Ontario Air Brake Test 07

When preparing for the Ontario air brake test, it’s important to take advantage of resources like the Ontario air brake practice test. This practice test is an invaluable tool for ensuring that you thoroughly understand the content and format of the actual exam. The practice test contains questions that cover important topics such as air brake adjustment, system components and inspection, and safe driving practices. Additionally, taking the practice test allows you to identify areas where you may need to review material or seek additional resources. With dedication and preparation, you can feel confident going into the Ontario air brake test and ultimately earning your air brake endorsement.

1 / 30

When testing the low air pressure warning devices, what should the psi be?

80 psi

55 psi

90 psi

75 psi

2 / 30

When testing a tractor (towing vehicle) protection valve, the vehicle passes the test when...

Air does not exhaust from the trailer service line

Air does not extend beyond the primary tank

All of the above

Air does not exhaust from the brake chambers

3 / 30

The system's pressure range is controlled by what?

The size of the brake chambers

The air-compressor governor settings

The size of the compressor

All of the above

4 / 30

What will generally affect the governor pressure setting?

The driver's decision

The age of the compressor

The model year of the vehicle

The number of brakes on the vehicle

5 / 30

The vehicle fails the system air-loss rate test when...

The drop in pressure exceeds the value specified for the vehicle

The compressor cuts out

The drop in pressure is barely noticeable

None of the above

6 / 30

After the air tanks are drained regularly, what should happen?

All of the above

The drain valves replaced

The discharge should be observed for abnormalities

The drain valves cleaned

7 / 30

Which of the following is not a step when testing the spring (parking and emergency) brakes?

Observe the vehicle's response

Gently apply engine power in a low gear

Ensure the air tanks are full

Apply the spring brakes on the vehicle to be tested and remove wheel chocks

8 / 30

The air loss rate for a straight truck, tractor or bus is...

1 psi per minute

3 psi per minute

2 psi per minute

4 psi per minute

9 / 30

With the engine idling between 600 and 900 rpm, how long should it take for the air pressure to rise from 85 to 100 psi?

Within 2 minutes

Less than 60 seconds

4 minutes or more

Up to 3 minutes

10 / 30

What is the concern when oil is found in any air tank, other than the supply tank?

There is a risk of air brake system contamination

An air hose has been compromised

The tank must be drained

It's time for an oil change

11 / 30

The air loss rate for a tractor and trailer is...

1 psi per minute

2 psi per minute

3 psi per minute

4 psi per minute

12 / 30

While a small amount of oil may be found in the supply tank, any visible quantity of oil should be...

None of the above

Ignored

Reported or repaired

Cleaned up

13 / 30

To test the low air-pressure warning device, pressure in the system must be reduced to the point where the device activates or what at psi, whichever is higher?

55 psi

35 psi

65 psi

45 psi

14 / 30

To test the air-pressure build-up time, what should the system pressure be reduced to?

Below 80 psi

Above 90 psi

Below 60 psi

Below 50 psi

15 / 30

Which of the following is not a step when testing the automatic application of the trailer spring brakes?

Ensure the trailer supply valve is closed and the trailer is fully charged

Ensure the air brake system is within its normal operating pressure range

Pull out the trailer supply valve to close it

Observe the trailer for application of the trailer's spring brakes

16 / 30

When testing air pressure build-up time, how fast should the rpm be?

900 to 1100 rpm

500 rpm

1200 rpm

600 to 900 rpm

17 / 30

To test the air-loss rate of the brake system, release the spring brakes, establish normal air pressure, shut off the engine and hold the brake pedal in the fully applied position and observe the air-pressure readings for how long?

One minute

Three minutes

Two minutes

Four minutes

18 / 30

The air brake system is defective when cut-out pressure is above...

155 psi

145 psi

135 psi

125 psi

19 / 30

The vehicle passes the test if the device activates when pressure is at or above what psi on both primary and secondary air tank gauges?

45 psi

None of the above

55 psi

65 psi

20 / 30

The vehicle passes the system air-loss rate test when the drop in pressure...

Is equal to or less than the value specified for the vehicle

All of the above

When the driver can't hear any air loss

When the warning gauges fail to show anything

21 / 30

Which of the following is not a step for testing a tractor (towing vehicle) protection valve?

Ensure the trailer supply valve is closed (pulled out)

Ensure that the air brake system is within its below operating pressure range

Press and hold the brake pedal

Disconnect the trailer service air line coupler from either the trailer or the dead-end coupler and place it where it can be observed.

22 / 30

The vehicle fails the test if the device does not activate or activates when pressure is below what psi on both primary and secondary air tank gauges?

55 psi

75 psi

65 psi

45 psi

23 / 30

The air loss rate for a tractor and two or more trailers is...

6 psi per minute

8 psi per minute

4 psi per minute

5 psi per minute

24 / 30

When do air pressure gauges stop climbing?

When the rpm of the engine drops

All of the above

With compressor cut-out

When the brakes are not applied

25 / 30

A significant quantity of moisture being discharged from the supply tank - even when the tank is drained on a regular basis is...

A bigger problem

Cause for concern

Time to replace the tanks

Normal

26 / 30

Which of the following is not a step for testing low air-pressure warning devices?

Press and release the brake pedal repeatedly to lower air pressure

The engine may be stopped or left running but the ignition must be off

Observe the primary and secondary air tank pressure gauges

Watch and listen for the low air-pressure warning device to activate

27 / 30

When testing air-compressor governor settings, what does compressor cut-in cause?

Less horsepower

A change in the sound of the engine

Weak braking power

A beeping sound

28 / 30

What happens if the device does not activate or activates when pressure is below the described psi on either the primary or secondary air pressure gauge?

It must be tested again with the engine off

It sends a warning

Start the engine and try again

It fails

29 / 30

A trailer's spring brakes must automatically apply whenever what happens?

The vehicle is parked

The trailer is disconnected from the towing vehicle

All of the above

The engine is turned off

30 / 30

Which of the following is not one of the steps for testing air-compressor governor settings?

Press and release the brake pedal several times to lower the system pressure and note the cut-in pressure setting

Run the engine until air brake system pressure reaches its maximum level and note the cut-out pressure setting

Properly secure the vehicle and apply the spring brakes

Observe the primary and secondary air-tank pressure gauges

Your score is

Ontario Air Brake Test 07

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