechanical Engineering preparation. The Test: Torsion of Shafts - 2 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Torsion of Shafts - 2 MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Torsion of Shafts - 2 below.
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Test: Torsion of Shafts - 2 - Question 1

200 kW is to be transmitted by each of two separate shafts. A is running at 300 rpm and B at 350 rpm. Which shaft must have greater diameter?

Detailed Solution for Test: Torsion of Shafts - 2 - Question 1


As power is same,
TA > TB

or  
∴  

Test: Torsion of Shafts - 2 - Question 2

A circular bar AB of length L is fixed at end A and free at B. Torque T is acting simultaneously at B and C. What is the strain energy U stored in the bar?

Detailed Solution for Test: Torsion of Shafts - 2 - Question 2

Torque on part BC = T
Torque on part AC = 2T

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Test: Torsion of Shafts - 2 - Question 3

For a power transmission shaft transmitting power P at N rpm, the diameter is proportional to

Detailed Solution for Test: Torsion of Shafts - 2 - Question 3




∴  
∴  

Test: Torsion of Shafts - 2 - Question 4

If a shaft is rotating at N revolutions per minute with an applied torque TN-m, the power being transmitted by the shaft in watt is

Detailed Solution for Test: Torsion of Shafts - 2 - Question 4

Test: Torsion of Shafts - 2 - Question 5

For a circular shaft of diameter d subjected to torque T, the maximum value of the shear stress is

Detailed Solution for Test: Torsion of Shafts - 2 - Question 5


⇒ 
∴  

Test: Torsion of Shafts - 2 - Question 6

What is the maximum torque transmitted by a hollow shaft of external radius R and internal radius r?

Detailed Solution for Test: Torsion of Shafts - 2 - Question 6


∴ 

Test: Torsion of Shafts - 2 - Question 7

A solid shaft of circular cross-section is subjected to a torque T which produces a maximum shear stress τs in the shaft. The diameter of the shaft should be

Detailed Solution for Test: Torsion of Shafts - 2 - Question 7

From the equation of torsion 


⇒ 

Test: Torsion of Shafts - 2 - Question 8

The ratio of torque carrying capacity of solid shaft to that of a hollow shaft is given by
where K is ratio of inside to outside diameter?

Detailed Solution for Test: Torsion of Shafts - 2 - Question 8

τ should be same for both hollow and solid shaft

⇒ 
⇒ 
∴  

Test: Torsion of Shafts - 2 - Question 9

A shaft subjected to torsion experiences a pure shear stress τ on the surface. The maximum principal stress on the surface which is at 45° to the axis will have a value of

Detailed Solution for Test: Torsion of Shafts - 2 - Question 9

Test: Torsion of Shafts - 2 - Question 10

A solid shaft of diameter, d and length, L is fixed at both the ends. A torque T0 is applied at a distance L/4 from the left end as shown in figure given below.

The maximum shear stress in the shaft is

Detailed Solution for Test: Torsion of Shafts - 2 - Question 10


T1 + T2 = T0        ......(i)
From the equation of torsion


T1 = 3T2         ......(ii)
From equation (i) and (ii)

⇒ 
and  

Shear stress τ ∝T
Therefore maximum shear stress in the shaft witi be due to torque T1.
⇒  

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