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

How many functions does the trailer-supply valve have?

Four

Three

Two

One

2 / 30

What is referred to as blended air?

When air in the supply tank blends with outside air

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

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

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

3 / 30

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

50 psi

60 psi

70 psi

40 psi

4 / 30

What does the tractor protection system do?

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 trailer while parked

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

It prevents air loss from the tractor when loading a trailer

5 / 30

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

The size of vehicle

The vehicle make

All of these

The type of vehicle

6 / 30

Where is an anti-compound line sometimes installed?

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

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

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

None of these

7 / 30

What is caging the brakes referred to as?

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

None of these

By locking the brakes and attempting to turn he wheels

Adding additional brake lining

8 / 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?

A spring-brake modulator

A warning gauge on the dashboard

The spring-brake chamber

All of these

9 / 30

Under normal operating conditions the primary reservoir operates which brakes?

The front service brakes

The driver's side of the service brakes

The rear service brakes

All of the service brakes

10 / 30

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

To prevent total brake failures

All of these

To supply air to the spring brakes

To provide a more powerful flow of air

11 / 30

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

Eases pressure from the slack adjuster

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

None of he above

Forces the service push plate and rod backward

12 / 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

Brake failure

Nothing

13 / 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 pressures will become blended

The higher pressure will be directed to the delivery port

14 / 30

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

A heavy-duty tow

Re-start the compressor

Electronically release the brakes

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

15 / 30

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

On the front tandem axle

On the driver's side

On the furthest axle on the rear

Any axle available

16 / 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 being pumped by the compressor

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

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

17 / 30

What happens when you operate the park control valve?

Air builds up into the brake chamber

Air is exhausted from the spring hold-off cavity

Air builds up into the service reservoir

Air remains in the air hoses

18 / 30

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

The driver

A trained professional

The operator

All of these

19 / 30

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

A storage for unused air pressure

As a reliable spring-applied parking brake

A service-brake chamber

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

20 / 30

What makes up the tractor protection system?

The return spring and the trailer-supply valve

None of these

The slack adjuster and the tractor protection valve

The trailer-supply valve and tractor protection valve

21 / 30

Spring brakes are a reliable parking brake because...

They take less effort to apply

They are held on by spring pressure and require no air

They are larger than service brakes

All of these

22 / 30

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

10 psi

20 psi

5 psi

15 psi

23 / 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...

The tighten bolt

None of these

A hex bolt

A wind-off bolt

24 / 30

Spring brakes consist of how many separate air chambers?

One

Four

Three

Two

25 / 30

When does compounding the brakes happen?

When half of the service brakes are working

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

26 / 30

At what pressure will the spring brakes apply?

70-80 psi

50-65 psi

20-45 psi

10-15 psi

27 / 30

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

Tandem duty

Double duty

A piggyback

A leapfrog

28 / 30

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

The primary reservoir and the secondary reservoir

Just the secondary reservoir

To whichever tank has the lowest air pressure

Just the primary reservoir

29 / 30

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

The return spring

The spring hold-off cavity

The service push plate

The diaphragm

30 / 30

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

Fully released after a foot brake application is made

Released before a foot brake application is made

Monitored

Applied half way

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Saskatchewan Air Brake Test 04

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