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Theory of Machine

Theory of Machine
The periodic time is given by (where ω = Angular velocity of the particle in rad/s)

ω × 2π
2π/ω
ω/2π
π/ω

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Theory of Machine
Which of the following would constitute a link?

Piston, crank pin and crank shaft
Piston and piston rod
Piston rod and cross head
Piston, piston rod and cross head

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Theory of Machine
What is the number of instantaneous centers for an eight link mechanism?

28
8
15
30

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Theory of Machine
For a kinematic chain to be considered as mechanism

None of the links should be fixed
There is no such criterion
Two links should be fixed
One link should be fixed

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Theory of Machine
The partial balancing of reciprocating parts in locomotives produces

All of these
Swaying couple
Hammer blow
Variation in tractive force along the line of stroke

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Theory of Machine
The fundamental equation for correct steering is (where φ and α = Angle through which the axis of the outer wheel and inner wheel turns respectively, c = Distance between the pivots of the front axles, and d = Wheel base)

cosφ - sinα = c/b
sinφ + sinα = b/c
tanφ + cotα = b/c
cotφ - cotα = c/b

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