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

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

With the slack adjuster

None of the above

Releasing by a socket wrench

The brakes can be caged

2 / 30

What's the purpose of the supply line?

It brings air into the compressor

It attaches to the foot valve

None of the above

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

3 / 30

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

Glue hands

Grey hands

Grand hands

Glad hands

4 / 30

Most trailer air supply valves are what shape and colour?

Triangle and yellow

Circle and orange

Octagon and red

Square and green

5 / 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?

30 psi

45 psi

40 psi

20 psi

6 / 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 dispersion of air

It controls the pressure in the brake lines

7 / 30

What is the purpose of the tractor protection system?

Relay emergency valve

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

To prevent the trailer from disconnecting from the tractor

To prevent the brakes from overheating

8 / 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 help keep the couplers lubricated

For easy access when you need them next

To ensure they don't get damaged

9 / 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 1500 lbs

Up to 1700 lbs

Up to 1200 lbs

10 / 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 reservoirs

Air compressor

Air chambers

11 / 30

What's the purpose of a hand valve?

It controls the governor

It allows independent control of the trailer brakes

None of the above

It controls the air compressor

12 / 30

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

Premium air

Nothing

Blended air

Mainstream

13 / 30

Spring parking brakes are mounted on which axles?

Steering axles

Drive axles

Rear axles only

Trailer axles

14 / 30

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

Check the warning lights

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

Adjust the brakes with the slack adjuster

15 / 30

What is a spring brake modulator?

It divides the air pressure for each spring brake

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

16 / 30

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

Just the primary

Both primary and secondary reservoirs

The main supply

Just the secondary

17 / 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 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 20 psi before shutting off

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

18 / 30

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

A brake test

An air pressure test

A block test

A tug test

19 / 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

20 / 30

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

Brake as normal

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

Always release the spring parking brakes

None of the above

21 / 30

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

Four

Three

Two

One

22 / 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?

Nothing

Anti-lock braking system

Hydraulic braking system

A bobtail proportioning system

23 / 30

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

Yes

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

Yes, only if they are new

24 / 30

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

45%

60%

75%

50%

25 / 30

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

Yes

Only during emergency situations

Yes, just for normal braking situations

26 / 30

What is another name for the supply line?

Emergency line

Nothing

Feeder line

Master line

27 / 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 won't release even when you use the parking brake control on the dashboard

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

28 / 30

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

Emergency stopping valve

Response emergency adjuster

None of these

Relay emergency valve

29 / 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?

Fusing

Dynamiting

Exploding

Nothing

30 / 30

What is another name for the control line?

Service line

Feeder line

Master line

Supply line

Your score is

BC Air Brake Practice Test 04

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