Truck Test 3

1.The brake pressure gauge tells you what?

The pressure at the brake pedal

The pressure in the brake lines

The pressure in the brake chambers

All of these

Correct! Wrong!

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Truck Test 3

2.When can the trailer handbrake be used as a parking brake?

For short periods

When in depot

Never

On level ground

Correct! Wrong!

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Truck Test 3

3.When you press the brake pedal in an air brake vehicle, what does it do?

Releases compressed air

Starts the compressor working

Directly applies the brakes

Opens the air exhaust ports

Correct! Wrong!

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Truck Test 3

4.Which reservoir receives air directly from a compressor?

The supply reservoir

The primary reservoir

The secondary reservoir

All of these

Correct! Wrong!

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Truck Test 3

5.Reservoirs need to be bled…?

Every other day

Every six hours

Every day

Every week

Correct! Wrong!

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Truck Test 3

6.The low air pressure indicator will always come on if the pressure drops below what level?

65 psi

55 psi

45 psi

35 psi

Correct! Wrong!

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Truck Test 3

7.You will not find spring brake actuators on…?

The front wheels of the tractor

The trailer wheels

The rear wheels of the tractor

Any of these

Correct! Wrong!

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Truck Test 3

8.When air is forced into the brake chamber, it acts directly on what?

The slack adjuster

The diaphragm

The pushrod

The camshaft

Correct! Wrong!

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Truck Test 3

9.What colour is the trailer air supply knob?

Green

Blue

Red

Yellow

Correct! Wrong!

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Truck Test 3

10.What is the handbrake used for?

The service brakes on the semitrailer’s wheels

The spring brakes on the tractor wheels

The service brakes on all wheels

The spring brakes on all wheels

Correct! Wrong!

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Truck Test 3

11.Brake linings lose all effectiveness at temperatures over…?

350°C

450°C

500°C

550°C

Correct! Wrong!

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Truck Test 3

12.In a braking sequence, after the driver presses down on the brake pedal, what happens?

The push rod moves forward

Air travels into the brake chambers

The brake shoes contact the drums

All these things happen simultaneously

Correct! Wrong!

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Truck Test 3

13.What is the big advantage that air brake systems have over hydraulic braking systems?

Greener

More powerful

Cheaper

All of these

Correct! Wrong!

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Truck Test 3

14.Heavy vehicles have a minimum of how many compressed air reservoirs?

Four

Three

Two

Five

Correct! Wrong!

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Truck Test 3

15.If your vehicle has an air purifier, you should still bleed the supply reservoir how often?

Every week

Every month

Every day

Every three days

Correct! Wrong!

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Truck Test 3

16.When checking brake adjustment, the air pressure gauge must read over what?

60 psi

120 psi

100 psi

80 psi

Correct! Wrong!

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Truck Test 3

17.If the weight of your load doubles the weight of your vehicle, the stopping distance for the same brake pressure will be…?

Halved

Doubled

Trebled

Quadrupled

Correct! Wrong!

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Truck Test 3

18.You're travelling at 90 km an hour and your brake system has a lag of half a second. How far will your vehicle travel in the time between you pressing the brake pedal and the brakes engaging?

18.5 m

6.5 m

14.5 m

12.5 m

Correct! Wrong!

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Truck Test 3

19.When the brakes are on, the angle between the slack adjuster and the pushrod should be what?

45°

60°

90°

120°

Correct! Wrong!

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Truck Test 3

20.In a manual transmission vehicle, the brakes should be checked with the transmission in what gear?

Neutral

Second

Third

First

Correct! Wrong!

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Truck Test 3

21.When using anti-lock brakes, you have to get used to…?

Holding the brake pedal to the floor

Pumping the brake pedal

Holding the brake pedal exactly half closed

Releasing the brake pedal completely

Correct! Wrong!

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Truck Test 3

22.When unloaded, a vehicle can stop in 20 m from 20 km/h. If the weight of the vehicle is doubled, how far will it need to stop from 40 km/h with the same brake pressure?

40 m

160 m

80 m

120 m

Correct! Wrong!

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Truck Test 3

23.The emergency brake will come on automatically when the air pressure in the service brake system drops below…?

55 psi

25 psi

35 psi

45 psi

Correct! Wrong!

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Truck Test 3

24.When adjusting brakes, the vehicle should…?

Have the engine off

Have the wheels chocked

Be on level ground

Fulfil all these conditions

Correct! Wrong!

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Truck Test 3

25.Which of these factors influence braking performance?

Road conditions

Vehicle aerodynamics

Brake adjustment

All of them

Correct! Wrong!

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Truck Test 3

26.Hydrodynamic retarders work using what?

Exhaust gases

Air pressure

Oil pressure

Magnetic resistance

Correct! Wrong!

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Truck Test 3

27.The emergency brakes can be activated by doing what?

Pulling the handbrake

Pumping the brake pedal

Pulling out the parking brake control

Pushing in the parking brake control

Correct! Wrong!

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Truck Test 3

28.When checking brake adjustments, you should check…?

All wheels

At least the frontmost and rearmost wheels

At least six of the wheels

At least half the wheels

Correct! Wrong!

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Truck Test 3

29.Brake fade is caused by what?

Under heating

Cold conditions

Overheating

Tired drivers

Correct! Wrong!

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Truck Test 3

30.Which of these lessens the effect of brake lag?

Two-way valves

One-way valves

Relay valves

Governor valves

Correct! Wrong!

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Truck Test 3

31.Retarders and engine brakes will not work until…?

You release the accelerator

You turn off the engine

You apply the emergency brake

You press the brake

Correct! Wrong!

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Truck Test 3

32.Which of these can cause a drop in air pressure?

Broken line

Valve failure

Defective compressor

All of them

Correct! Wrong!

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Truck Test 3

33.If your brakes have automatic slack adjusters, they have to be checked…?

Weekly

Daily

Monthly

Yearly

Correct! Wrong!

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Truck Test 3

34.Compared to hydraulic brakes, air brakes react…?

At the same speed

Faster

More slowly

Any of these depending on age of vehicle

Correct! Wrong!

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Truck Test 3

35.Supplemental brakes always work on which wheels?

The middle trailer wheels

The offside wheels

The drive wheels

The rear trailer wheels

Correct! Wrong!

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Truck Test 3

36.To keep brake hose couplers clean when not in use, they can be hooked up to dummy couplers or…?

Hooked to each other

Covered with plastic bags

Blocked off with rags

Sealed with grease

Correct! Wrong!

Progress
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Truck Test 3

37.If an air compressor begins filling the service reservoirs when their pressure drops below 105 psi, it will stop filling them when they reach what level?

110 psi

115 psi

120 psi

125 psi

Correct! Wrong!

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Truck Test 3

38.Brakes need adjusting if the pushrod travel is more than what?

1 inch

3/4 inch

1 1/2 inch

1/2 inch

Correct! Wrong!

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Truck Test 3

39.The air pressure gauge tells you what?

The air pressure in the service reservoirs

The air pressure in the supply lines

The average air pressure across the system

The air pressure in the brake chambers

Correct! Wrong!

Progress
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Truck Test 3

40.Air brakes are now fitted on almost all vehicles weighing over…?

4000 kg

3000 kg

5000 kg

2000 kg

Correct! Wrong!

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Truck Test 3

41.The air compressor will only work if…?

The vehicle is in motion

The engine is running

At least one of these applies

The ignition is switched on

Correct! Wrong!

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Truck Test 3

42.Spring brakes are used for what?

Parking

Regular braking

Parking and emergency

Emergency

Correct! Wrong!

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Truck Test 3

43.When connecting brake hose couplers, they should be held together at…?

45°

60°

120°

90°

Correct! Wrong!

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Truck Test 3

44.In which of the below scenarios would a driver not be permitted to extend his or her hours of driving time?

An unexpected thunderstorm hits the region and delays what is usually a simple trip to complete under normal driving conditions

The driver is caught in the usual traffic jam that congests roads at 16:00

The driver of a tow truck must tow a vehicle on a public road that is 120km from the home terminal

The driver and his passengers need to travel an extra distance in order to find a safe place to stop during an emergency

Correct! Wrong!

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Truck Test 3

45.If a driver elects to drive for 15 hours in one shift and defer two hours of off-duty time to the next day and, what is the maximum number of hours he or she can drive the next day?

9 hours

11 hours

13 hours

7 hours

Correct! Wrong!

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Truck Test 3

1.The brake pressure gauge tells you what?

Progress 01/45

Truck Test 3

2.When can the trailer handbrake be used as a parking brake?

Progress 02/45

Truck Test 3

3.When you press the brake pedal in an air brake vehicle, what does it do?

Progress 03/45

Truck Test 3

4.Which reservoir receives air directly from a compressor?

Progress 04/45

Truck Test 3

5.Reservoirs need to be bled…?

Progress 05/45

Truck Test 3

6.The low air pressure indicator will always come on if the pressure drops below what level?

Progress 06/45

Truck Test 3

7.You will not find spring brake actuators on…?

Progress 07/45

Truck Test 3

8.When air is forced into the brake chamber, it acts directly on what?

Progress 08/45

Truck Test 3

9.What colour is the trailer air supply knob?

Progress 09/45

Truck Test 3

10.What is the handbrake used for?

Progress 010/45

Truck Test 3

11.Brake linings lose all effectiveness at temperatures over…?

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Truck Test 3

12.In a braking sequence, after the driver presses down on the brake pedal, what happens?

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Truck Test 3

13.What is the big advantage that air brake systems have over hydraulic braking systems?

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Truck Test 3

14.Heavy vehicles have a minimum of how many compressed air reservoirs?

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Truck Test 3

15.If your vehicle has an air purifier, you should still bleed the supply reservoir how often?

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Truck Test 3

16.When checking brake adjustment, the air pressure gauge must read over what?

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Truck Test 3

17.If the weight of your load doubles the weight of your vehicle, the stopping distance for the same brake pressure will be…?

Progress 017/45

Truck Test 3

18.You're travelling at 90 km an hour and your brake system has a lag of half a second. How far will your vehicle travel in the time between you pressing the brake pedal and the brakes engaging?

Progress 018/45

Truck Test 3

19.When the brakes are on, the angle between the slack adjuster and the pushrod should be what?

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Truck Test 3

20.In a manual transmission vehicle, the brakes should be checked with the transmission in what gear?

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Truck Test 3

21.When using anti-lock brakes, you have to get used to…?

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Truck Test 3

22.When unloaded, a vehicle can stop in 20 m from 20 km/h. If the weight of the vehicle is doubled, how far will it need to stop from 40 km/h with the same brake pressure?

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Truck Test 3

23.The emergency brake will come on automatically when the air pressure in the service brake system drops below…?

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Truck Test 3

24.When adjusting brakes, the vehicle should…?

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Truck Test 3

25.Which of these factors influence braking performance?

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26.Hydrodynamic retarders work using what?

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