Automobile Engineering MCQ Mechanical Engineering

Attempt now to check your rank among 37 students! 50 Questions 30 Mins

About Automobile Engineering

Automobiles are one of the most important inventions in human history, and it's important to have a basic understanding of how they work. Automobile engineering is the study of designing, developing, manufacturing, and testing vehicles. It includes a wide range of topics such as thermodynamics, heat transfer, materials science, mechanics, and electronics. Automobile engineers can work in many different fields, including design, development, manufacturing, testing, and marketing.

An internal combustion engine is a type of heat engine that converts chemical energy into mechanical energy. The most common type of internal combustion engine is the gasoline engine, which is used in cars and trucks. Other types of internal combustion engines include diesel engines, jet engines, and rocket engines.

Automobiles work by converting energy into motion. The most common type of automobile is the car, which uses an internal combustion engine to convert gasoline into motion. Automobiles also use other types of engines, such as electric motors and steam engines.

Wrapping Up

Automobile engineering is a complex and fascinating field. There are many different types of automobiles, and each one has its own unique features. If you're interested in learning more about automobile engineering, be sure to check out our Automobile Engineering MCQ course.

Following are some of the multiple choice questions on the Automobile Engineering with answers that will help the students in developing their knowledge.

Automobile Engineering MCQ

1. The drive-shafts are connected to the differential and wheel hubs through universal joints because the universal joints

  • Absorb the vibrations transferred from the surface of the road
  • Compensate for variations in the relative positions of the differential and the wheels which result from bumpy road surfaces or other similar driving conditions.
  • Absorb any difference in speed between the left and right wheels when the vehicle is turning
  • None of the above

2. The power source for a brake booster is

  • Exhaust manifold pressure
  • Electricity
  • The pressure difference between the atmospheric pressure and the vacuum pressure in the intake manifold
  • Hydraulic pump

3. The function of anti-lock brake system (ABS) is that is

  • Reduces the stopping distance
  • Minimizes the brake fade
  • Maintains directional control during braking by preventing the wheels from locking
  • Prevents nose dives during braking and thereby postpones locking of the wheels

4. If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about

  • 17:1
  • 15:1
  • 13:1
  • 10:1

5. The firing order for an in-line four cylinder I.C. engine is

  • 1-2-3-4
  • 1-3-4-2
  • 1-2-4-3
  • 1-3-2-4

6. The condition that causes vapour locking in a brake system is

  • Overheating of the fluid due to frequent brake application
  • Overcooling of the brakes during high speed driving
  • Keeping the vehicle without use for an extended period
  • An excessively high engine speed on a downhill road

7. The Diesel engines are also known as

  • Spark ignition (S.I.) engines
  • Compression ignition (I.) engines
  • Steam engines
  • None of these

8. What type of bearing is used for main bearings and connecting rod bearings ?

  • Ballbearings
  • Plain bearings
  • Needle roller bearing
  • Taper roller bearing

9. Which of the following indicates a multigrade oil ?

  • SAE 30
  • API SF
  • SAE 20 W-50
  • API 50

10. Incorrect steering axis inclination (S.A.I.) causes

  • tendency to assume toe-out orientation
  • generation of a braking effect at tight corners
  • poor recovery of the steering wheel after making a turn
  • the vehicle to pull to the side of lesser inclination

11. The petrol engines are also known as

  • Spark ignition (S.I.) engines
  • Compression ignition (I.) engines
  • Steam engines
  • None of these

12. Highest useful compression ratio (HUCR) is the highest compression ratio at which the

  • Engine can run
  • Engine gives maximum output
  • Engine is most efficient
  • Fuel can be used in a test engine without knocking

13. When the battery is half (50%) charged, the specific gravity of acid in a battery is usually

  • 0.74
  • 1.00
  • 1.12
  • 1.19

14. In a unit type body (frameless body) design, the sheet metal parts are welded together, forming a frame work to which outer skin is attached.

  • True
  • False

15. Positive camber is used to compensate for wheels tilting inward due to the weight of the vehicle.

  • Yes
  • No

16. The main function of intake manifold is that it

  • promotes the mixture of air and fuel
  • reduces intake noise
  • cools the intake air to a suitable temperature
  • distributes intake air equally to the cylinders

17. The main cause for the change in engine oil viscosity is

  • Humidity
  • Temperature
  • Vibration
  • Contamination

18. Which of the following indicates multi-grade oil?

  • SAE 30
  • API SF
  • SAE20 W50
  • API 50

19. Which of the following oil is more viscous?

  • SAE 30
  • SAE 40
  • SAE 70
  • SAE 80

20. Wheel base of a vehicle is the

  • Distance between the centres of the front and rear wheels
  • Distance between the centres of the front tyres
  • Distance between the centres of the rear tyres
  • Extreme length of the vehicle

21. When turning a corner

  • The front wheels are toeing out
  • The front wheels are turning on different angles
  • The inside front wheels has a greater angle than the outside wheel
  • All of the above

22. A traction control system (TCS) in automobiles controls the

  • vibrations on the steering wheel
  • engine power during acceleration
  • torque that is transmitted by the tyres to the road surface
  • stopping distance in case of emergency

23. The device for smoothening out the power impulses from the engine is called

  • Clutch
  • Differential
  • Flywheel
  • Torque converter

24. The component that connects the steering rack to the knuckles is

  • tie-rod
  • sector gear
  • pivot
  • spline

25. The cetane number of a Diesel fuel is a measure of

  • volatility
  • viscosity
  • ignition quality
  • delay peirod

26. The air gap between the central electrode and ground (or side) electrode of a spark plug is around

  • 0.2 mm
  • 0.5 mm
  • 1 mm
  • 1.5 mm

27. The cetane rating of Diesel fuel is in the order of

  • 25
  • 45
  • 70
  • 90

28. The most commonly used supplementary restraint system (SRS) component is

  • seat belt
  • brake
  • airbag
  • steering

29. The tilting of the front wheels away from the vertical, when viewed from the front of the car, is called

  • camber
  • caster
  • toe-in
  • toe-out

30. The compression ratio in petrol engine is kept less than in Diesel engine because

  • it makes petrol engines lighter
  • higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition
  • less compression ratio gives better performance
  • it is just customary to have less compression ratio in petrol engines

31. The main function of the tread pattern on tyre is that

  • the tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating
  • the crests between the tread grooves absorb road noise
  • in wet conditions, the tread grooves expel water that is drawn between the tyre and road surface
  • the tread pattern protects the tyre's inner carcass from small stones and pieces of glass

32. In a fuel injection system, the electronic control module (ECM) calculates the optimum fuel-injection volume for the engine condition based on the data received from the sensors, and injects this volume of fuel into the intake manifold at the optimum timing.

  • Correct
  • Incorrect

33. The battery is an electrochemical device, which means battery

  • makes chemicals by mechanical means
  • uses chemical action to provide electricity
  • has curved plates instead of flat plates
  • does not use an electrolyte

34. The operation of removing trapped air from the hydraulic braking system is known as

  • trapping
  • tapping
  • bleeding
  • cleaning

35. The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as

  • indicator diagram
  • axial force diagram
  • valve timing diagram
  • none of these

36. The information provided by the oxygen (O2) sensor to the feedback control system is about the

  • air-fuel ratio
  • air temperature
  • air flow speed
  • exhaust gas volume

37. The co-efficient of rolling resistance for a truck weighing 63 500 N is 0.018. The rolling resistance to the truck is

  • 1.143 N
  • 11.43 N
  • 114.3 N
  • 1143 N

38. If the air-fuel mixture ignites before the spark takes place at spark plug, the condition is called

  • detonation
  • ignition
  • pre-ignition
  • rumble

39. 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,

  • Correct
  • Incorrect

40. In a ventilated disc brake,

  • a duct directs air towards the caliper for cooling while the vehicle is moving
  • caliper is covered with cooling fins
  • disc contains many small holes for optimum cooling performance
  • disc contains radial vanes between its rubbing surfaces for optimum cooling performance

41. The vehicle ride will be comfortable if

  • unsprung mass is kept minimum
  • sprang mass is kept minimum
  • vehicle mass is kept minimum
  • all of these

42. The flywheel and the pressure plate bind the clutch disc between them so that the engine and the transmission can be engaged.

  • Yes
  • No

43. In a spark plug, when the temperature of the central electrode exceeds a certain temperature, any carbon that has adhered will be burnt off, and the temperature at which this burning off carbon starts is referred to as the self cleaning temperature.

  • Correct
  • Incorrect

44. In radial tyres

  • one ply layer runs diagonally one way and another layer runs diagonally the other way
  • all plies run parallel to one another and vertical to tyre bead
  • inner tubes are always used
  • none of these

45. It is necessary to maintain the valve clearances as they

  • reduce the resistance to sliding that occurs between the cam and the tappet
  • allow for lengthening of the valves owing to the heat of combustion
  • increase the speed at which the valves move up and down
  • make the crankshaft turn smoothly

46. It is necessary to maintain the valve clearances as they

  • reduce the resistance to sliding that occurs between the cam and the tappet
  • allow for lengthening of the valves owing to the heat of combustion
  • increase the speed at which the valves move up and down
  • make the crankshaft turn smoothly

47. A baffle plate is fitted inside the oil pan to prevent the oil from splashing when it is subjected to vibration and other movement during vehicle operation.

  • True
  • False

48. The portion of a crankshaft which rests on cylinder block is called main journal.

  • Yes
  • No

49. The function of a governor in automobiles is to

  • Limit the power
  • Limit the vehicle speed
  • Maintain constant engine speed
  • Maximise the fuel economy

50. The main task of a battery in automobiles is to

  • Supply electricity to the alternator
  • Act as a reservoir or stabilizer of electricity
  • Supply electricity to the vehicle's electrical system at all times while the engine is running
  • Supply a large amount of power to turn the starter motor when the engine is being started

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