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Machine Design

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

Bolts and nuts
Studs
Headless taper bolts
None of these

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Machine Design
The contact ratio for gears is

Less than one
Greater than one
None of these
Zero

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Machine Design
The material commonly used for machine tool bodies is

Brass
Cast iron
Aluminium
Mild steel

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Machine Design
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If σt is the tensile stress for the shell material, then thickness of shell is equal to

pd/σt
pd/3σt
pd/2σt
pd/4σt

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Machine Design
The efficiency of a riveted joint is equal to

Ps /P
Pt /P
Pc /P
Least of Pt, Ps and Pc/P

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Machine Design
When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as

Crown bevel gears
Internal bevel gears
Angular bevel gears
Mitre gears

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