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Engineering Mechanics

Engineering Mechanics
A smooth cylinder lying on a __________ is in neutral equilibrium.

Curved surface
Horizontal surface
None of these
Convex surface

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Engineering Mechanics
If the gravitational acceleration at any place is doubled, then the weight of a body will be

√2.g
2g
g/2
g

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Engineering Mechanics
If u₁ and u₂ are the velocities of two moving bodies in the same direction before impact and v₁ and v₂ are their velocities after impact, then coefficient of restitution is given by

(v₂ - v₁)/(u₁ - u₂)
(u₁ - u₂)/(v₁ - v₂)
(u₂ + u₁)/(v₂ + v₁)
(v₁ - v₂)/(u₁ - u₂)

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Engineering Mechanics
From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the centre of circular plate

2.5 cm
0.5 cm
1.5 cm
1.0 cm

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

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

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Engineering Mechanics
A machine having an efficiency greater than 50%, is known as

Reversible machine
Ideal machine
Non-reversible machine
Neither reversible nor non-reversible machine

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MORE MCQ ON Engineering Mechanics

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