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Machine Design

Machine Design
The helix angle for double helical gears may be made up to

45°
75°
60°
90°

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Machine Design
The distribution of the forces along the length of key fitted in a shaft

Varies exponentially, being less near the torque-input end
Is uniform throughout
Varies linearly
Varies exponentially, being more near the torque-input end

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Machine Design
A screw will be self locking, if

Friction angle is less than helix angle
Friction angle is equal to helix angle
Friction angle is more than helix angle
Efficiency of screw is 100%

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Machine Design
The railway carriage couplings have

Acme threads
Knuckle threads
Buttress threads
Square threads

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Machine Design
In skew bevel gearing, the axes of shafts are

None of these
Non-intersecting and nonparallel and the teeth are curved
Non-intersecting and non-parallel and the teeth are straight
Intersecting and the teeth are curved

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Machine Design
Stress concentration factor is defined as the ratio of

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

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MORE MCQ ON Machine Design

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