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  • Question

  • 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.


  • Options
  • A. Correct
  • B. Incorrect

  • Correct Answer
  • Correct 

    • Automobile Engineering problems

    Search Results

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

    • Options
    • A. detonation
    • B. ignition
    • C. pre-ignition
    • D. rumble
      • Discuss
    • 2. If the level of tension in the belt is too high, it can result in a loss of power or in bending of the rotating shaft or crankshaft.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 3. The petrol engines are also known as

    • Options
    • A. spark ignition (S.I.) engines
    • B. compression ignition (C.I.) engines
    • C. steam engines
    • D. none of these
      • Discuss
    • 4. In automobiles G.V.W. refers to

    • Options
    • A. gross vehicle width
    • B. gross vehicle weight
    • C. gross vehicle wheel base
    • D. gross vehicle wheel track
      • Discuss
    • 5. In a ventilated disc brake,

    • Options
    • A. a duct directs air towards the caliper for cooling while the vehicle is moving
    • B. caliper is covered with cooling fins
    • C. disc contains many small holes for optimum cooling performance
    • D. disc contains radial vanes between its rubbing surfaces for optimum cooling performance
      • Discuss
    • 6. The difference between DOT 3 and DOT 4 brake fluids is

    • Options
    • A. DOT 4 fluid has a higher boiling point than DOT 3 fluid
    • B. DOT 4 fluid has a lower boiling point than DOT 3 fluid
    • C. DOT 3 and DOT 4 fluids have the same boiling point, but DOT 4 fluid has a longer service life
    • D. DOT 4 fluid is more resistant to freezing than DOT 3 fluid
      • Discuss
    • 7. The coefficient of friction for the clutch facing is approximately

    • Options
    • A. 0.1
    • B. 0.4
    • C. 0.8
    • D. 1.2
      • Discuss
    • 8. The component that connects the steering rack to the knuckles is

    • Options
    • A. tie-rod
    • B. sector gear
    • C. pivot
    • D. spline
      • Discuss
    • 9. 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
    • 10. 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

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