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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)

2π/ω
π/ω
ω × 2π
ω/2π

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Theory of Machine
Which of the following disciplines provides study of inertia forces arising from the combined effect of the mass and the motion of the parts?

Kinetics
Mechanisms
Applied mechanics
Theory of machines

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Theory of Machine
In railway axle boxes, the bearing used is

Double row self aligning ball bearing
Double row spherical roller bearing
Cylindrical roller bearing
Deep groove ball bearing

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Theory of Machine
In a screw jack, the effort required to lower the load W is given by

P = W tan(φ - α)
P = W tan(α - φ)
P = W cos(α + φ)
P = W tan(α + φ)

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Theory of Machine
When two links are connected by a pin joint, their instantaneous center lies

At the center of curvature
At the pin joint
At the center of circle
On their point of contact

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Theory of Machine
The critical speed of a shaft depends upon its

Mass and stiffness
Stiffness
Mass
Stiffness and eccentricity

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