Q. When a shaking force is transmitted through the springs, damping becomes detrimental when the ratio of its frequency to the natural frequency is greater than

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Q. When the nature of contact between the elements of a pair is such that it can turn or revolve about a fixed axis, the pair is known as a rolling pair.

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Q. Creep in belt drive is due to

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Q. Which of the following statement is wrong?

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Q. A watt's governor can work satisfactorily at speeds from

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Q. The displacement of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by (where R = Radius of flank, r1 = Minimum radius of the cam, and θ = Angle turned through by the cam)

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Q. The contact ratio is the ratio of

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Q. An exact straight line motion mechanism is a

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Q. A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by (where μ = tan φ = Coefficient of friction between the plane and the body)

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Q. In vibration isolation system, if ω/ωn > 2, then for all values of damping factor, the trans-missibility (i.e. the ratio of the force transmitted to the force applied) will be less than unity.

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Q. The acceleration of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by

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Q. In a four bar chain or quadric cycle chain

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

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Q. The example of successfully constrained motion is a

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Q. Which one of the following can completely balance several masses revolving in different planes on a shaft?

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Q. The essential condition of placing the two masses, so that the system becomes dynamically equivalent, is (where l1 and l2 = Distance of two masses from the centre of gravity of the body, and kG = Radius of gyration of the body)

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Q. A Porter governor is a

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Q. The secondary 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. A type-writer constitutes a machine.

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Q. Due to slip of belt, the velocity ratio of the belt drive increases.

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