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

What is the purpose of the control line?

It controls the dispersion of air

It carries the control signal from the tractor

It controls the pressure in the brake lines

It fills the reservoirs with air

2 / 30

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

One

Four

Three

Two

3 / 30

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

Yes

If requested by a peace officer

Only if a problem presents itself

4 / 30

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

50%

75%

60%

45%

5 / 30

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

Premium air

Mainstream

Blended air

Nothing

6 / 30

What's the purpose of the supply line?

It attaches to the foot valve

None of the above

It brings air into the compressor

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

7 / 30

What is another name for the supply line?

Nothing

Emergency line

Feeder line

Master line

8 / 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?

Air reservoirs

Foundation brakes

Air compressor

Air chambers

9 / 30

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

None of the above

Releasing by a socket wrench

The brakes can be caged

With the slack adjuster

10 / 30

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

A block test

A brake test

A tug test

An air pressure test

11 / 30

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

Yes

Yes, just for normal braking situations

Only during emergency situations

12 / 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

Adjust the brakes with the slack adjuster

Monitor the air pressure gauges

Check the warning lights

13 / 30

What is a spring brake modulator?

It adds more air pressure to the spring brakes

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

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

It divides the air pressure for each spring brake

14 / 30

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

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

Yes

Yes, only if they are new

15 / 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

16 / 30

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

None of these

Relay emergency valve

Emergency stopping valve

Response emergency adjuster

17 / 30

What's the purpose of a hand valve?

It controls the air compressor

It allows independent control of the trailer brakes

It controls the governor

None of the above

18 / 30

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

Just the secondary

The main supply

Both primary and secondary reservoirs

Just the primary

19 / 30

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

Always release the spring parking brakes

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

None of the above

Brake as normal

20 / 30

Spring parking brakes are mounted on which axles?

Trailer axles

Rear axles only

Steering axles

Drive axles

21 / 30

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

Up to 1500 lbs

Up to 1200 lbs

Up to 2,000 lbs

Up to 1700 lbs

22 / 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

Dynamiting

Nothing

23 / 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 10 psi before shutting off

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

24 / 30

What is another name for the control line?

Master line

Feeder line

Supply line

Service line

25 / 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?

A bobtail proportioning system

Anti-lock braking system

Hydraulic braking system

Nothing

26 / 30

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

The gauge on the dashboard shows you

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

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

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

27 / 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

For easy access when you need them next

To help keep the couplers lubricated

To ensure they don't get damaged

28 / 30

Most trailer air supply valves are what shape and colour?

Triangle and yellow

Circle and orange

Octagon and red

Square and green

29 / 30

What is the purpose of the tractor protection system?

To prevent the brakes from overheating

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

Relay emergency valve

To prevent the trailer from disconnecting from the tractor

30 / 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?

40 psi

30 psi

20 psi

45 psi

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BC Air Brake Practice Test 04

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