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

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

None of he above

Eases pressure from the slack adjuster

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

2 / 30

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

5 psi

20 psi

15 psi

10 psi

3 / 30

How many functions does the trailer-supply valve have?

Three

Four

One

Two

4 / 30

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

As a reliable spring-applied parking brake

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

A storage for unused air pressure

A service-brake chamber

5 / 30

Spring brakes consist of how many separate air chambers?

Three

One

Four

Two

6 / 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 pressures will become blended

The lowest pressure will be directed to the delivery port

The lowest pressure will be shut off

7 / 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...

A hex bolt

The tighten bolt

A wind-off bolt

None of these

8 / 30

What is the purpose of an air pressure gauge?

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 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 in the service line

9 / 30

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

Nothing

Brake using service-brake pressure

Brake using spring-brake pressure

Brake failure

10 / 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

11 / 30

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

The vehicle make

The type of vehicle

The size of vehicle

All of these

12 / 30

What happens when you operate the park control valve?

Air remains in the air hoses

Air builds up into the service reservoir

Air builds up into the brake chamber

Air is exhausted from the spring hold-off cavity

13 / 30

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

Applied half way

Fully released after a foot brake application is made

Monitored

Released before a foot brake application is made

14 / 30

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

To whichever tank has the lowest air pressure

Just the primary reservoir

The primary reservoir and the secondary reservoir

Just the secondary reservoir

15 / 30

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

The diaphragm

The return spring

The service push plate

The spring hold-off cavity

16 / 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

17 / 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

18 / 30

Spring brakes are a reliable parking brake because...

They are larger than service brakes

All of these

They take less effort to apply

They are held on by spring pressure and require no air

19 / 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

20 / 30

What makes up the tractor protection system?

The return spring and the trailer-supply valve

None of these

The trailer-supply valve and tractor protection valve

The slack adjuster and the tractor protection valve

21 / 30

What is referred to as blended air?

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

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

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

When air in the supply tank blends with outside air

22 / 30

At what pressure will the spring brakes apply?

10-15 psi

50-65 psi

70-80 psi

20-45 psi

23 / 30

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

On the front tandem axle

On the furthest axle on the rear

Any axle available

On the driver's side

24 / 30

Where is an anti-compound line sometimes installed?

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

None of these

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

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

25 / 30

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

A trained professional

The operator

All of these

The driver

26 / 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 loading a trailer

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

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

27 / 30

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

40 psi

60 psi

50 psi

70 psi

28 / 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

All of these

The spring-brake chamber

29 / 30

What is caging the brakes referred to as?

Adding additional brake lining

None of these

By locking the brakes and attempting to turn he wheels

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

30 / 30

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

To prevent total brake failures

All of these

To provide a more powerful flow of air

To supply air to the spring brakes

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Saskatchewan Air Brake Test 04

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