Machine Design Objective Questions

Read More- Welding Types and Definitions Notes

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

2. Screws used for power transmission should have-

A. Low efficiency

B. strong efficiency

C. high efficiency

D. very fine threads

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

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

A. Key

B. Pulley

C. Shaft

D. None of these

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