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Automobile Engineering Practice Test: Transmission System - Clutches, Gear Box, Universal Joints and Differential
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The transmission system in an automobile transfers the engine's power to the road wheels, propelling the vehicle forward.  The transmission system is made up of several components, including:  Clutch, Transmission gears, Differential, Final drive, Rear axle, Rear wheels, Gearbox, Propeller shafts, Axles.  The transmission system varies the engine's talk according to the driver's requirement. Here are some types of transmission systems: Manual transmission: The driver has to select the proper gear and engage or disengage the clutch. The transmission uses a flywheel, pressure plate and... Show more
Automobile Engineering Practice Test: Transmission System - Clutches, Gear Box, Universal Joints and Differential
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25 Questions

1. Why are the helical gears used commonly in transmission over spur gears?
2. Which of the following contains no linkage between the clutch and the pedal?
3. The axes of the two shafts are intersecting and are at 35° to each other. These two shafts are connected by Hook’s joint. At which position of the drives shaft acceleration will be maximum?
4. Where is the overdrive located?
5. External diameter of the clutch facing is limited to 120 mm and the inner diameter may be assumed to be 0.3 times the external diameter. Assume uniform wear theory. What is the effective mean radius?
6. What is the need of the universal joint?
7. Which types of joints are used when the shafts are inclined?
8. A two-piece propeller shaft requires one universal joint.
9. Why do the hypoid gears require special lubricant?
10. Which of the following is the coefficient of friction of the clutch plate?
11. The clutch plate has 160 mm inside and 240 mm outside diameter. The total force provided by the springs is 5 kN, when the clutch is new. The coefficient of friction is 0.4. What is the torque transmitted?
12. Which of the following parts of the cover assembly that hold the pressure plate against the clutch plate?
13. Where is the differential located?
14. Increase of torque in a vehicle is obtained by decreasing power.
15. The dry clutch can tolerate longer engagement time than a wet clutch.
16. The external radius of the cone clutch is 120 mm and the internal radius is 80 mm. The cone angle is kept at 20°. What is the effective mean radius assuming the uniform wear theory?
17. Which of the following is not part of automatic transmission?
18. Which of the following is the disadvantage of the cone clutch?
19. In which of the configuration of epicyclic gearbox output will be forward and fast output speed?
20. Which of the following is the need of the gearbox?
21. In which type of manual transmission the double-declutching is used?
22. In which of the gearbox sun and planet gear set is used?
23. Which types of gears are used in constant mesh gearbox?
24. If there are 7 clutch plates in a multi-plate clutch, what is the number of pair of contact surfaces?
25. Which of the following is the disadvantage of the open differential?

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