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Machine Design

Machine Design
Screws used for power transmission should have

Very fine threads
Strong teeth
High efficiency
Low efficiency

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Machine Design
A saddle key __________ power through frictional resistance only.

Either A or B
Does not transmit
Transmits
None of these

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Machine Design
Three different weights fall from a certain height under vacuum. They will take

Same time to reach earth
Times proportional to weight to reach earth
Times inversely proportional to weight to reach earth
None of these

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Machine Design
The connecting rod bolts are tightened up so that tightening stress

Is about yield point divided by safety factor
Is just sufficient to hold parts together
Is 50% of yield point
Approaches yield point

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Machine Design
In designing a connecting rod, it is considered like __________ for buckling about Y-axis.

Both ends fixed
One end fixed and the other end free
Both ends hinged
One end fixed and the other end hinged

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Machine Design
The included angle between the sides of V-belt is

38°
45°
40°
60°

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