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

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

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

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

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

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

The gauge on the dashboard shows you

4 / 30

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

For easy access when you need them next

To ensure they don't get damaged

To prevent dirt and debris from entering the air lines

To help keep the couplers lubricated

5 / 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

Air compressor

Air chambers

Foundation brakes

6 / 30

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

Emergency stopping valve

Relay emergency valve

None of these

Response emergency adjuster

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 brakes from overheating

To prevent the trailer from disconnecting from the tractor

8 / 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

9 / 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 10 psi before shutting off

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

10 / 30

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

None of the above

Brake as normal

Always release the spring parking brakes

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

11 / 30

What is another name for the control line?

Feeder line

Master line

Supply line

Service line

12 / 30

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

Three

Four

Two

One

13 / 30

Spring parking brakes are mounted on which axles?

Steering axles

Drive axles

Trailer axles

Rear axles only

14 / 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

Hydraulic braking system

Anti-lock braking system

Nothing

15 / 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

The brakes can be caged

With the slack adjuster

16 / 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?

Nothing

Dynamiting

Exploding

Fusing

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

Up to 1200 lbs

Up to 2,000 lbs

Up to 1700 lbs

Up to 1500 lbs

19 / 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?

45 psi

30 psi

20 psi

40 psi

20 / 30

What's the purpose of a hand valve?

It controls the air compressor

None of the above

It controls the governor

It allows independent control of the trailer brakes

21 / 30

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

Blended air

Premium air

Mainstream

Nothing

22 / 30

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

45%

60%

75%

50%

23 / 30

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

Only if a problem presents itself

If requested by a peace officer

Yes

24 / 30

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

Only during emergency situations

Yes

Yes, just for normal braking situations

25 / 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

26 / 30

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

Adjust the brakes with the slack adjuster

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

27 / 30

Most trailer air supply valves are what shape and colour?

Octagon and red

Circle and orange

Square and green

Triangle and yellow

28 / 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

29 / 30

What is a spring brake modulator?

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

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

30 / 30

What is another name for the supply line?

Nothing

Emergency line

Master line

Feeder line

Your score is

BC Air Brake Practice Test 04

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