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


  • Options
  • A. 0.2 mm
  • B. 0.5 mm
  • C. 1 mm
  • D. 1.5 mm

  • Correct Answer
  • 1 mm 


  • Automobile Engineering problems


    Search Results


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

    • Options
    • A. 1-2-3-4
    • B. 1-3-4-2
    • C. 1-2-4-3
    • D. 1-3-2-4
    • Discuss
    • 2. A clutch is usually designed to transmit maximum torque which is

    • Options
    • A. equal to the maximum engine torque
    • B. 80 per cent of the maximum engine torque
    • C. 150 per cent of the maximum engine torque
    • D. none of these
    • Discuss
    • 3. Positive camber is used to compensate for wheels tilting inward due to the weight of the vehicle.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 4. Which of the following symptom is caused as a result of brake disc run out?

    • Options
    • A. Ineffectiveness of the brakes
    • B. Judder during braking
    • C. Localized wearing of the brake pads
    • D. Rapid wearing of the brake pads
    • Discuss
    • 5. The condition that causes vapour locking in a brake system is

    • Options
    • A. overheating of the fluid due to frequent brake application
    • B. overcooling of the brakes during high speed driving
    • C. keeping the vehicle without use for an extended period
    • D. an excessively high engine speed on a downhill road
    • Discuss
    • 6. The information provided by the oxygen (O2) sensor to the feedback control system is about the

    • Options
    • A. air-fuel ratio
    • B. air temperature
    • C. air flow speed
    • D. exhaust gas volume
    • Discuss
    • 7. The vehicle ride will be comfortable if

    • Options
    • A. unsprung mass is kept minimum
    • B. sprang mass is kept minimum
    • C. vehicle mass is kept minimum
    • D. all of these
    • Discuss
    • 8. If the engine coolant leaks into the engine oil, then engine oil

    • Options
    • A. appears milky
    • B. becomes foamy
    • C. turns black
    • D. none of these
    • Discuss
    • 9. The motion of the cam is transferred to the valves through

    • Options
    • A. pistons
    • B. rocker arms
    • C. camshaft pulley
    • D. valve stems
    • Discuss
    • 10. 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.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss


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