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

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

As a reliable spring-applied parking brake

A storage for unused air pressure

A service-brake chamber

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

2 / 30

Under normal operating conditions the primary reservoir operates which brakes?

The driver's side of the service brakes

The rear service brakes

The front service brakes

All of the service brakes

3 / 30

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

The lowest pressure will be shut off

The lowest pressure will be directed to the delivery port

The higher pressure will be directed to the delivery port

The pressures will become blended

4 / 30

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

70 psi

40 psi

50 psi

60 psi

5 / 30

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

All of these

The size of vehicle

The type of vehicle

The vehicle make

6 / 30

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

To provide a more powerful flow of air

To prevent total brake failures

To supply air to the spring brakes

All of these

7 / 30

What is caging the brakes referred to as?

By locking the brakes and attempting to turn he wheels

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

Adding additional brake lining

None of these

8 / 30

Spring brakes consist of how many separate air chambers?

Three

Two

Four

One

9 / 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

10 / 30

What happens when you operate the park control valve?

Air builds up into the service reservoir

Air builds up into the brake chamber

Air remains in the air hoses

Air is exhausted from the spring hold-off cavity

11 / 30

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

Electronically release the brakes

Re-start the compressor

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

A heavy-duty tow

12 / 30

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

The return spring

The spring hold-off cavity

The diaphragm

The service push plate

13 / 30

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

Brake using service-brake pressure

Brake using spring-brake pressure

Nothing

Brake failure

14 / 30

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

Double duty

A piggyback

Tandem duty

A leapfrog

15 / 30

Spring brakes are a reliable parking brake because...

They are held on by spring pressure and require no air

They are larger than service brakes

They take less effort to apply

All of these

16 / 30

What is referred to as blended air?

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

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

When air in the supply tank blends with outside air

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

17 / 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

The spring-brake chamber

A warning gauge on the dashboard

A spring-brake modulator

18 / 30

At what pressure will the spring brakes apply?

50-65 psi

20-45 psi

70-80 psi

10-15 psi

19 / 30

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

Released before a foot brake application is made

Monitored

Fully released after a foot brake application is made

Applied half way

20 / 30

Where is an anti-compound line sometimes installed?

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

None of these

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

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

21 / 30

What is the purpose of an air pressure gauge?

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

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

22 / 30

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

To whichever tank has the lowest air pressure

Just the secondary reservoir

Just the primary reservoir

The primary reservoir and the secondary reservoir

23 / 30

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

On the furthest axle on the rear

On the driver's side

Any axle available

On the front tandem axle

24 / 30

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

A trained professional

The driver

All of these

The operator

25 / 30

When does compounding the brakes happen?

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

When half of the service brakes are working

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

26 / 30

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

10 psi

5 psi

20 psi

15 psi

27 / 30

How many functions does the trailer-supply valve have?

Three

Four

Two

One

28 / 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

29 / 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

A hex bolt

A wind-off bolt

The tighten bolt

30 / 30

What does the tractor protection system do?

It prevents air loss from the trailer while parked

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 loading a trailer

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

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Saskatchewan Air Brake Test 04

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