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Machine Design

Machine Design
The static tooth load should be __________ the dynamic load.

None of these
Equal to
Less than
Greater than

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Machine Design
The minimum number of teeth on the pinion which will mesh with any gear without interference for 20° full depth involute teeth will be

18
12
14
24

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Machine Design
For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be

10
4
8
6

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Machine Design
The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover joints, is calculated by the relation (where d = Nominal diameter of bolt in mm)

2080 d
2840 d
1420 d
1680 d

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Machine Design
The resistance to fatigue of a material is measured by

Endurance limit
Ultimate tensile strength
Elastic limit
Young's modulus

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Machine Design
A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is

Less than 1/10
Equal to 1/10
Greater than 1/10
None of these

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