Machine Design Notes

Complete Machine Design Notes (GATE)

Study Materials Mechanical Engineering

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Questions/Answers Mechanical Engineering

Numerical Problems

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Theory Problems

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MCQs

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

View 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

View 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 friction angle

C. smaller than friction angle

D. such as to give maximum efficiency in lifting

View 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

View 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

View Answer/Explanation

Correct Answer is B

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