Class 1 Mock
#1. Where is a single-unit (straight) truck’s central weight distribution point?
The central weight distribution point of the average single-unit (straight) truck is located partially over or just ahead of the rear axles. That is where the load should be placed.
#2. What effects can a poorly distributed load have on your vehicle?
A poorly distributed load can adversely affect your vehicle’s handling. It can also overload an axle or set of tires, put unnecessary stress on your vehicle’s frame and cause permanent damage and steering misalignment.
#3. You’re driving a vehicle equipped with an automatic front-wheel limiting system (ratio valve). If you brake hard during an emergency stop, the air pressure delivered to the front brakes will be approximately _____ of the air pressure to the rear brakes.
The front-brake limiting effect is greatest for brake application pressures below 40 psi (276 kPa). At brake application pressures over 60 psi (414 kPa), there is no limiting effect; the air pressure delivered to the front brakes equals that delivered to the rear brakes.
#4. You are uncoupling your tractor from the semitrailer. After you have eased pressure on the fifth wheel locking jaws, you should do which of the following?
After you have eased pressure on the fifth wheel locking jaws, block (chock) the trailer wheels as a precaution even if you’re sure that the trailer brakes are set. Then lower the trailer landing gear until both supports touch the ground and pressure is released off the fifth wheel. Disconnect the air lines and electrical cable and secure them to the tractor. Finally, pull the fifth wheel release handle to unlock the fifth wheel jaws. At this point, you are ready to pull the tractor forward just enough so you can make sure that the landing gear is supporting the trailer.
#5. To turn right safely, what should you do?
When turning any vehicle, you should always check your blind spots thoroughly. Also, the rear wheels of a vehicle with a long wheelbase can off-track (travel a different path than the front wheels). If you turn too sharply to the right, the rear wheels may scrape the curb or overrun the sidewalk. And if you turn too wide, pedestrians or vehicles may be encouraged to squeeze by you on the right. When turning, therefore, make certain that you’re not crowding any vehicles or pedestrians on the right side.
#6. When approaching an intersection at which you intend to turn, you should
When approaching an intersection, don’t change lanes or pass or overtake other vehicles. If you intend to turn at the intersection, get in the proper lane well before the intersection and signal other drivers to show them you intend to turn. Reduce your speed gradually before entering the intersection.
#7. After you __________, you must take at least eight consecutive hours of off-duty time.
Hours of service regulations are designed to limit the time you can spend driving. Statistics show that a fatigued driver is more likely to become involved in a crash. After driving for 13 hours or being on duty for 14 hours, you may not drive again until you have taken 10 hours of off-duty time, of which eight hours must be consecutive.
#8. If your truck is transporting cargo, you must check the securement of the cargo within the first ______ of the trip.
Drivers of trucks transporting cargo must inspect the securement of the cargo within the first 80 km of a trip. From then on, the driver must re-inspect the securement on a regular basis at the earliest of (a) three hours of driving, (b) 240 km of driving, or (c) a change in the driver’s duty status
#9. What is brake lag time?
When you press the brake pedal, some type of force must be transmitted to the brakes to make them work. Hydraulic brake systems use brake fluid. Because brake fluid cannot be readily compressed, force is transmitted immediately to each brake when you press the brake pedal. Air brake systems use compressed air to produce the force that applies the brakes at each wheel. When you press the brake pedal, compressed air must flow from one part of the system to another. Unlike brake fluid, air is compressible, resulting in a delay of up to 0.4 seconds from the moment you apply or release the brake pedal to the moment that the brakes respond accordingly.
#10. The working load limit of tiedowns used to secure cargo must be at least _____ of the cargo weight.
The working load limit of tiedowns used to secure cargo must be at least 50 percent of the cargo weight.
#11. Which of the following is true about B-train couplings?
In a B train, the converter is part of the lead trailer. The fifth wheel assembly sits on the rear axle of the lead trailer. No converter dolly is required because the second unit connects directly to the extended frame of the lead unit.
#12. You’re driving on a curve to the left. How can you ensure that your trailer’s wheels stay in your lane?
When you curve to the right, keep the front wheels close to the centre line of the roadway to keep your rear wheels from drifting onto the shoulder or off the pavement. When curving to the left, keep the front wheels close to the right edge of your lane to keep your driver’s-side rear wheels from drifting into the lane to your left.
#13. When crossing railway tracks, you should
Do not shift gears while crossing railway tracks; shifting gears would increase your chance of stalling on the tracks. Unless the crossing signals or flag person are warning of an approaching train, you don’t have to stop at the railway crossing unless you’re carrying a load of dangerous goods.
#14. Under British Columbia law, what is the definition of a “taxi”?
Under British Columbia law, a “taxi” or “limousine” is defined as a motor vehicle that is designed to carry no more than 10 persons, and is available with its driver for hire. This includes a vehicle being used as part of a ride-hail service.
#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. 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.
#17. When is an engine retarder most efficient?
An engine retarder is more efficient at a higher engine rpm and a lower vehicle speed, so it’s important to select the right gear. Select your gear before you start down a hill. You’re more likely to miss a shift if you wait until you’re on the downgrade.
#18. What is the Gross Vehicle Weight Rating (GVWR)?
The Gross Vehicle Weight Rating (GVWR) is a manufacturer’s rating that defines the combined weight of a vehicle and the maximum load it should carry.
#19. Which of the following statements are true about timber used as dunnage?
The tiedowns may have to withstand forces up to 0.8 g. Any timber used as dunnage, chocks or cradles for blocking or bracing must be strong enough that it will not be split or crushed by the cargo or the tiedowns. Note: In this context, “1 g” means the acceleration of one Earth gravity (9.8 metres/second²) – NOT one gram.
#20. Which of the following can increase the danger of crossing railway tracks?
Railway crossings can be hazardous. You want to minimize the time you spend there. Still, it takes a typical tractor-trailer more than 10 seconds to clear a single railway track. And it can take even longer if the crossing surface is rough, there is more than one track to cross, your vehicle is extremely heavy or long, or the approach grades to the tracks are steep (which can cause a low-slung vehicle to get hung up on the tracks altogether).
#21. To inspect an air brake system, you should wear
The compressed air that is used in air brake systems can be hazardous if you get near it when it is being exhausted from the vehicle. Compressed air leaving the vehicle travels at a very high speed and carries moisture, oil, dirt and dust. Plus there is always the chance of an accident in procedures that require you to release the brakes and crawl underneath your vehicle to inspect various items. While you’re inspecting the air brakes, wear a bump cap or hard hat, safety glasses, a visible safety vest, and steel toe boots.
#22. 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, and (c) limited passenger vehicles that have an authorized seating capacity of more than 10. Vehicles transporting explosives are required to carry two fire extinguishers.
#23. In large commercial vehicles, most air brake systems use automatic valves to
Most modern tractors are equipped with an automatic front axle ratio valve, which supersedes the manual front brake limiting valve in older tractors. In light-to-moderate braking, the ratio valve automatically reduces air pressure (and hence braking force) to the front wheels to reduce the chance of front-wheel lockup (which could result in a skid) on slippery roads.
#24. When you’re driving on a slippery road, hard braking may cause
If you brake hard on a slippery road, the force of the brakes may overcome the reduced traction of the tires. The wheels will lock and the vehicle may skid. If the rear of your trailer swings out, a jackknife is likely. A skid or jackknife may also occur if you use the trailer hand valve to brake (because it only brakes the trailer, not the tractor).
#25. 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.
