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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

10
4
8
6

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Machine Design
The stress which vary from a minimum value to a maximum value of the same nature (i.e. tensile or compressive) is called

Repeated stress
Alternating stress
Fluctuating stress
Yield stress

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Machine Design
The following type of nut is used with alien bolt

Castle nut
Hexagonal nut
Slotted nut
Any one of the above

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Machine Design
A screw is said to be a self locking screw, if its efficiency is

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

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Machine Design
The maximum normal stress theory is used for

Non-ferrous materials
Ductile materials
Brittle materials
Plastic materials

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Machine Design
The velocity factor for very accurately cut and ground metallic gears operating at velocities upto __________ are equal to 6/(6 + v).

15 m/s
20 m/s
10 m/s
12.5 m/s

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