BC Air Brake Practice Test 04

It is crucial to familiarize oneself with the inspection requirements and procedures, as well as the braking and stopping distances for different vehicles. Being knowledgeable in these areas will not only enhance one’s chances of passing the test but also contribute to a safer driving experience. So, with dedication and a comprehensive approach, obtaining a BC air brake endorsement will not be an insurmountable task.

BC Air Brake Test 04

1 / 30

Spring parking brakes are mounted on which axles?

Drive axles

Trailer axles

Rear axles only

Steering axles

2 / 30

What's the purpose of the supply line?

None of the above

It supplies the trailer reservoirs with air at full tractor reservoir pressure

It attaches to the foot valve

It brings air into the compressor

3 / 30

What is the only major item of the air brake system not found on a trailer air system that is on the tractor's system?

Foundation brakes

Air compressor

Air chambers

Air reservoirs

4 / 30

Some tractor protection systems will shut off immediately in a breakaway, but some will do what?

Allow tractor pressure to drop to as low as 20 psi before shutting off

Allow tractor pressure to drop to as low as 5 psi before shutting off

Allow tractor pressure to drop to as low as 40 psi before shutting off

Allow tractor pressure to drop to as low as 10 psi before shutting off

5 / 30

A bobtail tractor has very little weight over the rear drive axles, so it's very easy to lock up the rear brakes. What system is used to help prevent this?

Hydraulic braking system

Nothing

A bobtail proportioning system

Anti-lock braking system

6 / 30

When spring parking brakes are applied, how much force is applied to all of the brake components?

Up to 2,000 lbs

Up to 1200 lbs

Up to 1500 lbs

Up to 1700 lbs

7 / 30

Most trailer air supply valves are what shape and colour?

Octagon and red

Circle and orange

Triangle and yellow

Square and green

8 / 30

What is a spring brake modulator?

It moderates how much air pressure is required before it goes to the spring brakes

It adds more air pressure to the spring brakes

It divides the air pressure for each spring brake

It senses a loss of pressure in the primary system, and when the service brakes are applied

9 / 30

Why should glad hands be fastened to dead-end (dummy) couplers or to each other when not in use?

To prevent dirt and debris from entering the air lines

To ensure they don't get damaged

To help keep the couplers lubricated

For easy access when you need them next

10 / 30

What should always be done after coupling the tractor to a trailer?

A tug test

A block test

An air pressure test

A brake test

11 / 30

What is the method used to check that the two-way check valve is working?

Drain the primary reservoir and check that air pressure in the secondary reservoir doesn't bleed back into the primary reservoir

Monitor the air pressure gauges

Check the warning lights

Adjust the brakes with the slack adjuster

12 / 30

How can you tell if you have reversed the supply line and service line connections?

The spring parking brakes won't release even when you use the parking brake control on the dashboard

The trailer service brakes function as normal but with a jerky action

The gauge on the dashboard shows you

The spring parking brakes release but the service brakes won't function properly

13 / 30

Are hand valves spring-loaded, like the foot valve?

Yes, only if they are new

Only if the spring is added as an after-market addition

Yes

14 / 30

With regards to the spring brakes, what should happen before making a heavy service brake application?

None of the above

Always release the spring parking brakes

Brake as normal

Slightly release the spring parking brakes after beginning applying the service brakes

15 / 30

Which reservoir does the two-way check valve use to supply the parking brake dash control with air?

The main supply

Both primary and secondary reservoirs

Just the primary

Just the secondary

16 / 30

Should the proper operation of the tractor protection system be checked regularly?

If requested by a peace officer

Yes

Only if a problem presents itself

17 / 30

What is the name of the coupling device used to connect and disconnect air lines from tractors and trailers?

Grand hands

Glad hands

Glue hands

Grey hands

18 / 30

When bobtailing, the braking pressure to the drive axle brakes is reduced by as much as...

75%

60%

45%

50%

19 / 30

How many inlet ports does the two-way check valves have?

Four

One

Three

Two

20 / 30

What's the purpose of a hand valve?

It controls the governor

It controls the air compressor

None of the above

It allows independent control of the trailer brakes

21 / 30

What is the purpose of the control line?

It carries the control signal from the tractor

It fills the reservoirs with air

It controls the pressure in the brake lines

It controls the dispersion of air

22 / 30

Can you use the hand valve should in normal or emergency situation braking?

Yes, just for normal braking situations

Only during emergency situations

Yes

23 / 30

If all air is lost and the vehicle has to be towed, how can the spring brakes be released?

Releasing by a socket wrench

None of the above

With the slack adjuster

The brakes can be caged

24 / 30

A peace officer may place your vehicle out of service if the tractor protection system allows the tractor pressure to drop below how much psi?

20 psi

40 psi

45 psi

30 psi

25 / 30

What is another name for the control line?

Master line

Service line

Feeder line

Supply line

26 / 30

What is it called when the relay emergency valve senses the trailer has broken away from the tractor and applies the trailer service brakes with full trailer reservoir pressure?

Exploding

Fusing

Nothing

Dynamiting

27 / 30

Trailers that aren't equipped with spring parking brakes use a device called...

Response emergency adjuster

None of these

Relay emergency valve

Emergency stopping valve

28 / 30

What is the air that is delivered from the two-way check valve is frequently called?

Premium air

Nothing

Mainstream

Blended air

29 / 30

What is the purpose of the tractor protection system?

To prevent the brakes from overheating

To prevent the trailer from disconnecting from the tractor

Relay emergency valve

To prevent the tractor air from being depleted to an unsafe level

30 / 30

What is another name for the supply line?

Master line

Nothing

Feeder line

Emergency line

Your score is

BC Air Brake Practice Test 04

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