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Machine Design

Machine Design
The efficiency of a riveted joint is equal to

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

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Machine Design
Two helical springs of the same material and of equal circular cross-section, length and number of turns, but having radii 80 mm and 40 mm, kept concentrically (smaller radius spring within the larger radius spring), are compressed between two parallel planes with a load W. The inner spring will carry a load equal to

W/9
2W/3
W/2
8W/9

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Machine Design
Brittle coating technique is used for

Protecting metal against wear and tear
Experimental stress analysis
Determining brittleness
Protecting metal against corrosion

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Machine Design
Auto frettage is the method of

Calculating stresses in thick cylinders
Joining thick cylinders
Pre-stressing thick cylinders
Increasing the life of thick cylinders

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Machine Design
In testing a material for endurance strength, it is subjected to

Dynamic load
Completely reversed load
Static load
Impact load

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Machine Design
A hollow shaft will transmit a __________ torque than a solid shaft of the same mass and same material.

Medium
Greater
Smaller
None of these

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