Automobile Engineering - Set 03 - ObjectiveBooks

Automobile Engineering - Set 03

Practice Test: Question Set - 03

1. The acid used in automobile battery is
    (A) Hydrochloric acid
    (B) Hydrofluoric acid
    (C) Nitric acid
    (D) Sulphuric acid

2. Highest useful compression ratio (HUCR) is the highest compression ratio at which the
    (A) Engine can run
    (B) Engine gives maximum output
    (C) Engine is most efficient
    (D) Fuel can be used in a test engine without knocking

3. A petrol engine of a car develops 125 Nm torque at 2700 r.p.m. The car is driven in second gear having gear ratio of 1.75. The final drive ratio is 4.11. If the overall transmission efficiency is 90%, then the torque available at the driving wheels is
    (A) 8.091 Nm
    (B) 80.91 Nm
    (C) 809.1 Nm
    (D) 8091 Nm

4. The air gap between the central electrode and ground (or side) electrode of a spark plug is around
    (A) 0.2 mm
    (B) 0.5 mm
    (C) 1 mm
    (D) 1.5 mm

5. A four cylinder engine has a capacity of 2.4 litres. The swept volume of one cylinder is
    (A) 400 cm³
    (B) 600 cm³
    (C) 1200 cm³
    (D) 2400 cm³

6. The positive plates of a lead acid battery has
    (A) Lead peroxide (PbO₂)
    (B) Spongy lead (Pb)
    (C) Lead sulphate (PbSO₄)
    (D) Sulphuric acid (H₂SO₄)

7. In comparison with a radial tyre, one advantage of a bias ply tyre is
    (A) Longer life
    (B) Lower rolling resistance
    (C) Smoother ride at low speeds
    (D) None of these

8. The main merit of a multi cylinder type cylinder sleeve is
    (A) Smaller engine dimensions
    (B) Better cooling efficiency
    (C) High rigidity
    (D) None of these

9. Thinner is added to the paint in order to
    (A) Make pigments and resin mix easily
    (B) Make paint film hard
    (C) Optimise its viscosity
    (D) None of these

10. When the battery is half (50%) charged, the specific gravity of acid in a battery is usually
    (A) 0.74
    (B) 1.00
    (C) 1.12
    (D) 1.19

11. The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as
    (A) Indicator diagram
    (B) Axial force diagram
    (C) Valve timing diagram
    (D) None of these

12. The tilting of the front wheels away from the vertical, when viewed from the front of the car, is called
    (A) Camber
    (B) Caster
    (C) Toe in
    (D) Toe out

13. The ball joints are used on the tie rod ends, because they
    (A) Reduce the amount of noise generated
    (B) Reduce the amount of sliding resistance
    (C) Can deal with movement of the suspension both vertically and in other directions
    (D) Improve the force transmission speed

14. In a petrol engine, the high voltage for spark plug is in the order of
    (A) 1000 volts
    (B) 2000 volts
    (C) 11 kilovolts
    (D) 22 kilovolts

15. For the same maximum pressure and temperature
    (A) Diesel cycle is more efficient than Otto cycle
    (B) Otto cycle is more efficient than Diesel cycle
    (C) Both Otto cycle and Diesel cycle are equally efficient
    (D) None of the above

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