Which of the following statement is correct with regard to a hydraulic control unit?
A. The various hydraulic signals are converted into electric signals and are used to operate each gear's magnet clutch so that gearshift operations can be performed
B. The volume of fluid within the torque converter is adjusted so that the efficiency of transfer of engine power to the transmission can be controlled
C. The unit's flow channels are switched in response to a number of different hydraulic signals so that the pressure directed to each of the gear's clutches be controlled and so that gearshift operation can be performed
D. The hydraulic pressure which is applied to the gear unit is regulated to achieve the same effect as achieved by engagement and disengagement of the clutch in a manual transmission
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The purpose of torque converter in automobile is
A. Automatically multiplying engine torque
B. Automatically multiplying engine speed
C. Automatically control the speed of engine
D. Automatically multiplying vehicle torque
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Torsional coil springs used in automotive clutch plate
A. Ensure smooth engagement of clutch assembly
B. Damp engine torsional vibrations
C. Are provided for applying axial force on the pressure plate
D. Do not provide damping at all
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The double declutching is used for the engagement of gears in
A. Sliding mesh transmission
B. Constant mesh transmission
C. Synchromesh transmission
D. None of these
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When the speed of governor increases, then
A. Height of governor and radius of rotation increase
B. Height of governor and radius of rotation decrease
C. Height of governor decreases but radius of rotation increases
D. Height of governor increases but radius of rotation decreases
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Double declutching is required in constant mesh transmission to
A. Equalize the speed of main shaft gear and the sliding dog
B. Provide direct gear
C. Equalize the speed of conutershaft gear and the sliding dog
D. None of these
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In a torque converter, when the speed ratio of the pump and turbine reaches the coupling point, then
A. The stator will begin to freewheel in the opposite direction to the pump and the turbine
B. The stator will begin to freewheel in the same direction as the pump and the turbine
C. The lock-up clutch will be engaged
D. The pump and the turbine will be engaged in a mechanical fashion
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The trouble noisy differential is due to-
A. Loose star pinion
B. Wrong out hub bearing
C. Both of them
D. None of the above
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Following is the data for transmission system of a Gear box reduction ratios.
1st gear - 4.3 : 1
2nd gear - 3.00 : 1
3rd gear - 2.71 : 1
4th gear - 1 : 1
Final drive reduction is 5.0 : 1
The overall reduction when the vehicle is driven in 2nd gear is
A. 3.00 : 1
B. 13.55 : 1
C. 5 : 1
D. 15 : 1
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The constant velocity joint with two cross and yoke V-joints mounted back to back with a linking yoke and a centering ball is called as
A. Final drive
B. Double carbon
C. Both A and B
D. None of these
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When the rear wheels are jacked up and gears are in neutral, turning one rear wheel of the rear drive in anticlockwise direction, will cause the other to
A. Turn in clockwise direction
B. Turn in anticlockwise direction
C. Turn in either direction
D. Remain stationary
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What is attached to the ring gear?
A. Differential gages
B. Gear box
C. Front axle
D. All are correct
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Which of the following is the function of differential mechanism?
A. To keep both the rear wheels at the same speed in straight travel
B. To make outer rear wheel to rotate faster than the inner one
C. Both of them
D. None of them
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The synchronizer hub is attached with main shaft through
A. Synchronizer key
B. Shift fork
C. Synchronizer ring
D. Splines inside the hub
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The power transmitted by belt drive will be maximum, if the maximum tension in the belt is
A. Twice the tension in the slack side
B. Equal to the tension in the slack side
C. Three times the tension due to centrifugal force
D. Equal to the tension due to centrifugal force
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The automatic transmission requires use of the following control pedals:
A. Acceleration and clutch pedals
B. Clutch and brake pedals
C. Acceleration and brake pedals
D. Clutch, brake and acceleration pedals
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The purpose of the sliding joint in a propeller shaft is to
A. Adjust the distance between gear box and differential
B. Avoid whirling motion of propeller shaft
C. Transfer power from gear box and differential
D. Allow easy disassembly of the propeller shaft for repairs
Select an option to see the answer and solution.
Which one of the following gear box type uses friction cones to equalize the speed of the gears before engagement?
A. Sliding mesh
B. Epicyclic
C. Crash type
D. Synchromesh
Select an option to see the answer and solution.
In case of a flywheel, maximum fluctuation in energy is
A. Sum of maximum and minimum energies
B. Difference of maximum and minimum energies
C. Rratio of maximum and minimum energies
D. Ratio of minimum and maximum energies
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If the tractive effort is the highest for a given velocity, then the vehicle must be in
A. Top gear
B. Third gear
C. Second gear
D. First gear
Select an option to see the answer and solution.