BC Air Brake Practice Test 07

Taking the BC air brake practice test is a crucial step towards obtaining your commercial driver’s license. It provides an opportunity to familiarize yourself with the format and content of the official exam. By taking the practice test multiple times, you can assess your strengths and weaknesses and focus your studying accordingly. When the time comes to take the official exam, it is essential to remain calm and confident.

BC Air Brake Test 07

1 / 30

Should each brake on an axle be adjusted to have a similar amount of pushrod travel?

Yes

They are all separate

They can be quite off, but as long as they work

2 / 30

On long downgrades, what can the expansion of hot brake drums can cause?

A total loss of braking and result in a runaway

Shorter stopping distance because of the friction

A longer but controlled stop

Nothing

3 / 30

Do cast iron brake drums expand when heated?

Yes

After roughly 50 applications

Not in cool weather

4 / 30

How would you know if the previous slack adjustment was done incorrectly?

If the pushrod goes into the chamber

If there is wear markings

If the pushrod was tight

If the pushrod was loose

5 / 30

Is it common, especially on tandem axle units, for the adjusting bolts on one axle to adjust in one direction, while the other axle requires an opposite turn?

On older vehicles only

On new vehicles only

Yes

6 / 30

How much should you back off the adjusting bolt to establish correct running clearance between the lining and drum?

about 1/2 of a turn

about 1/4 of a turn

about 1/3 of a turn

about 2/3 of a turn

7 / 30

Do air-brake-equipped vehicles lose their brakes?

Once every 1500 km traveled

Once every 500 km traveled

Rarely

Once a month

8 / 30

Who uses the applied stroke method for checked adjusting s-cam brakes?

Roadside inspectors

Carriers

Drivers

Peace officers

9 / 30

With the applied stroke method of servicing s-cam brakes, what is the minimum reservoir pressure required?

80 psi

70 psi

100 psi

65 psi

10 / 30

When correctly adjusted, what is the running clearance between the brake lining and drum?

1/32 of an inch

1/16 on an inch

A few thousandths of an inch

1/64 of an inch

11 / 30

When using the pry method of free stroke measurement, what psi should the air system be?

Between 60 and 90 psi

Less than 100 psi

Over 100 psi

Less than 60 psi

12 / 30

New air brake chamber pushrods have a marking. What does it indicate?

To indicate when brake adjustment must be done immediately

That braking pressure is too severe

When the pushrod needs to be replaced

None of the above

13 / 30

When you turn the adjusting bolt, why are you watching the end of the camshaft?

It should remain tight as the bolt is being turned

None of the above

It should rotate slightly as the bolt is being turned

It should become loose

14 / 30

To perform a leak test, hold a firm brake application for 1 minute, you cannot lose any more then how many psi?

9 psi

3 psi

5 psi

7 psi

15 / 30

What size wrench is typically used to turn the adjusting bolt?

9/16 inch

3/8 inch

1/2 inch

3/4 inch

16 / 30

Would the s-cam brakes seem to be effective when the brake drum is cool and with normal brake application pressure?

In wet weather

Yes

Only at slow speeds

17 / 30

What is meant by pushrod travel?

The diameter of the pushrod

The measurement from one end of the pushrod to the other

The distance the pushrod extends from the air brake chamber when the brakes are applied

The distance the pushrod extends from the air brake chamber when the brakes are released

18 / 30

What is done with a spring-loaded locking sleeve on most manual slack adjusters?

Pull it out so the adjusting bolt can be turned

Pull it out and turn it clockwise

Press it in and hold it so the adjusting bolt can be turned

Pull it out and turn it counter clockwise

19 / 30

Which statement is false? Make sure you have the proper equipment to check the brakes, including...

A tool to pry on the air brake chamber pushrod to check for free stroke

A flashlight to inspect components

Chalk or other marker, and a ruler or other marking device, to check pushrod free stroke

Lubricant

20 / 30

When using the applied stroke method of checking the s-cam brakes, at what distance should the brakes require adjustment?

More than 1 1/8 inch

More than 1 1/2 inch

More than 1 3/4 inch

More than 1 1/4 inch

21 / 30

Which statement is false? While checking air brakes look for other brake component wear and excessive play including...

S-cam spline wear

Thread wear

Clevis pin wear

S-cam bushing wear

22 / 30

Once the leak test is completed, how much air pressure as a minimum should you confirm there is in the reservoirs?

70 psi

80 psi

100 psi

90 psi

23 / 30

Once you know the proper direction, why do you continue turning until solid resistance is met?

To know you're done

It indicates that the brake linings have contacted the brake drum

To know you're half way through the adjustment

It indicates that the pushrod is at the maximum depth

24 / 30

How would you know if the adjusting bolt is being turned in the wrong direction?

The adjusting bolt is too loose to move

None of the above

The adjusting bolt is too tough to move

If the slack adjuster is pulling the pushrod out of the chamber when you turn the adjusting bolt

25 / 30

Why should you turn off the engine while doing brake adjustments?

To cool the brakes

To relax the lines

To listen for leaks

None of the above

26 / 30

How can you visually verify that the linings have contacted the drum?

Use a magnifying glass

Crawl underneath the vehicle

You can't

If the brake has no dust shields, or if you can see the brake shoes and linings through an inspection slot

27 / 30

Can s-cam brakes be adjusted very accurately with the wheels on the ground?

Just the trailer brakes can

Just the tractor brakes can

Yes

28 / 30

When using the pry method of free stroke measurement, when would the brakes need adjustment?

If the distance is more than 1/4 of an inch

If the distance is more than 1 1/4 of an inch

If the distance is more than 3/4 of an inch

If the distance is more than 1 1/2 of an inch

29 / 30

What happens if the brakes on one or the other axle have been mistakenly backed off?

It's tough to remove the wrench

It creates a serious safety hazard

Nothing serious happens

A warning light shows on the dash

30 / 30

When adjusting the brakes, what should the air system be?

Full pressure

50% pressure

80% pressure

75% pressure

Your score is

BC Air Brake Practice Test 07

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