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Theory of Machine

Theory of Machine
Typewriter constitutes

Inversion
Structure
Mechanism
Machine

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

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

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Theory of Machine
A shaft has two heavy rotors mounted on it. The transverse natural frequencies, considering each of the rotor separately, are 100 Hz and 200 Hz respectively. The lowest critical speed is

9,360 r.p.m.
5,367 r.p.m.
12,000 r.p.m.
6,000 r.p.m.

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Theory of Machine
The pressure angle of a cam depends upon

All of these
Angle of ascent
Offset between center lines of cam and follower
Lift of follower

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Theory of Machine
The critical speed of a shaft with a disc supported in between is equal to the natural frequency of the system in

Transverse vibrations
All of these
Torsional vibrations
Longitudinal vibrations

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Theory of Machine
An eccentric sheave pivoted at one point rotates and transmits oscillatory motion to a link whose one end is pivoted and other end is connected to it. This mechanism has

2 links
4 links
5 links
3 links

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