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Machine Design

Machine Design
The efficiency of a riveted joint is equal to

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

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

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

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Machine Design
Which of the following is not correct procedure to increase the fatigue limit?

Cold working
Shot peening
Surface decarburisation
Under stressing

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Machine Design
When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as

Crown bevel gears
Mitre gears
Angular bevel gears
Internal bevel gears

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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

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

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Machine Design
The property of a material which enables it to resist fracture due to high impact loads is known as

Toughness
Endurance
Strength
Elasticity

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