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Machine Design

Machine Design
The helix angle for single helical gears ranges from

20° to 35°
35° to 50°
10° to 15°
15° to 20°

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Machine Design
Buttress threads are usually found on

Railway carriage couplings
Feed mechanisms
Spindles of bench vices
Screw cutting lathes

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Machine Design
When compared to the rod of the same diameter and material, a wire rope

Provides much greater time for remedial action before failure
Is less flexible
Has a much smaller load carrying capacity
Does not provide much warning before failure

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Machine Design
A coupling used to connect two perfectly aligned shafts, is

Flange coupling
Muff coupling
Compression coupling
All of these

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Machine Design
Antifriction bearings are

None of these
Sleeve bearings
Thin lubricated bearings
Hydrodynamic bearings

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Machine Design
Basic shaft is one

Does not exist
Whose upper deviation is zero
Whose lower as well as upper deviations are zero
Whose lower deviation is zero

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