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Machine Design

Machine Design
Belt slip may occur due to

Driving pulley too small
All of these
Heavy load
Loose belt

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Machine Design
When two springs are in series (having stiffness K), the equivalent stiffness will be

K
K/4
K/2
2K

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Machine Design
In worm gears, the pressure angle is __________ the angle between two inclined faces in axial plane.

Half
None of these
Thrice
Twice

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Machine Design
The acme threads are usually found on

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

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Machine Design
For circumferential joint in boilers, the type of joint used is

Any one of the above
Butt joint with double cover plate
Lap joint with one ring overlapping the other
Butt joint with single cover plate

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Machine Design
Pick up wrong statement. Fatigue strength can be increased by

Cold working
Hot working
Shot peening
Grinding and lapping surface

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