Truck Test 10

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 10

2.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 10

3.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 10

4.Reservoirs need to be bled…?

Every other day

Every six hours

Every day

Every week

Correct! Wrong!

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Truck Test 10

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

65 psi

35 psi

45 psi

55 psi

Correct! Wrong!

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Truck Test 10

6.Which reservoir receives air directly from a compressor?

The supply reservoir

The secondary reservoir

The primary reservoir

All of these

Correct! Wrong!

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Truck Test 10

7.What colour is the trailer air supply knob?

Blue

Green

Yellow

Red

Correct! Wrong!

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Truck Test 10

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

The diaphragm

The slack adjuster

The pushrod

The camshaft

Correct! Wrong!

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Truck Test 10

9.What is the handbrake used for?

The service brakes on the semitrailer’s wheels

The service brakes on all wheels

The spring brakes on the tractor wheels

The spring brakes on all wheels

Correct! Wrong!

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Truck Test 10

10.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 10

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

Air travels into the brake chambers

The push rod moves forward

The brake shoes contact the drums

All these things happen simultaneously

Correct! Wrong!

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Truck Test 10

12.Airbrake systems are essentially made up of how many circuits?

Three

Four

Two

One

Correct! Wrong!

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Truck Test 10

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

Four

Three

Two

Five

Correct! Wrong!

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Truck Test 10

14.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 10

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

350°C

550°C

450°C

500°C

Correct! Wrong!

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Truck Test 10

16.Brake linings perform best at temperatures up to…?

300°C

350°C

200°C

250°C

Correct! Wrong!

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Truck Test 10

17.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 10

18.In drum brakes, what causes the friction which makes a vehicle slow and stop?

Pushrod pressing on the drum

Diaphragm pressing on the brake shoes

Springs pressing on the brake lining

Brake shoes pressing on the drum

Correct! Wrong!

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Truck Test 10

19.Which of these limits your braking capability?

The available air pressure

How hard you can press on the brake

How long the supply lines are

All of these

Correct! Wrong!

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Truck Test 10

20.What does the parking brake control do to the air in the vehicle's brake chamber?

Cools it

Releases it

Holds it as it is

Increases its pressure

Correct! Wrong!

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Truck Test 10

21.The brake linings can be found where?

On the S-cam

On the pushrod

On the brake drum

On the brake shoes

Correct! Wrong!

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Truck Test 10

22.When you receive a low air pressure warning, what should you do?

Report it to mechanics at the end of your shift

Drive slowly to the next scheduled stop

Pull over immediately

Pump the brakes to re-prime the system

Correct! Wrong!

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Truck Test 10

23.The truck parking brake control is what colour?

Yellow

Red

Blue

Green

Correct! Wrong!

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Truck Test 10

24.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 10

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

45°

60°

90°

120°

Correct! Wrong!

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Truck Test 10

26.Spring brakes are used for what?

Parking

Regular braking

Emergency

Parking and emergency

Correct! Wrong!

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Truck Test 10

27.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 10

28.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 10

29.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!

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Truck Test 10

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

Covered with plastic bags

Hooked to each other

Blocked off with rags

Sealed with grease

Correct! Wrong!

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Truck Test 10

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

3/4 inch

1 1/2 inch

1 inch

1/2 inch

Correct! Wrong!

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Truck Test 10

32.Supplemental brakes always work on which wheels?

The middle trailer wheels

The drive wheels

The offside wheels

The rear trailer wheels

Correct! Wrong!

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Truck Test 10

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

At the same speed

Any of these depending on age of vehicle

Faster

More slowly

Correct! Wrong!

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Truck Test 10

34.When you have adjusted the brake linings so that they hug the drum snugly, you should back the adjusting bolt off by…?

Two full turns

One quarter to one half a turn

Three quarters of a turn

One full turn

Correct! Wrong!

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Truck Test 10

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

Weekly

Daily

Monthly

Yearly

Correct! Wrong!

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Truck Test 10

36.An air brake system can go from a pressure loss to emergency braking within…?

A few seconds

A few dozen seconds

A few hours

A few minutes

Correct! Wrong!

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Truck Test 10

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

Broken line

Defective compressor

Valve failure

All of them

Correct! Wrong!

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Truck Test 10

38.When you double your speed, the amount of braking power required for the same stopping distance as your initial speed is…?

Halved

Trebled

Doubled

Quadrupled

Correct! Wrong!

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Truck Test 10

39.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 10

40.The only certain method of checking brake adjustment is what?

Measuring pushrod travel

Running stopping distance tests

Checking slack adjuster/push rod angle

Any of these

Correct! Wrong!

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Truck Test 10

41.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 10

42.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 10

43.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 10

44.Hydrodynamic retarders work using what?

Exhaust gases

Air pressure

Oil pressure

Magnetic resistance

Correct! Wrong!

Progress
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Truck Test 10

45.Brake fade is caused by what?

Under heating

Cold conditions

Overheating

Tired drivers

Correct! Wrong!

Progress
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Truck Test 10

1.The brake pressure gauge tells you what?

Progress 01/45

Truck Test 10

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

Progress 02/45

Truck Test 10

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

Progress 03/45

Truck Test 10

4.Reservoirs need to be bled…?

Progress 04/45

Truck Test 10

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

Progress 05/45

Truck Test 10

6.Which reservoir receives air directly from a compressor?

Progress 06/45

Truck Test 10

7.What colour is the trailer air supply knob?

Progress 07/45

Truck Test 10

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

Progress 08/45

Truck Test 10

9.What is the handbrake used for?

Progress 09/45

Truck Test 10

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

Progress 010/45

Truck Test 10

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

Progress 011/45

Truck Test 10

12.Airbrake systems are essentially made up of how many circuits?

Progress 012/45

Truck Test 10

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

Progress 013/45

Truck Test 10

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

Progress 014/45

Truck Test 10

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

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Truck Test 10

16.Brake linings perform best at temperatures up to…?

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Truck Test 10

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

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Truck Test 10

18.In drum brakes, what causes the friction which makes a vehicle slow and stop?

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Truck Test 10

19.Which of these limits your braking capability?

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Truck Test 10

20.What does the parking brake control do to the air in the vehicle's brake chamber?

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Truck Test 10

21.The brake linings can be found where?

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Truck Test 10

22.When you receive a low air pressure warning, what should you do?

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Truck Test 10

23.The truck parking brake control is what colour?

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Truck Test 10

24.The air compressor will only work if…?

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Truck Test 10

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

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Truck Test 10

26.Spring brakes are used for what?

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