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Test: Shafts, Keys & Couplings - 1 - Mechanical Engineering MCQ


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10 Questions MCQ Test Topicwise Question Bank for Mechanical Engineering - Test: Shafts, Keys & Couplings - 1

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

 A shaft made from ductile material is subjected to combined bending and twisting moments. Calculations based on which one of the following failure theories would give the most conservative values?

Test: Shafts, Keys & Couplings - 1 - Question 2

Identify the WRONG statement:

Detailed Solution for Test: Shafts, Keys & Couplings - 1 - Question 2

Axels do not transmit any torque and are subjected to the effect of bending loads only. A shaft not only supports a revolving part but also transmits torsional moment.

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Test: Shafts, Keys & Couplings - 1 - Question 3

The greatest twisting moment which a shaft section can resist is given by

Detailed Solution for Test: Shafts, Keys & Couplings - 1 - Question 3

Test: Shafts, Keys & Couplings - 1 - Question 4

For a hollow shaft of inner diameter band outer diameter D, the modulus of rupture is

Detailed Solution for Test: Shafts, Keys & Couplings - 1 - Question 4

The maximum shear Stress calculated by using the torsion formula is called modulus of rupture 

Test: Shafts, Keys & Couplings - 1 - Question 5

A solid circular shaft of diameter d is subjected to a pure torsional load T. When the same load is applied to a hollow shaft of outside diameter d and ratio of inside to outside diameter is the ratio of stress in the solid to that in the hollow shaft will be

Detailed Solution for Test: Shafts, Keys & Couplings - 1 - Question 5

Test: Shafts, Keys & Couplings - 1 - Question 6

Shaft design is generally made for the torsional moment kt T where factor kt takes into account the nature of load, for suddenly applied loads with shocks, the factor kt is usually taken as '

Detailed Solution for Test: Shafts, Keys & Couplings - 1 - Question 6

kt = 1 for gradually applied or steady loads
kt=1 -1.15 for suddenly applied load with minor shocks
kt = 1.5 - 3.0 for suddenly applied load with heavy shocks

Test: Shafts, Keys & Couplings - 1 - Question 7

A shaft of elliptical section (semi-major axis a and semi-minor axis b) is subjected to twisting moment T. The maximum shear stress occurs at the ends of minor axis and is given by

Test: Shafts, Keys & Couplings - 1 - Question 8

Some of the mechanical properties are
1. sufficiently high strength
2. low sensitivity to stress concentration
3. wear resistant                                                                                                                                                                                     

4. good machinability
5. ability to withstand shock and impact loads 

The desirable properties for a shaft and axle material are

Test: Shafts, Keys & Couplings - 1 - Question 9

The shaft consists of a number of shafts which are connected in axial direction by means of couplings called as

Test: Shafts, Keys & Couplings - 1 - Question 10

Consider the following statements regarding keys:
1. Key is used to connect the transmission shaft to rotating machine elements.
2. Key is used to connect the transmission shaft to reciprocating machine elements.
3. The primary function of the key is to transmit the torque from the shaft to the hub of the mating element and vice versa.
4. The keyway on the shaft results in better stress distribution.

Which of the above statements are valid?

Detailed Solution for Test: Shafts, Keys & Couplings - 1 - Question 10

The key way results in stress concentration in the shaft and the part becomes weak.

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