Section 11
1. In a suspension system with air, what is the use of the high pressure circuit:
It supplies air to the servo-mechanisms of the vehicle.
It maintains the pressure in the air springs steady.
It supplies additional air to, and increases the pressure in the air springs, when the car is being loaded, so as to maintain it steady.
2. The carbon monoxide (CO) is a pollutant contained mainly in combustion products of a:
Electric-engined car.
Petrol-engined car.
Diesel-engined car.
3. In a fully synchronized gear-box:
All gears change in a synchronized way, except for the reverse.
All gears change in a synchronized way, except for the first gear.
All gears change in a synchronized way.
4. How do pistons transfer the pressure created by the mixture explosion to the crankshaft?
With the help of the connecting rod.
Through the valve tappers.
Through the camshaft.
5. The aim of the connecting rod is:
To transfer the kinetic energy of the piston to the crankshaft.
To open and close the inlet and exhaust valve.
To connect the piston with the camshaft.
6. On a tyre 175/70 R 15 87T, size 15 indicates:
The external diameter of the tyre in inches.
The height of the tyre tread in inches.
The diameter of the wheel-rim in inches.
7. The sulphur dioxide (SO2) is a pollutant contained in combustion products of a:
Diesel-engined car.
Gas-driven car.
Petrol-engined car.
8. What does a four-stroke diesel-engine suck during induction stroke:
A mixture of diesel oil and air.
Only diesel oil.
Only air.
9. What is the aim of the central driving shaft, if the engine is in the front and the driving wheels are at the back?
To transfer the torque from the gear-box to the driving wheels.
To drive the front wheels.
To transfer the motion from the differential to the gear-box.
10. The oxidizing catalytic converter in buses:
Increases engine horsepower.
Reduces pollution emitted by the exhaust pipe.
Facilitates the exhaust gases outlet.
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