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Machine Design

Machine Design
The contact ratio for gears is

None of these
Less than one
Greater than one
Zero

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Machine Design
The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is

0.1 micron
10 microns
1 micron
0.01 micron

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Machine Design
In unilateral system of tolerance, the tolerance is allowed on

One side of the nominal size
Both sides of the actual size
Both sides of the nominal size
One side of the actual size

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Machine Design
A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is

Less than 1/10
Equal to 1/10
Greater than 1/10
None of these

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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
Fullering and caulking
Safety
Ease of manufacture

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

Shoe brake
Band brake
Band and block brake
Internal expanding brake

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