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Machine Design

Machine Design
The diameter of the rivet hole is usually __________ the nominal diameter of the rivet.

Equal to
More than
None of these
Less than

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Machine Design
The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for

Reducing stress concentration
Safety
Ease of manufacture
Fullering and caulking

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Machine Design
Basic shaft is one

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

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Machine Design
The speed of the sprocket reduces as the chain pitch __________ for a given number of teeth.

Remain same
None of these
Increases
Decreases

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Machine Design
The maximum efficiency of a square threaded screw is

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

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Machine Design
The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to

0.75/ (0.75 + √v)
6/ (6 + v)
4.5/ (4.5 + v)
3/ (3 + v)

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