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Machine Design

Machine Design
The pitch of threads on a Jock nut in comparison to pitch of nut is

Very fine
Finer
Coarser
Same

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Machine Design
If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to

0.6
0.5
0.25
0.2

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Machine Design
The velocity of sliding __________ the distance of the point of contact from the pitch point.

Does not depend upon
Is inversely proportional to
Is directly proportional to
Is equal to cos φ multiplied by

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Machine Design
The constant factor in case of R10 series of preferred numbers is

1.26
1.58
1.06
1.12

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Machine Design
Which of the following screw thread is used for power transmission in one direction only?

Buttress threads
Square threads
Multiple threads
Acme threads

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Machine Design
For hardening alloy steels and high speed steels, they are heated to

500 to 600°C
1300 to 1500°C
1100 to 1300°C
700 to 900°C

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