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Machine Design

Machine Design
The groove angle of pulleys for V-belt is

300 to 320
420 to 450
More than 400
340 to 360

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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/4σt
pd/σt
pd/2σt
pd/3σt

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Machine Design
According to I.B.R., the distance between the rows of rivets, for equal number of rivets in more than one row for lap joint or butt joint (chain riveting) shall not be less than

2.5 d
d
2 d
1.5 d

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Machine Design
In a horizontal flat belt drive, it is customary to use

Idler pulley
None of these
Top side of belt as slack side
Bottom side of belt as slack side

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Machine Design
A localized compressive stress at the area of contact between two members is known as

Shear stress
Tensile stress
Bending stress
Bearing stress

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Machine Design
A hot short metal is

Ductile at high temperature
Brittle when hot
Brittle when cold
Brittle under all conditions

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