Q. A rigid body, under the action of external forces, can be replaced by two masses placed at a fixed distance apart. The two masses form an equivalent dynamical system, if

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Q. When two pulleys are connected by means of a cross belt drive, then both the pulleys will rotate in __________ directions.

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Q. The pitching of a ship produces forces on the bearings which act __________ to the motion of the ship.

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Q. At the node, the shaft remains unaffected by the vibration.

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Q. The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω1 rad/s in the clockwise direction and the link OB turns with angular velocity ω2 rad/s in the anti-clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

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Q. When the two elements of a pair have __________ when in motion, it is said to a lower pair.

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Q. The sensitiveness of a governor depends upon the lift of the sleeve.

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Q. The ratio of maximum fluctuation of energy to the workdone per cycle is called

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Q. In a steam engine, the earlier cut-off with a simple slide valve may be obtained by increasing the steam lap and the angle of advance of the eccentric but keeping constant the travel and lead of the valve, This method will

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Q. The centre of suspension and centre of percussion are not interchangeable.

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Q. The size of cam depends upon

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Q. In an open pair, the two elements of a pair

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Q. The frictional torque transmitted in a flat collar bearing, considering uniform pressure, is (where r1 and r2 = External and internal radii of collar respectively)

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Q. Efficiency of a screw jack is given by

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Q. The ratio of the driving tensions for V-belts is __________ times that of flat belts. (where β = Semi-angle of the groove)

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Q. The secondary unbalanced force is __________ the primary unbalanced force.

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Q. The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism, because

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Q. The two links are said to have a pure rolling contact, when their instantaneous centre __________ on their point of contact.

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Q. One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by (where δ = Deflection of the spring)

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Q. The brake commonly used in motor cars is internal expanding brake.

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