Automobile Engineering problems
- 1. If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about
Options- A. 17:1
- B. 15:1
- C. 13:1
- D. 10:1 Discuss
Correct Answer: 10:1
- 2. Which of the following indicates a multigrade oil?
Options- A. SAE 30
- B. API SF
- C. SAE 20 W-50
- D. API 50 Discuss
Correct Answer: SAE 20 W-50
- 3. The main function of the tread pattern on tyre is that
Options- A. the tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating
- B. the crests between the tread grooves absorb road noise
- C. in wet conditions, the tread grooves expel water that is drawn between the tyre and road surface
- D. the tread pattern protects the tyre's inner carcass from small stones and pieces of glass Discuss
Correct Answer: in wet conditions, the tread grooves expel water that is drawn between the tyre and road surface
- 4. The function of an alternator in an automobile is to
Options- A. supply electric power
- B. convert mechanical energy into electrical energy
- C. continually recharge the battery
- D. partly convert engine power into electric power Discuss
Correct Answer: continually recharge the battery
- 5. The battery is an electrochemical device, which means battery
Options- A. makes chemicals by mechanical means
- B. uses chemical action to provide electricity
- C. has curved plates instead of flat plates
- D. does not use an electrolyte Discuss
Correct Answer: uses chemical action to provide electricity
- 6. The advantage of double-wishbone suspension design is that a large amount of freedom is available for setting geometry and precise settings can be made for driving comfort and steerability,
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 7. The cetane number of a Diesel fuel is a measure of
Options- A. volatility
- B. viscosity
- C. ignition quality
- D. delay peirod Discuss
Correct Answer: delay peirod
- 8. The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as
Options- A. indicator diagram
- B. axial force diagram
- C. valve timing diagram
- D. none of these Discuss
Correct Answer: valve timing diagram
- 9. In radial tyres
Options- A. one ply layer runs diagonally one way and another layer runs diagonally the other way
- B. all plies run parallel to one another and vertical to tyre bead
- C. inner tubes are always used
- D. none of these Discuss
Correct Answer: all plies run parallel to one another and vertical to tyre bead
- 10. The portion of a crankshaft which rests on cylinder block is called main journal.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
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