BC COMMERCIAL DRIVER LICENCE PRACTICE TEST 04

As per the regulations set by the Government of British Columbia, commercial drivers must abide by strict traffic rules while on the road.

BC Commercial Driver Licence - Quiz 4

When a sign displays a red circle with a red line that bisects the circle at an angle, what should drivers understand about the action depicted on the sign underneath the red circle?

a. The action is prohibited.

b. The action is permitted.

c. The action is prohibited for commercial drivers only.

d. The action is legal, but not advised.

Question 1 of 30

Why is manual adjustment of automatic slack adjusters dangerous?

a. because it gives a false sense of security about the effectiveness of the braking system

b. because the automatic adjuster can engage and cause bodily harm to the person trying to perform the manual adjustment

c. because the automatic slack adjuster will no longer re-set to its designed stroke

d. because manual adjustment tools do not fit automatic slack adjusters and injury can result

Question 2 of 30

Which of the following are two ways that spring parking brakes can be held in the released position?

a. by using the foot valve or, automatically, when the air pressure rises (usually above 60 p.s.i.)

b. by using the parking brake control on the dashboard or, If the air pressure in the system falls below 60 p.s.i., the spring brakes may begin to drag, and at 20 to 45 p.s.i.may automatically fully apply.

c. by using the foot valve or, automatically, when the air pressure falls (usually below 60 p.s.i.)

d. by using the parking brake control on the dashboard or, automatically, when the air pressure rises (usually above 60 p.s.i.)

Question 3 of 30

Which of the following is correct when you are manually performing a slack adjustment?

a. The pushrod and the slack adjuster should never move in or out while you are turning the adjusting bolt

b. If you're turning in the proper direction, the cam will rotate in the opposite direction that it would if the brakes were being applied.

c. If you can see the brake shoes and linings through an inspection slot, you can visually verify that the linings have not contacted the drum.

d. Once you are turning in the proper direction, you should turn until you feel that the brake pad is loose in the drum.

Question 4 of 30

What are the maximum amounts of on-duty times in Cycles 1 and 2?

a. Cycle 1 has a maximum of 70 on-duty hours in 7 days and Cycle 2 has a maximum of 120 on-duty hours in 14 days

b. Cycle 1 has a maximum of 80 on-duty hours in 10 days and Cycle 2 has a maximum of 100 on-duty hours in 14 days

c. Cycle 1 has a maximum of 50 on-duty hours in 5 days and Cycle 2 has a maximum of 100 on-duty hours in 10 days

d. Cycle 1 has a maximum of 90 on-duty hours in 9 days and Cycle 2 has a maximum of 100 on-duty hours in 11 days

Question 5 of 30

How much might you be fined for operating a vehicle with defective brakes, including excessive brake chamber pushrod stroke?

a. $2000

b. $1000

c. $1500

d. $200

Question 6 of 30

You are driving a tractor-trailer, and the two connecting air lines between the tractor and trailer have just broken. What's function does the tractor protection system perform in this circumstance?

a. It sounds an alarm which indicates the trailer has become disengaged.

b. It automatically applies the tractor brakes.

c. It locks down the trailer doors.

d. It automatically shuts off air loss from the tractor.

Question 7 of 30

What colour and shape are signs on the road that warn of possible hazards ahead?

a. yellow and triangle-shaped

b. white outlined in red and circular

c. yellow and diamond-shaped

d. red outlined in yellow and square

Question 8 of 30

Using the pry method of free stroke measurement for checking brake adjustment, a free stroke approaching what length indicates the brakes need adjusting?

a. 30 mm

b. 10 mm

c. 25 mm

d. 20 mm

Question 9 of 30

The air line between the compressor on your vehicle and the supply reservoir has ruptured. Which of the following prevents a total loss of air pressure in the service brake system?

a. the one-way check valve

b. the quick-release valve

c. the governor

d. the drain cock

Question 10 of 30

By federal law, how often must you perform manual and automatic slack adjuster inspections?

a. once a month

b. weekly and before driving down a steep hill posted with regulatory signs

c. daily and before driving down a steep hill posted with regulatory signs

d. every other day and you must log your inspections in your logbook

Question 11 of 30

What must you do if the low pressure warning indicator on your air brake activates?

a. Stop the vehicle immediately and find the cause of the air loss.

b. Pump the brakes to see if the air pressure rises again.

c. Increase the vehicle's speed immediately, then do a 'hard application' of the brakes to see if the air pressure rises again.

d. Slow the vehicle immediately and continue driving for at least a mile to see if the air pressure rises again.

Question 12 of 30

What colour and shape are signs that pertain to warnings near schools?

a. blue outlined in yellow and square

b. yellow and diamond-shaped

c. yellow outlined in red and circular

d. Fluorescent yellow-green and pentagon-shaped

Question 13 of 30

As a commercial driver, you must keep in your possession a daily log that's updated to your last change in duty status, as well as copies of your daily log for your cycle, and any supporting documents. How much time do you have to submit those items to your carrier?

a. 45 days

b. 7 days

c. 30 days

d. 20 days

Question 14 of 30

There are usually two air line connections between a tractor and a trailer. One provides air from the tractor's compressor to the trailer at full reservoir pressure. What does the other air line connection supply?

a. non-pressurized air for refilling trailer tires

b. air for heating or cooling the contents of the trailer, as needed

c. air from the trailer's compressor back to the tractor at full pressure

d. control signals from the tractor about when to apply and release the brakes

Question 15 of 30

As a commercial driver, how many hours of off-duty time must you take every day and how many of those hours must be consecutive?

a. You must take 8 hours of off-duty time each day, and 6 of those hours must be consecutive

b. You must take 11 hours of off-duty time each day, and 9 of those hours must be consecutive.

c. You must take 12 hours of off-duty time each day, and 10 of those hours must be consecutive

d. You must take 10 hours of off-duty time each day, and 8 of those hours must be consecutive

Question 16 of 30

What happens when a trailer relay emergency system 'dynamites' the trailer's brakes?

a. The system has sensed that the tractor and trailer are about to jackknife, and it has released the trailer service brakes to prevent the jackknifing.

b. The system has sensed that the trailer has broken away from the tractor, and it applies the trailer service brakes with full reservoir pressure.

c. The system has sensed that the trailer is about to back into a stationary object, and it applies the trailer service brakes with half reservoir pressure.

d. The system has sensed that there has been an explosion of some sort on the tractor, and it has broken away from the tractor.

Question 17 of 30

As a tractor-trailer truck driver, you pull into a pullout area to complete a pre-hill inspection. If your vehicle has air brakes with automatic slack adjusters, must you check pushrod travel?

a. yes

b. yes, but only if the grade of the hill is more than 10%

c. no

d. yes, but only if the grade of the hill is more than 15%

Question 18 of 30

What is an industrial road?

a. a road that was specifically strengthened for the transport of industrial equipment

b. a road that solely provides access to the servicing of railroad tracks

c. any road that exists for the transportation of natural resources, machinery, materials or personnel

d. a road that was built using natural resources

Question 19 of 30

If there are two drivers with a vehicle, generally only one of the two needs to sign the written inspection report. When must both drivers sign the report?

a. when the two drivers split the driving time equally

b. when the report covers a period of more than twenty-four (24) hours

c. when the drivers disagree about a reported defect

d. when the two drivers are in total agreement about a reported defect

Question 20 of 30

In a dual air brake system, if an air line in the primary braking system ruptures, what happens if you make a brake application?

a. Your stopping distance is shorter because only the steering axle brakes are applying.

b. Your stopping distance is shorter because only the rear axle brakes are applying.

c. Your stopping distance is longer because only the rear axle brakes are applying.

d. Your stopping distance is longer because only the steering axle brakes are applying.

Question 21 of 30

How many consecutive hours off-duty does it take to reset Cycle 1 and Cycle 2?

a. For Cycle 1 it is 36 consecutive hours and Cycle 2 96 consecutive hours

b. For Cycle 1 it is 36 consecutive hours and Cycle 2 72 consecutive hours

c. For Cycle 1 it is 48 consecutive hours and Cycle 2 96 consecutive hours

d. For Cycle 1 it is 48 consecutive hours and Cycle 2 36 consecutive hours

Question 22 of 30

An air brake-endorsed driver's licence is required to operate most vehicles equipped with air-over-hydraulic brakes. What is the only exception?

a. if the brake system can be converted to an all-mechanical system

b. if the air-over-hydraulic system requires a compressor

c. if the air-over-hydraulic system does not require a compressor

d. if the brake system does not use an air treadle

Question 23 of 30

What colour are signs, such as speed limit signs, that advise drivers about driving regulations?

a. white outlined in black

b. red outlined in yellow

c. yellow

d. orange outlined in red

Question 24 of 30

You enter a lane in which there are double broken yellow lines running down the center. What is the significance of these lane markings?

a. All vehicles may use the lane, but they must give the right-of-way to oncoming vehicles.

b. The lane is for use only by emergency vehicles.

c. The lane is reversible. Look for a lane control signal to determine whether you can use the lane.

d. Construction is occurring down the middle of the lane.

Question 25 of 30

What are glad hands?

a. gloves specially designed for use in loading or unloading commercial vehicles

b. metal hand-holds along a trailer that make it easy to climb into a trailer

c. a quick coupling device for connecting air line connections between a tractor and trailer

d. a signal between commercial vehicle drivers in which one allows the other to cross into the lane in front

Question 26 of 30

Why do commercial vehicles with air brakes also have mechanical parking brakes?

a. Regulations for parking brakes require that the parking force must be maintained with devices that rely on compressed air.

b. Air pressure is totally unreliable for stopping a vehicle by applying foundation brakes.

c. Mechanical parking brakes are more fuel efficient.

d. Regulations for parking brakes require that the parking force must be maintained by mechanical means and be unaffected by a loss of air pressure.

Question 27 of 30

Using the applied stroke method for checking for brake adjustment, an applied stroke approaching what length indicates the brakes need adjusting?

a. 45 mm

b. 40 mm

c. 25 mm

d. 38 mm

Question 28 of 30

Compounding spring and air brakes can permanently damage service brake components. How can you avoid compounding brakes?

a. Always release the service brakes before making a spring parking brake application.

b. Always release the spring parking brakes before making a heavy service brake application.

c. Always apply the spring parking brakes before making a heavy service brake application.

d. Always make a heavy service brake application, which will automatically release the spring parking break.

Question 29 of 30

You are traveling in an empty truck on a steep hill on a single-lane industrial road. What must you do when a loaded vehicle is approaching?

a. back up to entrance of the road to get out of the way of the loaded truck

b. turn around and head back to the entrance of the road in order to get out of the way of the loaded truck

c. use a turnout to give the loaded truck the right-of-way

d. flash your headlights to remind the loaded truck to give you the right-of-way

Question 30 of 30

These rules have been put in place to ensure the safety of both drivers and other road users. Commercial drivers must maintain a safe and reasonable speed, obey traffic signals and road signs, and keep a safe following distance from other vehicles. They must also maintain proper lane discipline, avoid distractions while driving, and conduct regular vehicle inspections before embarking on their journeys. Additionally, commercial drivers must be well-rested and not exceed their maximum service hours, as set out in the Provincial legislation. These traffic rules for commercial drivers are meant to promote safe and professional driving practices in British Columbia’s transport industry.

Remember, our tests are similar to the official BC professional drivers test you must take and pass to attain your commercial driver’s licence. No practice test can be the same as the official one, as they change often. Still, by practicing with them in conjunction with your “driving commercial vehicles – a guide for professional drivers” handbook, you will be well on your way to attaining your CDL in a short period.