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Theory of Machine

Theory of Machine
The type of gears used to connect two non parallel and non intersecting shafts is

Helical gear
Spiral gear
Spur gear
Bevel gear

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Theory of Machine
The natural frequency of free torsional vibrations of a shaft is equal to (where q = Torsional stiffness of the shaft, and I = Mass moment of inertia of the disc attached at the end of a shaft)

2π qI
2π. √(q/I)
1/2π
(1/2π). √(q/I)

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Theory of Machine
The ratio of the number of teeth to the pitch circle diameter in millimeters, is called

Circular pitch
None of these
Diametral pitch
Module

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Theory of Machine
The rotor of a ship rotates in clockwise direction when viewed from stern and the ship takes a left turn. The effect of gyroscopic couple acting on it will be

To raise the stern and lower the bow
To raise the bow and stern
To raise the bow and lower the stern
To lower the bow and stern

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Theory of Machine
Which of the below are inversions of slider crank mechanism? 1. Oscillating cylinder engine mechanism 2. Toggle mechanism 3. Radial cylinder engine mechanism 4. Quick return mechanism

1, 2 and 4
2, 3 and 4
1, 3 and 4
1, 2 and 3

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Theory of Machine
The unbalanced primary forces in a reciprocating engine are

Balanced completely
Not balanced
Balanced partially
Balanced by secondary forces

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