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

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

Lubricant

A flashlight to inspect components

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

2 / 30

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

The adjusting bolt is too loose to move

The adjusting bolt is too tough to move

None of the above

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

3 / 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

It should become loose

It should rotate slightly as the bolt is being turned

None of the above

4 / 30

Do air-brake-equipped vehicles lose their brakes?

Once a month

Once every 1500 km traveled

Once every 500 km traveled

Rarely

5 / 30

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

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

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

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

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

6 / 30

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

If the pushrod goes into the chamber

If the pushrod was tight

If there is wear markings

If the pushrod was loose

7 / 30

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

They are all separate

Yes

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

8 / 30

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

Over 100 psi

Less than 100 psi

Less than 60 psi

Between 60 and 90 psi

9 / 30

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

100 psi

80 psi

70 psi

90 psi

10 / 30

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

It indicates that the pushrod is at the maximum depth

It indicates that the brake linings have contacted the brake drum

To know you're half way through the adjustment

To know you're done

11 / 30

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

1/64 of an inch

1/32 of an inch

A few thousandths of an inch

1/16 on an inch

12 / 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

13 / 30

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

Clevis pin wear

S-cam bushing wear

S-cam spline wear

Thread wear

14 / 30

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

That braking pressure is too severe

When the pushrod needs to be replaced

To indicate when brake adjustment must be done immediately

None of the above

15 / 30

What is meant by pushrod travel?

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

The measurement from one end of the pushrod to the other

The diameter of the pushrod

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

16 / 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

Yes

On new vehicles only

17 / 30

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

It's tough to remove the wrench

A warning light shows on the dash

Nothing serious happens

It creates a serious safety hazard

18 / 30

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

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

Pull it out and turn it counter clockwise

Pull it out and turn it clockwise

Pull it out so the adjusting bolt can be turned

19 / 30

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

Use a magnifying glass

You can't

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

Crawl underneath the vehicle

20 / 30

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

1/2 inch

9/16 inch

3/8 inch

3/4 inch

21 / 30

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

Only at slow speeds

Yes

In wet weather

22 / 30

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

Carriers

Roadside inspectors

Peace officers

Drivers

23 / 30

Do cast iron brake drums expand when heated?

Yes

Not in cool weather

After roughly 50 applications

24 / 30

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

50% pressure

80% pressure

75% pressure

Full pressure

25 / 30

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

70 psi

100 psi

80 psi

65 psi

26 / 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 1/4 inch

More than 1 1/2 inch

More than 1 3/4 inch

27 / 30

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

about 1/3 of a turn

about 1/4 of a turn

about 1/2 of a turn

about 2/3 of a turn

28 / 30

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

To relax the lines

To cool the brakes

None of the above

To listen for leaks

29 / 30

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

7 psi

9 psi

5 psi

3 psi

30 / 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

Your score is

BC Air Brake Practice Test 07

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