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Machine Design

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

6
10
8
4

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Machine Design
When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is

A combination of bending stress and direct shear stress
A combination of torsional shear stress and bending
Direct shear stress only
Bending stress only

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Machine Design
For low and moderate speed engines, the cam follower should move with

Simple harmonic motion
Uniform velocity
Cycloidal motion
Uniform acceleration and retardation

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Machine Design
If a bearing is designated by the number 305, it means that the bearing is of

Medium series whose bore is 5 mm
Medium series whose bore is 25 mm
Light series whose bore is 5 mm
Light series whose bore is 25 mm

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Machine Design
Guest's theory of failure is applicable for following type of materials

Brittle
Plastic
Ductile
Elastic

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Machine Design
The ball bearings are provided with a cage

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

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