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Engineering Mechanics

Engineering Mechanics
The matter contained in a body, is called

Impulsive force
Momentum
Mass
Weight

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Engineering Mechanics
A body of weight 'W' is required to move up on rough inclined plane whose angle of inclination with the horizontal is 'α'. The effort applied parallel to the plane is given by (where μ = tanφ = Coefficient of friction between the plane and the body.)

P = W (cosα + μsinα)
P = W tanα
P = W (sinα + μcosα)
P = W tan (α + φ)

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

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

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Engineering Mechanics
The frequency of oscillation of a compound pendulum is (where kG = Radius of gyration about the centroidal axis, and h = Distance between the point of suspension and C.G. of the body.)

2π. √(gh/kG² + h²)
1/2π. √(kG² + h²/gh)
1/2π. √(gh/kG² + h²)
2π. √(kG² + h²/gh)

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Engineering Mechanics
The rate of doing work is known as

Power
Potential energy
None of these
Kinetic energy

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Engineering Mechanics
The efficiency of a lifting machine is the ratio of

Output to the input
Mechanical advantage to the velocity ratio
Work done by the machine to the work done on the machine
All of these

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MORE MCQ ON Engineering Mechanics

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