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Theory of Machine

Theory of Machine
In Meyer's expansion valve, the main valve is driven by an eccentric having an angle of advance from

30°-40°
15°-25°
25°-30°
10°-15°

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Theory of Machine
When a body moves with simple harmonic motion, the product of its periodic time and frequency is equal to

Zero
One
π/2
π

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Theory of Machine
In a pantograph, all the pairs are

Sliding pairs
Turning pairs
Spherical pairs
Self-closed pairs

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Theory of Machine
The minimum periodic time of a compound pendulum is

2π. √(kG/g)
(1/2π). √(kG/g)
(1/2π). √(2kG/g)
2π. √(2kG/g)

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Theory of Machine
The balancing of a rigid rotor can be achieved by appropriately placing balancing masses in

Three planes
Two planes
A single plane
Four planes

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Theory of Machine
If two moving elements have surface contact in motion, such pair is known as

Surface pair
Higher pair
Sliding pair
Rolling pair

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