Q. A body is said to be under forced vibrations, when

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Q. The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body, and δ = Static deflection of the body)

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Q. The radius of a friction circle for a shaft rotating inside a bearing is (where r = Radius of shaft, and tan φ = Coefficient of friction between the shaft and bearing)

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Q. The frictional torque transmitted in a flat pivot bearing, considering uniform wear, is (where μ = Coefficient of friction, W = Load over the bearing, and R = Radius of bearing surface)

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Q. If the damping factor for a vibrating system is unity, then the system will be

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Q. In vibration isolation system, if ω/ωn < 2, then for all values of damping factor, the trans-missibility will be (where ω = Angular speed of the system, ωn = Natural frequency of vibration of the system)

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Q. When a point at the end of a link moves with constant angular velocity, its acceleration will have

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Q. The time taken by a particle for one complete oscillationis known as periodic time.

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Q. The danger of breakage and vibration is maximum

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Q. The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the lengm of connecting rod to radius of crank)

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Q. For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given fractional change in speed. It indicates that

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Q. The component of the acceleration, parallel to the velocity of the particle, at the given instant is called

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Q. In a multiple V-belt drive, if one of the belt is broken, then we should replace

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Q. Most of the engines, generally, do not require balancing of secondary forces and couples.

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Q. The secondary unbalanced force is maximum __________ in one revolution of the crank.

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Q. A spring controlled governor is found unstable. It can be made stable by

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Q. In order to have a good grip on the pulley, the V-belt should touch the bottom of the groove in the pulley.

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Q. In order to double the period of a simple pendulum, the length of the string should be

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Q. When a slider moves on a fixed link having curved surface, their instantaneous centre lies

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Q. Scotch yoke mechanism is used to generate

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