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Machine Design

Machine Design
In a flange coupling, the flanges are coupled together by means of

None of these
Bolts and nuts
Studs
Headless taper bolts

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Machine Design
Stress concentration factor is defined as the ratio of

Maximum stress to the nominal stress
Maximum stress to the endurance limit
Nominal stress to the endurance limit
Nominal stress to the maximum stress

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Machine Design
The maximum efficiency of a square threaded screw is

(1 + sinφ)/ (1 - sinφ)
(1 - sinφ)/ (1 + sinφ)
(1 + cosφ)/ (1 - sinφ)
(1 - sinφ)/ (1 + cosφ)

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Machine Design
The included angle in unified of American National threads is

29°
60°
55°
47°

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Machine Design
In helical gears, the right hand helixes on one gear will mesh __________ helixes on the other gear.

Right hand
Both A and B
Left hand
None of these

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

Internal expanding brake
Band and block brake
Shoe brake
Band brake

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