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Machine Design

Machine Design
A bench vice has following type of threads

Metric
Buttress
Acme
Square

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Machine Design
An open coiled helical compression spring 'A' of mean diameter 50 mm is subjected to an axial load ‘W’. Another spring 'B' of mean diameter 25 mm is similar to spring 'A' in all respects. The deflection of spring 'B' will be __________ as compared to spring 'A'.

One-eighth
Double
One-half
One-fourth

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Machine Design
A type of brake commonly used in motor cars is a

Internal expanding brake
Shoe brake
Band brake
Band and block brake

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Machine Design
The taper on a rectangular sunk key is

1 in 100
1 in 48
1 in 16
1 in 32

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Machine Design
The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is

4
2
1
43832

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Machine Design
Multiple threads are used to secure

High efficiency
High mechanical advantage
Low efficiency
High load lifting capacity

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