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Machine Design

Machine Design
According to I.B.R., the thickness of the boiler shell should not be less than

4 mm
7 mm
6 mm
5 mm

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Machine Design
In leaf springs, the longest leaf is known as

Master leaf
None of these
Upper leaf
Lower leaf

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Machine Design
If p = bearing pressure on projected bearing area, z = absolute viscosity of lubricant, and N = speed of journal, then the bearing characteristic number is given by

ZN/p
N/Zp
p/ZN
Z/pN

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Machine Design
Creep in belt is due to

Uneven extensions and contractions due to varying tension
All of these
Material of the belt
Material of the pulley

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Machine Design
The maximum bending stress in a curved beam having symmetrical section always occur at the

Centroidal axis
Outside fiber
Inside fiber
Neutral axis

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Machine Design
The coefficient of friction in belt drive depends upon

Belt velocity
Material of pulley
Material of belt
Materials of belt and pulley

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