Saskatchewan Air Brake Test 04

Taking the time to study and practice your skills will undoubtedly pay off when it comes time to take the exam. And when you pass your official test with flying colors, you can be confident that you’re not only a skilled and knowledgeable driver but also a safe and responsible one. So, take advantage of the free resources available and give yourself the best possible chance for success.

1 / 30

If a failure occurs in the primary circuit and a brake application is made, control air from the secondary side of the foot valve is directed to where?

All of these

A warning gauge on the dashboard

A spring-brake modulator

The spring-brake chamber

2 / 30

What happens when you operate the park control valve?

Air builds up into the service reservoir

Air remains in the air hoses

Air is exhausted from the spring hold-off cavity

Air builds up into the brake chamber

3 / 30

What is the minimum pressure at which the tractor protection system must be activated?

20 psi

10 psi

15 psi

5 psi

4 / 30

Release of air in the spring-brake circuit causes the drive axle to do what?

Brake failure

Brake using spring-brake pressure

Nothing

Brake using service-brake pressure

5 / 30

What is the purpose of an air pressure gauge?

It informs the driver how much air pressure is in the supply line

It informs the driver how much air pressure is in the primary and secondary reservoirs

It informs the driver how much air pressure is being pumped by the compressor

It informs the driver how much air pressure is in the service line

6 / 30

What's the purpose of the dual-circuit air system?

To prevent total brake failures

To supply air to the spring brakes

To provide a more powerful flow of air

All of these

7 / 30

The rear chamber houses a large, powerful compression spring and diaphragm and performs emergency and parking functions, sometimes called...

A leapfrog

A piggyback

Double duty

Tandem duty

8 / 30

When does compounding the brakes happen?

When a service brake application is made with the park brake still applied

When the front service brakes are working but the rear are not

When the rear service brakes are working but the front are not

When half of the service brakes are working

9 / 30

Spring brakes are a reliable parking brake because...

They are larger than service brakes

All of these

They are held on by spring pressure and require no air

They take less effort to apply

10 / 30

Spring brakes consist of how many separate air chambers?

Four

Two

One

Three

11 / 30

A two-way check valve allows the source applying the higher pressure to shift the shuttle so that what happens?

The higher pressure will be directed to the delivery port

The lowest pressure will be directed to the delivery port

The pressures will become blended

The lowest pressure will be shut off

12 / 30

What makes up the tractor protection system?

None of these

The return spring and the trailer-supply valve

The trailer-supply valve and tractor protection valve

The slack adjuster and the tractor protection valve

13 / 30

To avoid compounding, the park brake should be...

Applied half way

Monitored

Fully released after a foot brake application is made

Released before a foot brake application is made

14 / 30

Where is an anti-compound line sometimes installed?

Behind the control side of the relay valve operating the spring brakes

None of these

Between the delivery side of the primary circuit relay valve and the control side of the relay valve operating the spring brakes

In front of the delivery side of the primary circuit relay valve

15 / 30

The only way the vehicle can be moved after all air is lost is to do what?

Repair the damaged circuit and recharge the system, or use the wind-off bolts to compress the power spring

Re-start the compressor

Electronically release the brakes

A heavy-duty tow

16 / 30

If air pressure cannot be restored in the service-brake chamber and it is necessary to move the vehicle, the power spring can be compressed manually by the use of...

None of these

The tighten bolt

A wind-off bolt

A hex bolt

17 / 30

How many functions does the trailer-supply valve have?

Two

Three

Four

One

18 / 30

Which statement is false? A spring-brake chamber functions as...

An emergency brake in case of air-pressure loss somewhere in the system

A storage for unused air pressure

A service-brake chamber

As a reliable spring-applied parking brake

19 / 30

What does the tractor protection system do?

It prevents air loss from the tractor when loading a trailer

It prevents air loss from the tractor when not hooked to a trailer or if a trailer breaks away

It prevents air loss from the tractor when hooked to a trailer

It prevents air loss from the trailer while parked

20 / 30

With a dual-circuit system, pressurized air moves from the supply reservoir to...

To whichever tank has the lowest air pressure

The primary reservoir and the secondary reservoir

Just the secondary reservoir

Just the primary reservoir

21 / 30

Under normal operating conditions the primary reservoir operates which brakes?

All of the service brakes

The front service brakes

The rear service brakes

The driver's side of the service brakes

22 / 30

During a controlled service brake application, air pressure enters the service port and acts upon the service diaphragm, which does what?

Forces the service push plate and rod backward

Forces the service push plate and rod forward, applying force to the slack adjuster

None of he above

Eases pressure from the slack adjuster

23 / 30

When you operate the park control valve, air is exhausted from where?

The return spring

The service push plate

The diaphragm

The spring hold-off cavity

24 / 30

At what pressure will the spring brakes apply?

10-15 psi

70-80 psi

20-45 psi

50-65 psi

25 / 30

Installation of parking brakes and piping arrangements into a vehicle air brake system will vary, depending on...

The size of vehicle

The type of vehicle

The vehicle make

All of these

26 / 30

Spring brakes are installed in the same manner as service brakes and are always installed where?

On the driver's side

On the furthest axle on the rear

On the front tandem axle

Any axle available

27 / 30

What is referred to as blended air?

When air within the air hoses moves back into the primary tanks

When air in the supply tank blends with outside air

When air taken from the primary and secondary circuits through a two-way check valve

When air from the compressor blends with air already in the supply tank

28 / 30

What is caging the brakes referred to as?

Adding additional brake lining

None of these

By using the wind-off bolts to compress the power spring

By locking the brakes and attempting to turn he wheels

29 / 30

All discarded spring-brake chambers must be disassembled and disposed of by whom?

The driver

A trained professional

The operator

All of these

30 / 30

The spring brake may begin to drag if the air pressure in the system falls below approximately what pressure?

40 psi

50 psi

60 psi

70 psi

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Saskatchewan Air Brake Test 04

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