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Machine Design

Machine Design
The expansion joint is mostly used for pipes which carry steam at __________ pressures.

High
None of these
Medium
Low

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Machine Design
In nitrated parts, the origins of the fatigue cracks will occur at

Within the core
None of these
Surface
Just below the surface

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Machine Design
The cold working of metals is carried out __________ the recrystallization temperature.

Above
Below
At
None of these

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Machine Design
The efficiency of a riveted joint is equal to

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

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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

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

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Machine Design
Which of the following key is preferred for the condition when a large amount of impact type torque is to be transmitted in both direction of rotation?

Tangent key
Feather key
Gib-head key
Woodruff key

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