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Machine Design

Machine Design
The deflection of a cantilever beam under load W is 8. If its width is halved, then the deflection under load W will be

44045
44047
43869
43929

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Machine Design
For tight leakage joints, following type of thread is best suited

NPT (national pipe threads).
Square
Buttress
Metric

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Machine Design
Idler pulley is used for

Increasing velocity ratio
For applying tension
Changing the direction of motion of belt
All of these

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Machine Design
A screw is said to be over hauling screw, if its efficiency is

Less than 50%
None of these
Equal to 50%
More than 50%

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Machine Design
The included angle for the British standard whitworth thread is

55°
29°
47.5°
60°

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Machine Design
The number of slots in a 25 mm castle nut is

2
6
8
4

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