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Machine Design

Machine Design
The allowable static stress for steel gears is approximately __________ of the ultimate tensile stress.

One-fourth
Double
One-third
One-half

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Machine Design
According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by

0.5 mm up to rivet diameter of 24 mm
2 mm for rivet diameter from 39 mm to 48 mm
All of these
1 mm for rivet diameter from 27 mm to 36 mm

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Machine Design
The wire ropes make contact at

Anywhere in the groove of the pulley
Bottom of groove of the pulley
Sides and bottom of groove of the pulley
Sides of groove of the pulley

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Machine Design
Whether any core is required in wire ropes

Yes
No
Sometimes
Rarely

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Machine Design
Gears are casted by

Slush casting
Permanent mould casting
Sand mould casting
Centrifugal casting

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Machine Design
Shear stress theory is applicable for

All of these
Ductile materials
Brittle materials
Elastic materials

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