Class 1 Mock
#1. Reducing a tire’s air pressure when it is hot
When tires get hot, the air pressure increases. However, relieving that extra pressure may leave the air pressure too low when the tires cool again, and then the tires may catch fire or blow out. If your tires are too hot to touch, stop until they have cooled down.
#2. What is the purpose of the slider on a trailer?
On many trailers, the driver can slide the tandem axles forward and backward to adjust the weight distribution of the trailer. Sliding the tandems forward puts more weight on the tandems and less on the tractor’s rear axles. Sliding the tandems backward puts more weight on the tractor’s rear axles and less on the tandems.
#3. Which of the following can increase the length of your danger zone (as defined in the British Columbia Driving Commercial Vehicles Manual)?
The section of road that your vehicle travels through before it can stop is called the vehicle’s danger zone, because it’s physically impossible for you to stop the vehicle in time to avoid a collision with any object or person. As your speed increases, the length of your danger zone increases. Less than ideal road conditions, such as rain, snow, ice or gravel increase the length of your danger zone. Driving fast under these road conditions increases your danger zone even more. Finally, heavy commercial vehicles have more kinetic energy than cars travelling at the same speed and therefore take longer to brake to a stop
#4. Where are a large vehicle's blind spots?
A large vehicle’s blind spots exist to the front, rear, and both sides of the vehicle. If a nearby bicycle or vehicle seems to suddenly disappear, it may have moved into one of your blind spots. Use caution.
#5. If your brakes get wet, what should you do?
During extremely wet conditions, or after driving through water, test your brakes by applying slight pressure with your foot to the brake pedal. Keep this pressure on for a short distance. The resulting heat will dry out the brakes.
#6. Where would an air dryer be installed in an air brake system?
An air dryer may be installed in the compressor discharge line between the compressor and the first reservoir. Its purpose is to remove water vapour and contaminants from compressor air before the air enters the first reservoir. The first reservoir has usually been the supply or “wet” reservoir, so called because moisture accumulated in that reservoir before the air flowed from there to the service reservoirs. However, today’s air dryer technology is so effective that a “wet” reservoir may not be needed anymore. In a modern Air Dryer Integrated System (ADIS), the air compressor governor and the air dryer are combined into a single unit. Air from the air dryer goes directly into the primary and secondary service (“dry”) reservoirs.
#7. What is the purpose of checking your vehicle's slack adjusters?
It’s critical that you inspect your brakes as part of the pre-trip inspection. Brakes that are out of adjustment may fail to stop your vehicle safely, possibly resulting in a dangerous collision. Federal and provincial laws require you to check manual and automatic slack adjusters daily, during the pre-trip inspection. You may be fined as much as $2,000 for driving a vehicle with defective brakes. This includes excessive brake chamber pushrod stroke
#8. When can flashing amber lights be mounted on a vehicle?
Flashing amber lights are used on construction vehicles, towing vehicles, tow cars that are attending, snow-removal equipment, sanding equipment, pilot cars, and vehicles that are required by permit to use them, such as some oversize vehicles or vehicles carrying oversize loads. If your vehicle is going to haul an oversize load, obtain a Commercial Vehicle Safety & Enforcement permit from ICBC. This will allow you to mount flashing amber or red lights on your vehicle as well as the appropriate oversize signs.
#9. What is a "glad hand"?
Because tractors and trailers need to be disconnected and reconnected from time to time, the air lines are equipped with quick coupling devices called glad hands. Each coupler resembles a human hand about to make a handshake.
#10. A tractor-trailer travelling at high speeds creates air turbulence in which of the following areas?
Large vehicles travelling at high speeds create air turbulence that can be hazardous to smaller vehicles. A tractor-trailer creates air turbulence directly in front of the truck, alongside the cab, by the rear area of the trailer, and at the immediate rear of the trailer.
#11. In determining how well your air brake system works, which is NOT a significant factor?
The faster you drive or the greater your vehicle’s weight, the longer your braking distance will be. A fully loaded tractor-trailer can weigh over 36 metric tons. The weight of a 180-pound man is only a fraction of one percent of that, so the effect should be insignificant.
#12. Every motor vehicle must be equipped with at least ______ separate braking systems.
Every motor vehicle must be equipped with at least two separate braking systems. One braking system must be mechanical, such as a ratchet and pawl (notched wheel) mechanism or a spring brake mechanism. The mechanical system should be used as a backup in case the primary braking system fails.
#13. How should you handle driving around a curve?
To handle a curve, slow down before you enter the curve so that you will not need to brake in the curve. Braking in a curve can cause a skid. On slippery roads, slow down even more. Once you are in the curve, accelerate slightly through the curve. This will help you keep control.
#14. Load binders are used for what purpose?
A load binder is used to tighten a tiedown chain. Some load binders are tightened with a lever; others use a ratchet mechanism.
#15. If your vehicle becomes disabled, what should you do?
If your vehicle becomes disabled, move it as far off the travelled portion of the highway as possible. Under the British Columbia Motor Vehicle Act, you must place warning devices approximately 30 metres ahead of and 30 metres behind the vehicle. However, it’s good safety practice to also place additional warning devices farther than 30 metres from your vehicle.
#16. To drive defensively, you should
Defensive driving is about anticipating potentially dangerous situations in advance, including driving conditions and mistakes made by others, and planning how to deal with those situations. To drive defensively, constantly scan the traffic ahead, behind and to your sides. Look ahead for clues that will tell you whether other vehicles are about to change speed or stop. For example, a green light that is stale may change to red at any moment, so be prepared to stop. Frequent checks of your rear- and side-view mirrors will alert you to drivers who are passing you or getting ready to pass you.
#17. When parking a vehicle with a two-speed axle, in which range should you leave the axle?
If your vehicle is so equipped, a two-speed drive axle allows you to select a lower gearing for greater torque at lower speeds. When you park your vehicle, you want maximum torque from both the transmission and the two-speed drive axle to prevent your vehicle from rolling, should its brakes fail. Place the transmission in the lowest forward gear, if parked facing uphill, or reverse gear (which is also a low gear) if parked facing downhill, or park if the vehicle has an automatic transmission. If the vehicle has main and auxiliary transmissions, place both in gear. If the vehicle is equipped with a two-speed axle, the axle should be in low range.
#18. If you place a very heavy load on one side of a vehicle, what may happen?
If you place a very heavy load on one side of a vehicle, the brakes may lock the wheels on the underloaded side, which might cause the tires to skid on wet surfaces. It may also cause flat spots on the tires. Furthermore, the vehicle’s centre of gravity (i.e., the midpoint of its weight) will shift toward the side with the load, increasing the risk of a rollover
#19. If your cable tiedowns are not marked with their safe working load limits, what should you do?
According to National Safety Code Standard 10 (Cargo Securement), you may not use a tiedown or a component of a tiedown to secure cargo to a vehicle unless it is marked by the manufacturer with respect to its working load limit.
#20. When can your vehicle be inspected on a highway?
At any time, the authorities can pull you over and proceed to inspect parts of your vehicle.
#21. If a fire starts in your vehicle, you should do which of the following?
If a fire starts in your trailer, don’t open the trailer doors; the additional oxygen will make the fire worse. Likewise, if a fire starts under the hood, don’t open it. Putting water on gasoline, grease or oil fires will only spread the fire farther. Instead, use a fire extinguisher that is rated for Class B (flammable liquid) fires. Use enough extinguishing material to put out the flames, but try to keep some in reserve in case the fire flares up again.
#22. Before you enter a curve, what gear should you select?
Before you enter a curve, slow to a safe speed and downshift to a gear that lets you use engine power all through the curve. This will keep your vehicle stable and provide good acceleration as you leave the curve.
#23. During a pre-hill inspection of a vehicle equipped with hydraulic brakes, you should do which of the following?
Whether your vehicle has air brakes or hydraulic brakes, it is important to make sure that the brake drums haven’t overheated. To test hydraulic brakes for leaks, first pump the brakes three times. Next, apply firm pressure to the brake pedal for five seconds. The pedal should not move. If it moves, the brakes may have a leak or some other problem.
#24. According to the British Columbia Driving Commercial Vehicles Manual, torque is
According to the British Columbia Driving Commercial Vehicles Manual, torque is the ability of the engine to move the vehicle, and horsepower is used to develop speed. More specifically, in an internal-combustion engine, torque is the rotational force that is produced by the engine’s crankshaft.
#25. A tire that is overinflated or underinflated can
Underinflating a tire causes excess wear on the outer edges of its tread. Underinflation also increases the chance of a blowout or even a fire from excessive heat buildup resulting from increased flexing of the tire. 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.