Machine Design Objective Questions

These Machine Design Objective Questions are very important for the competitive exams like SSC JE, RRB, GATE, ISRO, DRDO, and all other competitive exams.

All these Machine Design Objective Questions are from the previous years’ papers of one of the exams mentioned before.

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1. When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as-

A. internal bevel gears

B. crown bevel gears

C. mitre gears

D. angular bevel gears

Click for Answer/Explanation

Correct Answer is B

2. Screws used for power transmission should have-

A. Low efficiency

B. strong efficiency

C. high efficiency

D. very fine threads

Click for Answer/Explanation

Correct Answer is C

3. To ensure self-locking in a screw jack it is must that helix angle-

A. equal to the friction angle

B. larger than the friction angle

C. smaller than the friction angle

D. such as to give maximum efficiency in lifting

Click for Answer/Explanation

Correct Answer is C

4. In the assembly design of shaft, pulley, and key, the weakest member is-

A. Key

B. Pulley

C. Shaft

D. None of these

Click for Answer/Explanation

Correct Answer is A

5. The creep in the belt drive is due to-

A. material of the pulleys

B. material of the belt

C. unequal size of the pulleys

D. unequal tension on tight and slack sides of the belt

Click for Answer/Explanation

Correct Answer is B

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