Q. The unbalanced primary forces in a reciprocating engine are

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Q. The balancing of a rigid rotor can be achieved by appropriately placing balancing masses in

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Q. The frictional torque transmitted in a conical pivot bearing with assumption of uniform pressure is __________ as compared to uniform wear.

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Q. In a cam drive with uniform velocity follower, the sharp corners of the displacement diagram are rounded off at the beginning and at the end of each stroke. This is done

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Q. In a steam engine, the earlier cut-off with a simple slide valve may be obtained by increasing the angle of advance of the eccentric but reducing the throw of the eccentric and keeping the steam lap and exhaust lap constant. This method will cause withdrawing or throttling of steam.

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Q. A governor is said to be stable, if the

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Q. In a Proell governor, the balls are attached to the extension of lower links.

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Q. The swaying couple is due to the

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Q. The lead screw of a lathe with nut forms a

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Q. In under damped vibrating system, if x1 and x2 are the successive values of the amplitude on the same side of the mean position, then the logarithmic decrement is equal to

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Q. The angle of the inclined plane at which the body just begins to slide down the plane, is called helix angle.

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Q. In forced vibrations, the magnitude of damping force at resonance is equal to the impressed force.

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Q. The displacement of the D-slide valve is __________ the steam lap by a distance known as lead of the valve.

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Q. For static balancing of a shaft, the net dynamic force acting on the shaft is equal to zero.

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Q. A spring controlled governor is said to be unstable, if the relation between the controlling force (Fc) and radius of rotation (r) is Fc = ar.

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Q. 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

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Q. When a rigid body is suspended vertically and it oscillates with a small amplitude under the action of the force of gravity, the body is known as

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Q. Longitudinal vibrations are said to occur when the particles of a body moves

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Q. The velocity of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by (where ω = Angular velocity of the cam shaft)

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Q. The sensitiveness of the governor __________ as the speed range decreases.

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