Q. In railway axle boxes, the bearing used is

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Q. The dynamic friction is the friction experienced by a body, when the body

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Q. The steering of a ship means

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Q. The tractive force in a locomotive with two cylinders is given by (where c = Fraction of reciprocating parts per cylinder, m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, and θ = Angle of inclination of crank to the line of stroke)

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Q. The radial distance of a tooth from the pitch circle to the bottom of the tooth is called

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Q. When the crank is at the inner dead centre, in a reciprocating steam engine, then the velocity of the piston will be

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Q. The frictional torque transmitted in a multi-collared shaft is same as that of a single collared shaft.

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Q. In order to give the primary balance of the reciprocating parts of a multi-cylinder in-line engines,

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Q. The gear train usually employed in clocks is a

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Q. A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is

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Q. When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a

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Q. The two elements of a pair are said to form a __________ when they permit relative motion between them.

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Q. When the axes of the shafts, over which the gears are mounted, move relative to a fixed axis, then the train is known as reverted gear train.

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Q. In under damped vibrating system, the amplitude of vibration

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Q. The ratio of the actual damping coefficient to the critical damping coefficient is called damping factor.

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Q. When a body moves with simple harmonic motion, the product of its periodic time and frequency is equal to

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Q. In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to

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Q. In a coupling rod of a locomotive, each of the four pairs is a __________ pair.

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Q. The sliding pairs, turning pairs and screw pairs form lower pairs.

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Q. When a particle moves round the circumference of a circle of radius r with ω rad/s, then its maximum acceleration is ω²r.

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