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Theory of Machine

Theory of Machine
In S.H.M., the velocity vector w.r.t. displacement vector

Leads by 180°
Leads by 90°
Are in phase
Lags by 90°

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Theory of Machine
Typewriter constitutes

Mechanism
Structure
Inversion
Machine

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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

2
1.5
1
0.5

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Theory of Machine
In a locomotive, the resultant unbalanced force due to the two cylinders along the line of stroke, is known as

Hammer blow
Swaying couple
None of these
Tractive force

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Theory of Machine
Which one of the following can completely balance several masses revolving in different planes on a shaft?

Two masses in any two planes
A single mass in different planes
A single mass in one of the planes of the revolving masses
Two equal masses in any two planes

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Theory of Machine
Which of the following is a turning pair?

Lead screw of a lathe with nut
Shaft with collars at both ends fitted into a circular hole
Piston and cylinder of a reciprocating steam engine
Ball and a socket joint

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