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Machine Design

Machine Design
The bearings of medium series have capacity __________ over the light series.

30 to 40%
10 to 20%
20 to 30%
40 to 50%

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Machine Design
The dynamic tooth load is due to

Deflections of teeth under load
Irregularities in tooth profiles
Inaccuracies of tooth spacing
All of these

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Machine Design
The product of the diametral pitch and circular pitch is equal to

π
π × number of teeth
1
1/π

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Machine Design
When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)

(4WD/ πd3) × K
(2WD/ πd3) × K
(WD/ πd3) × K
(8WD/ πd3) × K

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Machine Design
Brittle coating technique is used for

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

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Machine Design
The face angle of a bevel gear is equal to

Pitch angle + addendum angle
Pitch angle + dedendum angle
Pitch angle - dedendum angle
Pitch angle - addendum angle

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