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Machine Design

Machine Design
The material used for brake lining should have __________ coefficient of friction.

Moderate
Low
High
None of these

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Machine Design
If the centre distance of the mating gears having involute teeth is increased, then the pressure angle

Decreases
Remains unchanged
None of these
Increases

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Machine Design
A saddle key __________ power through frictional resistance only.

Transmits
Either A or B
Does not transmit
None of these

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Machine Design
If P1 and P2 are the tight and slack side tensions in the belt, then the initial tension Pi (according to Barth) will be equal to (Where, Pc is centrifugal tension)

[(√P1 + √P2)/2]²
⅟₂× (P1 + P2)
[⅟₂ × (P1 + P2)] + Pc
P1 + P2

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Machine Design
If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will

Have same value as that of standard specimen
None of these
Decrease
Increase

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Machine Design
The velocity of sliding __________ the distance of the point of contact from the pitch point.

Does not depend upon
Is directly proportional to
Is inversely proportional to
Is equal to cos φ multiplied by

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