Class 4 Mock Test
#1. According to the British Columbia Driving Commercial Vehicles Manual, which dashboard gauge can help you decide when to upshift?
Learn the normal operating rpm range for your vehicle. The tachometer displays the current engine speed in rpm. According to the British Columbia Driving Commercial Vehicles Manual, you should upshift before your engine reaches the top of its normal rpm range.
#2. Making eye contact with cyclists around your vehicle
An important part of sharing the road with cyclists is being able to communicate with them. Recognize the hand signals they use. Make eye contact if you can; cyclists often use eye contact to communicate. Don’t startle cyclists by honking your horn unnecessarily.
#3. What makes the roads extra slippery at the start of a rainfall?
Roads are often at their slipperiest during the first 10 to 15 minutes of rain. This is because the rainwater loosens and mixes with dirt, oil, and other fluids that have built up on the pavement, creating a slick surface. This slippery condition will persist until more rain washes those substances away.
#4. Why should you never run your vehicle's engine in a closed garage?
Carbon monoxide (CO) forms from the incomplete burning of fuel, which can occur in a closed space (such as a garage) in which the supply of oxygen is limited. CO is highly poisonous. Running your vehicle’s engine in a closed garage for just a few minutes can produce lethal concentrations of CO.
#5. Which of the following statements about revolutions per minute (rpm) are true?
Revolutions per minute (rpm) is a measure of rotational speed. For an internal-combustion engine, rpm is the number of turns the crankshaft makes in one minute. The tachometer on your instrument panel shows the current crankshaft rpm. You should upshift before engine rpm becomes excessive.
#6. What is the purpose of an antilock braking system (ABS)?
ABS does not have much effect on your everyday driving. It does not affect your braking capability or shorten your stopping distance. It just helps you keep control of your vehicle by activating when your wheels are about to lock
#7. When a tire is underinflated,
Less air pressure pushing the tread down onto the road surface will reduce contact with the road surface, increasing the risk of hydroplaning. Also, increased flexing of the tire will cause excessive wear on the outer edges of the tread and possibly overheating of the tire.
#8. Idling for longer than five minutes can
Idling can burn up to four litres of fuel per hour. Idling for longer than five minutes wastes fuel, increases emissions, and can clog fuel injectors.
#9. Under British Columbia law, what is the definition of "public transportation"?
Under British Columbia law, “public transportation” is defined as the transportation of groups of people who aren’t your associates or members of your family.
#10. Which of the following types of commercial vehicles are required to carry fire extinguishers?
The following types of vehicles are required to carry one fire extinguisher: (a) school buses, (b) public passenger vehicles (such as buses), and (c) limited passenger vehicles that can carry more than 10 occupants (including the driver). Vehicles transporting explosives are required to carry two fire extinguishers.
#11. Which of the following statements about a vehicle's turning radius are true?
The turning radius of a vehicle is the radius of the smallest (tightest) circular path that the vehicle can traverse. A vehicle’s rear tires have a different turning radius than its front tires. You need to know the turning radius of your front wheels to prevent your vehicle’s rear wheels from overrunning the curb or corner when you turn. And knowing your vehicle’s turning radius will help you manoeuvre into or out of a parking space without hitting something.
#12. Which vehicles are required to carry warning devices for use should the vehicle become disabled?
The following commercial vehicles must carry approved warning devices, such as flags, flares, fusees or reflectors: (a) all vehicles with a seating capacity of more than 10 passengers, (b) all commercial vehicles with an overall width of more than 2.3 meters, and (c) all commercial vehicles with a load width of more than 2.3 metres. When parked in the dark, these commercial vehicles must have a minimum of two warning devices.
#13. The way in which a vehicle can be manoeuvred depends on which of the following?
Many commercial vehicles are larger, heavier and longer than other vehicles on the road. The extra size, weight and length affect the way these vehicles move, especially around turns and while backing up. Shorter vehicles tend to have smaller turning circles, and vehicles with shorter turning circles can make tighter turns. Some buses have a conventional configuration in which the driver’s seat is positioned behind the steering axle. However, other buses are forward-control vehicles in which the driver’s seat is in front of the steering axle. This affects both the vehicle’s turning radius and the driver’s viewpoint when turning. When driving a forward-control vehicle, you must start your turn at a slightly different point on the turning path than when you’re driving a vehicle with a conventional configuration.
#14. Under British Columbia law, what is the definition of a "special vehicle"?
Under British Columbia law, a “special vehicle” is defined as a motor vehicle that has a carrying capacity of no more than 10 persons (including the driver) and is designed or modified for public transportation of persons with disabilities.
#15. Under the British Columbia Motor Vehicle Act Regulations, how often must commercial vehicles be inspected?
All commercial vehicles that fall under the National Safety Code (NSC) must be inspected before they’re used each day (pre-trip inspections) and at the end of the final trip of each day (post-trip inspections). These inspections are required under the Motor Vehicle Act Regulations. Either you or another person specified by the carrier must do these inspections.
#16. If tire tread damage is longer than _______, the tire should be considered defective. 2.5 cm 3.5 cm 4.5 cm 1.5 cm
A tire should be considered defective if it has any tread damage (such as cuts, cracks or snags) that is longer than 2.5 cm (1 inch) and deep enough to expose the ply cords.
#17. While you're driving a school bus, it breaks down on the road. What should you do?
If your school bus breaks down on the road, try to stop the bus in a safe place as far off the roadway as practical. If it’s daylight, place warning triangles 30 metres in front of and behind the bus. In darkness or under other conditions of low visibility, place warning triangles 75 metres in front of and behind the bus. Whether you should evacuate the passengers from the bus depends on whether conditions are safer inside or outside the bus.
#18. To ensure smooth braking in any size vehicle, you should
Try to avoid sudden “panic” stops. Drive at a speed that gives you adequate time to respond smoothly to hazards. Maintain an adequate following distance behind the vehicle ahead, and increase your following distance even more under poor driving conditions. To brake, press the brake pedal gradually yet firmly. Just before your vehicle comes to a full stop, reduce the pressure you’re placing on the brake pedal. This will prevent your vehicle from jerking back, enabling you to make a smooth stop.
#19. How can you downgrade from a commercial licence to a non-commercial licence?
To downgrade from a commercial licence to a non-commercial licence, visit a driver licensing office to apply for the non-commercial licence.
#20. A tire that is overinflated or underinflated can
Underinflating a tire causes excess wear on the outer edges of its tread. Underinflation also causes increased flexing of the tire, which increases the chance of a blowout or even a fire from excessive heat buildup. Overinflating a tire causes excess wear in the centre part of its tread. Overinflation makes the tire more susceptible to damage from potholes or other road irregularities and increases the chance of tread separation and tire failure.