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Machine Design

Machine Design
Applications in which stresses are encountered in one direction only uses following type of threads

Acme
Metric
Buttress
Square

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Machine Design
The objective of caulking in a riveted joint is to make the joint

Free from stress
Leak-proof
Free from corrosion
Stronger in tension

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Machine Design
When two non-parallel or intersecting but coplanar shafts are connected by gears, the arrangement is known as,

Helical gearing
Bevel gearing
Worm gearing
None of these

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Machine Design
When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be _________ the bearing modulus.

15 times
5 times
10 times
20 times

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Machine Design
In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to

Increase the key width
Decrease the key length
Increase the key depth
Increase the key length

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Machine Design
For a shoe brake, the equivalent coefficient of friction is equal to (where μ = Actual coefficient of friction, and θ = Semi-block angle)

4μ sinθ/(2θ + sin 2θ)
2μ sinθ/(θ + sinθ)
4μ sinθ/(θ + sinθ)
μ sinθ/(2θ + sin 2θ)

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