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Machine Design

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

Finer
Very fine
Coarser
Same

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Machine Design
In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)

1 d
2 d
1.5 d
2.5 d

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Machine Design
The condition for maximum power transmission is that the maximum tension in the flat belt should be equal to (Where, Pc = tension in belt due to centrifugal force)

Pc/3
1 Pc
2 Pc
3 Pc

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Machine Design
When a metal or alloy is cold worked,

It is worked below recrystallization temperature
Both (A) and (B)
Its hardness and strength increases
None of these

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Machine Design
The rolling contact bearings as compared to sliding contact bearings have

Accuracy of shaft alignment
Low starting and low running friction except at very high speeds
All of these
Small overall dimensions

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Machine Design
The property of a material which enables it to resist fracture due to high impact loads is known as

Toughness
Endurance
Strength
Elasticity

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