Gear Drive MCQ

If for a power transmission, a gear train consisting of 12 gears is used, then the motion of the driver and follower will be in the

  1. Same direction
  2. Opposite direction
  3. Both a and b
  4. None of these
Answer
Answer. b

The gear train usually employed in clocks is

  1. Reverted gear train
  2. Simple gear train
  3. Sun and planet gear
  4. Differential gear
Answer
Answer. a

Gear drive is _________ than belt drive in power transmission.

  1. more efficient
  2. less efficient
  3. equally efficient
  4. none of the above
Answer
Answer. a

Gear box in a car consists at

  1. Compound train
  2. Simple train
  3. Epicyclic train
  4. None
Answer
Answer. a

Which gear train is usually employed in clocks?

  1. Simple gear train
  2. Sun and Planet gear
  3. Differential gear
  4. Reverted gear train
Answer
Answer. d

In a compound gear train there is

  1. only one gear on each shaft
  2. more than one gear on a shaft
  3. no gear on driving shaft
  4. none of these
Answer
Answer. b

Which type of gear train is used in watches & lathe machine

  1. Simple gear train
  2. Compound gear train
  3. Reverted gear train
  4. Epi-cyclic gear train
Answer
Answer. c

If the axis of driver & driven gears are same then such gear train is known as

  1. Simple gear train
  2. Compound gear train
  3. Reverted gear train
  4. Epi-cyclic gear train
Answer
Answer. c

In a reverted gear train, the axes of the first and last gear are

  1. Parallel
  2. Co-axial
  3. Skew
  4. Neither parallel nor axial
Answer
Answer. b

The mechanism which consists of a driver gear, idler or intermediate gear and driven gear is known as

  1. thread chasing
  2. simple gear train
  3. compound gear train
  4. tumbler gear mechanism
Answer
Answer. b

Clock is an application of

  1. simple gear train
  2. compounded gear train
  3. reverted gear train
  4. epicyclic gear train
Answer
Answer. c

How does an auto rickshaw takes a sharp turn?

  1. It has a differential mechanism
  2. The tyres slip during turns
  3. Power is transmitted to only one of the wheels
  4. None of these
Answer
Answer. c

The speed of universal motor is generally reduced by using

  1. gear trains
  2. V-belts
  3. brakes
  4. chains
Answer
Answer. a

Which of the following is CORRECT for the speed ratio of a gear train?

  1. Speed of driver/speed of driven
  2. Speed of driven/speed of driver
  3. Number of teeth on driver/number of teeth on driven
  4. None of these
Answer
Answer. a

Which of the following is CORRECT for the train value of a gear train?

  1. Speed of driver/speed of driven
  2. Speed of driven/speed of driver
  3. Number of teeth on driven/number of teeth on driver
  4. None of these
Answer
Answer. b

___________ is used to transmit power from drive shaft to the driven shaft.

  1. Coupling
  2. Shaft
  3. Belt
  4. Pulley
Answer
Answer. a

In a simple Gear Train, Driver has 50 teeth and Follower has 30 teeth. Movement ratio is

  1. 1.67
  2. 0.6
  3. 80
  4. 20
Answer
Answer. b

Two mating spur gears have 40 and 120 teeth respectively. The pinion transmits a torque of 20 Nm rotating at 1200 rpm. The Torque transmitted by the gear is

  1. 20 Nm
  2. 6.6 Nm
  3. 60 Nm
  4. 40 Nm
Answer
Answer. c

In a clock mechanism, the gear train used to connect minute hand to hour hand is

  1. Simple gear train
  2. Sun and Planet gear
  3. Differential gear
  4. Reverted gear train
Answer
Answer. d

Two gears are said to have a conjugate motion if

  1. they have a very small fluctuating angular velocity
  2. they have variable anguląr velocity
  3. they have constant angular velocity
  4. they have very high fluctuating angular velocity
Answer
Answer. c

Which of the following toothed wheels does not come under the classification according to the type of gearing?

  1. External gearing
  2. Internal gearing
  3. Rack and pinion
  4. Parallel gearing
Answer
Answer. d

A simple gear train has three gear wheels. The first gear has 20 teeth, second gear has 10 teeth and the third gear 40 teeth. The speed ratio of third gear to first gear and the direction are respectively

  1. 2 and opposite direction
  2. 2 and same direction
  3. 1/2 and opposite direction
  4. 1/2 and same direction
Answer
Answer. b
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