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Machine Design

Machine Design
According to Indian standards, total numbers of fundamental deviations are

10
20
25
15

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Machine Design
For crank shaft bearings, the ratio of the length of the journal to its diameter is_________.

Less than unity
Equal to 1
Greater than unity
None of these

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Machine Design
A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as,

None of these
Hollow key
Soft key
Hollow saddle key

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Machine Design
The shear plane in case of bolts should

Be across threaded portion of shank
Be parallel to axis of bolt
Be normal to threaded portion of shank
Never be across the threaded portion

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Machine Design
In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to

Increase the key depth
Increase the key width
Increase the key length
Decrease the key length

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Machine Design
Tensile strength of a mild steel specimen can be roughly predicted from following hardness test

None of these
Rockwell
Brinell
Vickers

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