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Machine Design

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

Metric
Buttress
NPT (national pipe threads).
Square

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Machine Design
The belt slip occurs due to

Heavy load
Driving pulley too small
Loose belt
Any one of the above

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Machine Design
The square threads are usually found on

Screw cutting lathes
Spindles of bench vices
Feed mechanism of machine tools
Railway carriage couplings

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Machine Design
In order to permit the thermal expansion/contraction of tubing, it should be

Flared
Crimped
Bent
Honed

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Machine Design
A machine part subjected to _________ is called a strut.

An axial compressive force
Any one of these
An axial tensile force
A tangential force

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Machine Design
When the screw in a mechanical screw jack rotates, the load kept on the top of it moves

Axially downwards
None of these
Axially upwards
Axially upwards or downwards

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