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Machine Design

Machine Design
The edges of a boiler plate are bevelled to an angle of

60°
80°
30°
45°

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Machine Design
When compared to the rod of the same diameter and material, a wire rope

Is less flexible
Does not provide much warning before failure
Has a much smaller load carrying capacity
Provides much greater time for remedial action before failure

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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
6
8
4

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Machine Design
The ball bearings are provided with a cage

To maintain the balls at a fixed distance apart
To facilitate slipping of balls
To reduce friction
To prevent the lubricant from flowing out

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Machine Design
The function of the washer is to

Absorb shocks and vibrations
Provide cushioning effect
Provide bearing area
Fill up the axial gap

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Machine Design
The contact ratio for gears is

Zero
Less than one
Greater than one
None of these

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