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Machine Design

Machine Design
According to Indian standards, total numbers of tolerance grades are

18
20
12
8

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Machine Design
A tapered key which fits in a key way in the hub and is flat on the shaft, is known as

Flat saddle key
Feather key
Gib-head key
Wood ruff key

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Machine Design
The width of the pulley should be __________ width of the belt.

None of these
Greater than
Less than
Equal to

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Machine Design
Euler’s formula for a mild steel column is not valid if the slenderness ratio is

120
100
60
90

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Machine Design
In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

Would depend upon other factors
Increasing the cross-section area of bar
Decreasing the cross-section area of bar
Remain unaffected with cross-section area

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Machine Design
According to I.B.R., the efficiency of a triple riveted butt joint with double straps of unequal width (5 rivets per pitch length) should be

45 to 60%
80 to 90%
63 to 70%
70 to 83%

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