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Engineering Mechanics

Engineering Mechanics
A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is

40
5
20
10

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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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Engineering Mechanics
The total energy possessed by a system of moving bodies

Varies from point to point
Is maximum in the start and minimum at the end
Is minimum in the start and maximum at the end
Is constant at every instant

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Engineering Mechanics
The velocity ratio of a differential wheel and axle with 'D' as the diameter of effort wheel and d1 and d2 as the diameters of larger and smaller axles respectively, is

D/(d₁ + d₂)
2D/(d₁ - d₂)
D/(d₁ - d₂)
2D/(d₁ + d₂)

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

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

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Engineering Mechanics
The law of motion involved in the recoil of gun is

Newton's third law of motion
Newton's first law of motion
Newton's second law of motion
None of these

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