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Machine Design

Machine Design
The gears are termed as medium velocity gears, if their peripheral velocity is

15-30 m/s
3-15 m/s
1-3 m/s
30-50 m/s

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Machine Design
According to Indian standards, a bolt thread of 6 mm size of coarse pitch and with allowance on the threads and normal tolerance grade is designated as

M8
M8 - 6d
M6 - 8d
M6

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Machine Design
When compared to the rod of the same diameter and material, a wire rope

Has a much smaller load carrying capacity
Provides much greater time for remedial action before failure
Is less flexible
Does not provide much warning before failure

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Machine Design
The washer is generally specified by its

Thickness
Mean diameter
Outer diameter
Hole diameter

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Machine Design
Which of the following is not correct procedure to increase the fatigue limit?

Surface decarburisation
Under stressing
Cold working
Shot peening

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Machine Design
The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called

Face width
Backlash
Working depth
Clearance

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