Ontario Air Brake Test For Z Endorsement | DrivingTest

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Ontario Air Brake Test – Quiz 04

Ontario Air Brake Test 04

If air brake chambers on different sides of an axle are different sizes, this may cause...?
a.
b.
c.
d.

Question 1 of 30

When checking a vehicle's brake drums, you should be looking out for...?
a.
b.
c.
d.

Question 2 of 30

The discovery of a small quantity of oil is only no cause for concern if it comes from...?
a.
b.
c.
d.

Question 3 of 30

The amount of air loss from a system should be measured with the brake fully applied for how long?
a.
b.
c.
d.

Question 4 of 30

If a vehicle has a foundation brake defect, the Ontario Highway Traffic Act specifies that it may not...?
a.
b.
c.
d.

Question 5 of 30

The maximum allowable air loss for a tractor and trailer when the brakes are applied is...?
a.
b.
c.
d.

Question 6 of 30

When the air pressure has been reduced to below 552 kPa, it should then be able to rise from 587 kPa to 690 kPa within...?
a.
b.
c.
d.

Question 7 of 30

Spring brakes should be tested by applying the brakes and...?
a.
b.
c.
d.

Question 8 of 30

The low air pressure warning device is defective if it fails to activate at a minimum level of...?
a.
b.
c.
d.

Question 9 of 30

The outer cover of an air line has been damaged, but there is no leak to the inner tube. What action should you take?
a.
b.
c.
d.

Question 10 of 30

When checking air brake chambers, you should be looking out for...?
a.
b.
c.
d.

Question 11 of 30

Actual cut-out pressure must never be higher than...?
a.
b.
c.
d.

Question 12 of 30

When testing the spring brakes on a towing vehicle and trailer, it is preferable to perform the test on...?
a.
b.
c.
d.

Question 13 of 30

A straight truck, tractor or bus must not lose air pressure with the brakes fully applied at a rate of more than...?
a.
b.
c.
d.

Question 14 of 30

The minimum pressure for compressor cut-in is...?
a.
b.
c.
d.

Question 15 of 30

Air compressors should always be inspected with...?
a.
b.
c.
d.

Question 16 of 30

You should make sure that air tanks are securely attached to the vehicle by...?
a.
b.
c.
d.

Question 17 of 30

You should begin a test of the low air pressure warning device with the pressure above...?
a.
b.
c.
d.

Question 18 of 30

The application of the automatic trailer spring brakes can be confirmed by...?
a.
b.
c.
d.

Question 19 of 30

A tractor protection valve should be tested by disconnecting the trailer service line and then...?
a.
b.
c.
d.

Question 20 of 30

Brake lining is the friction material that is fastened to...?
a.
b.
c.
d.

Question 21 of 30

The amount of moisture discharged from tanks other than the supply tank should be...?
a.
b.
c.
d.

Question 22 of 30

A tractor hauling two or more trailers must not lose air pressure with the brakes fully applied at a rate of more than...?
a.
b.
c.
d.

Question 23 of 30

An air pressure buildup time test should be made with the engine idling between...?
a.
b.
c.
d.

Question 24 of 30

You must never make an inspection of your brakes unless...?
a.
b.
c.
d.

Question 25 of 30

Brake lining can be contaminated by...?
a.
b.
c.
d.

Question 26 of 30

The drive belt of an air compressor should give slightly under...?
a.
b.
c.
d.

Question 27 of 30

When applying a test to the spring brakes, the test is only passed if...?
a.
b.
c.
d.

Question 28 of 30

Air brake chamber leaks must be inspected for with...?
a.
b.
c.
d.

Question 29 of 30

The recommended way to test a trailer's automatic spring brakes is to...?
a.
b.
c.
d.

Question 30 of 30


 

It is recommended that you take a practice test before you take the actual written test. Please note, however, that this is not the actual test, and you will not receive your license if you pass this sample practice test. If you’re getting your commercial licence, you've come to the right place.

Ontario Air Brake Test

Our free Ontario air brake test questions and answers will prepare you to pass Ontario official Air Brakes knowledge test. To begin your career in trucking, you must obtain your Ontario Class A or Class D Truck Driver Licence. The appropriate CDL endorsements you will need are based on the type of trucking career you plan to pursue. To obtain these endorsements, you are required to complete a written knowledge test successfully. Making certain you are adequately prepared for your written knowledge test will prevent you from wasting time and money. Taking practice CDL tests is the best way to get prepared.

Passing your air brake test doesn’t have to be a stressful experience. Follow this important tip, and you should pass the test with no problem.

Eat and Sleep Well – Before the Ontario air brake test, make sure that you eat and sleep well. A drop in blood sugar while taking the test can cause you to have issues with remembering what you have studied. You will also want to get a good night’s rest before test day. Being tired will greatly reduce alertness, and hinder your ability to recall important facts when taking the test.