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Machine Design

Machine Design
When a load W is applied suddenly on a bar of cross-sectional area A, the stress induced in the bar will be

2W/A
W/A
3W/A
W/2A

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Machine Design
If the centre distance of the mating gears having involute teeth is varied within limits, the velocity ratio

Increases
None of these
Remains unchanged
Decreases

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Machine Design
The centrifugal tension in belts

Decreases the power transmitted
Increases the power transmitted
Increases the belt tension without increasing power transmission
Increase the wrap angle

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Machine Design
The pipe joint mostly used for pipes carrying water at low pressures is

Spigot and socket joint
Nipple joint
Union joint
Socket joint

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Machine Design
A metal pipe of 1 m diameter contains a fluid having a pressure of 1 N/mm². If the permissible tensile stress in the metal is 20 N/mm², then the thickness of the metal required for making the pipe will be

25 mm
10 mm
15 mm
5 mm

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Machine Design
The speed of the sprocket reduces as the chain pitch __________ for a given number of teeth.

None of these
Increases
Decreases
Remain same

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