Quiz -1

What is meant by an idle gear?

• Gears between driver and driven gears

• Gears used when driver and driven gears move in same direction

• Both a. and b.

• None of the above

In which type of gear trains, shaft axes which are mounted by gear wheels have relative motion between them?

• Compounded gear train

• Simple gear train

• Epicyclic gear train

• Reverted gear train

In which of the following type of gear train the first gear and the last gear are co-axial.

• Simple gear train

• Compound gear train

• Reverted gear train

• None of the mentioned

Gearing contact is which one of the following?

• Sliding contact

• Sliding contact, only rolling at pitch point

• Rolling contact

• Rolling and sliding at each point of contact

In gears, interference takes place when

• The tip of a tooth of a mating gear digs into the portion between base and root circles

• Gears do not move smoothly in the absence of lubrication

• Pitch of the gear is not same

• Gear teeth are undercut

When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the _________pulley must be taken into consideration.

• smaller

• larger

• medium

• none of the mentioned

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

• the broken belt only

• all the belts

• the broken belt and the belts on either side of it

• none of the mentioned

Creep in belt drive is due to

• weak material of the belt

• weak material of the pulley

• uneven extensions and contractions of the belt when it passes from tight side to slack side

• expansion of the belt

The wire ropes make contact at

• bottom of groove of the pulley

• sides of groove of the pulley

• sides and bottom of groove of the pulley

• any where in the groove of the pulley

The disadvantages of the V-belt drive over flat belt drive are

• The V-belt drive cannot be used with large centre distances.

• The V-belts are not so durable as flat belts.

• The construction of pulleys for V-belts is more complicated than pulleys for flat belts.

• all of the mentioned