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Machine Design

Machine Design
The contact ratio for gears is

None of these
Less than one
Greater than one
Zero

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Machine Design
A screw is said to be over hauling screw, if its efficiency is

None of these
Equal to 50%
More than 50%
Less than 50%

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Machine Design
Antifriction bearings are

Hydrodynamic bearings
Sleeve bearings
Thin lubricated bearings
None of these

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Machine Design
In leaf springs, the longest leaf is known as

Lower leaf
Upper leaf
None of these
Master leaf

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Machine Design
In a marine flange coupling, the pitch circle diameter of bolts is taken as

2 d
1.2 d
2.5 d
1.6 d

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Machine Design
The building up of worn and undersized parts, subjected to repeated loads by electroplating is

Extremely hazardous
Cheapest method
Has no effect as regards fatigue strength
Best method

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