Engineering :: Theory of Machines

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241.

Which of the following road offers maximum resistance to automobiles?

A.	Wood paving	B.	Macadam
C.	Well rolled ground	D.	Loose sand

242.

The effect of creep in case of cross belt drive is

A.	to increase power transmission	B.	to increase the speed of driven pulley
C.	to reduce the speed of driven pulley	D.	None of the above

243.

Velocity of sliding between two mating gear surfaces can be defined as

A.	Sum of their angular velocities x distance between pitch point and point of contact.	B.	Sum of their angular velocities x distance between their centres of rotation.
C.	Sum of their angular velocities x difference between their pitch circle diameters	D.	None of these

244.

Radial distance from the top to the pitch circle for a tooth is known as

A.	working depth	B.	dedendum
C.	addendum	D.	None of the above

245.

In the gear box of an automobile, which gear train is used?

A.	Simple gear train	B.	Compound gear train
C.	Epicyclic gear train	D.	None of the above

246.

The swaying couple in a locomotive is due to

A.	unbalanced primary forces	B.	unbalanced secondary forces
C.	partial balancing	D.	None of the above

247.

Which of the following is a dead weight governor?

A.	Porter governer	B.	Hartness governer
C.	Watt governor	D.	None of the above

248.

Which one of the following is not a spring controlled governor?

A.	Porter governor	B.	Hartnell governor
C.	Pickering governor	D.	None of the above

249.

The engine of an aeroplane rotates in a clockwise direction when seen from the tail end and the aeroplane takes a turn torwards left. The effect of gyroscopic couple on aeroplane is

A.	to raise the nose and dip the tail	B.	to dip the nose and raise the tail
C.	to roll the aeroplane slightly in the clockwise direction when viewed from tail end	D.	None of the above

250.

The rotor of a ship rotates in anticlock wise direction when viewed from the bow end and the ship takes a left turn. The effect of gyroscopic couple on the ship is

A.	to lower the bow and raise the stern	B.	to raise the bow and lower then stern
C.	to roll the ship slightly clockwise when viewed fro bow end	D.	None of the above