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Mechanical Engineering :: Automobile Engineering

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

  2. A.
    air-fuel ratio
    B.
    air temperature
    C.
    air flow speed
    D.
    exhaust gas volume

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

  4. A.
    indicator diagram
    B.
    axial force diagram
    C.
    valve timing diagram
    D.
    none of these

  5. The difference between DOT 3 and DOT 4 brake fluids is

  6. 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

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

  8. 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

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

  10. A.
    trapping
    B.
    tapping
    C.
    bleeding
    D.
    cleaning

  11. The aluminium alloy is used in cylinder blocks because

  12. A.
    it is lighter and have good heat dissipation characteristics
    B.
    material cost is low
    C.
    it does not require any cylinder liners
    D.
    the piston is also made of aluminium alloy

  13. 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.

  14. A.
    Correct
    B.
    Incorrect

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

  16. A.
    camber
    B.
    caster
    C.
    toe-in
    D.
    toe-out

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

  18. 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

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

  20. A.
    it makes petrol engines lighter
    B.
    higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition
    C.
    less compression ratio gives better performance
    D.
    it is just customary to have less compression ratio in petrol engines