Q. The instantaneous centres which vary with the configuration of mechanism, are called

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Q. The displacement of the reciprocating roller follower, when it has contact with the straight flanks of the tangent cam, is given by (where r1 = Minimum radius of the cam, r2 = Radius of the roller follower, and θ = Angle turned by the cam from the beginning of the follower displacement)

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Q. In considering friction of a V-thread, the virtual coefficient of friction (μ1) is given by

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Q. The wear of bearing is proportional to velocity and pressure.

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Q. The maximum or minimum value of the swaying couple is

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Q. For an involute gear, the ratio of base circle radius and pitch circle radius is equal to

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Q. A chain consisting of four links and four joints is called a kinematic chain.

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Q. Which of the following is an open pair?

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

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Q. In a shaper mechanism, the coriolis component of acceleration does not exist.

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Q. In a gear having involute teeth, the normal to the involute is a tangent to the

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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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