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Theory of Machine

Theory of Machine
If ω/ωn = 2, where co is the frequency of excitation and ωn is the natural frequency of vibrations, then the transmissibility of vibration will the

1.5
2
0.5
1

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Theory of Machine
Davis steering gear consists of

Higher pairs
Sliding pairs
Rolling pairs
Turning pairs

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Theory of Machine
A body having moment of inertia o:m2 is rotating at 210 RPM and r with another body at rest having I 40 kg m2. The resultant speed after ing will be

80 RPM
data are insufficient
90 RPM
100 RPM

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Theory of Machine
The relative velocity of B with respect to A in a rigid link AB is

Perpendicular to AB
Along AB
Parallel to AB
At 45° to AB

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Theory of Machine
In a reciprocating engine, usually __________ of the reciprocating masses are balanced.

Two-third
One-half
Three-fourth
Whole

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Theory of Machine
The factional torque for square thread at the mean radius r while raising load W is given by

T = W.r tan(φ + α)
T = W.r tanα
T = W.r tan(φ - α)
T = W.r tanφ

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