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Engineering Mechanics

Engineering Mechanics
The resultant of two forces P and Q (such that P > Q) acting along the same straight line, but in opposite direction, is given by

P + Q
P / Q
P - Q
Q / P

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Engineering Mechanics
The resultant of two equal forces ‘P’ making an angle ‘θ’, is given by

2P cotθ/2
2P cosθ/2
2P sinθ/2
2P tanθ/2

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Engineering Mechanics
For a self locking machine, the efficiency must be

Less than 50%
Greater than 50%
1
Equal to 50%

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Engineering Mechanics
The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as

Static friction
Limiting friction
Coefficient of friction
Dynamic friction

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Engineering Mechanics
The velocity ratio of a single purchase crab winch can be increased by

Increasing the number of teeth of the pinion
Increasing the radius of the load drum
All of these
Increasing the length of the handle

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Engineering Mechanics
The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is

D - d
D × d
D / d
D + d

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MORE MCQ ON Engineering Mechanics

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