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Machine Design

Machine Design
The shock resistance of steel is increased by adding

Nickel
Nickel and chromium
Cobalt and molybdenum
Chromium

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Machine Design
In a boundary lubricated bearing, there is a __________ of lubricant between the journal and the bearing.

Thin film
Thick film
None of these
Either A or B

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Machine Design
The centrifugal tension in the belt

Is equal to maximum tension on the belt
Increases the power transmitted
Has no effect on the power transmitted
Decreases the power transmitted

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

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

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

Finer
Coarser
Same
Very fine

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Machine Design
The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to

6/ (6 + v)
0.75/ (0.75 + √v)
3/ (3 + v)
4.5/ (4.5 + v)

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