ICBC Heavy Trailer Endorsement (Code 20) Practice Test

These questions are part of the practice quiz. Start practicing

• What can severe movements from livestock in a trailer lead to?
• How often should drivers re-inspect their cargo securement system during a trip?
• What is dunnage used for in cargo transport?
• How frequently must a driver take 24 consecutive hours of off-duty time, regardless of the cycle?
• For which type of trailer connection are safety chains or cables required?
• When must a driver take 24 consecutive hours of off-duty time while operating in Cycle 2?
• When backing up, what should you primarily focus on to avoid jackknifing?
• What precaution should a driver take when blocking off more than one lane for a sharp turn?
• If the vehicle speed is increased by 4 times, how much stopping power is necessary?
• What prevents total loss of air pressure in the service brake system if an air line ruptures?
• What causes brake fade?
• Where should the majority of the weight of a load on a semi-trailer be placed?
• What is the fine for operating a commercial vehicle with improperly adjusted brakes?
• What is one advantage of a dual air brake system?
• What is the primary function of the tractor protection system?
• What should you do after shifting to a higher gear during an upshift?
• Who is ultimately responsible for the brakes on a vehicle?
• When must you submit your RODS to the carrier?
• What item is necessary to inspect brake components during a slack adjustment check?
• What happens if you exceed your maximum on-duty hours and an enforcement officer stops you?
• What should you check regarding brake drums during an air brake pre-trip inspection?
• How does a spring parking brake function?
• When coupling a tractor to a semi-trailer, when should the air lines be connected to the trailer?
• How does the combination of increased speed and weight affect stopping distance?
• What can often cause jackknifing in trailers?
• What is one of the hazards associated with stopping a tractor/trailer combination?
• What is a primary reason that braking forces may not be evenly distributed in a tractor/trailer combination?
• When must you complete a pre-hill inspection?
• What is a risk of driving with underinflated tires?
• What is required before transporting oversize or overweight loads?
• Before beginning a long drive, which item is crucial for fuel efficiency?
• What reliability feature do spring parking brakes offer?
• What class of license is required to operate a trailer equipped with air brakes weighing over 4,600 kg?
• Why should a commercial vehicle travel in the right (slower) lane of traffic?
• How is a defective tire defined?
• In terms of vehicle safety, why is it crucial to understand the relationship between speed, weight, and stopping power?
• In the event of a rupture in the secondary system of a dual air brake system, what happens?
• To assist other drivers when they wish to pass, you should:
• Which condition can increase the length of your danger zone while driving?
• What is the primary purpose of hours of service regulations for commercial drivers?
• Why are air brakes used on heavy commercial vehicles instead of hydraulic brakes?
• What is a danger of having excessive pushrod travel when brake drums are cold?
• What is the maximum on-duty time allowed in Cycle 1 for commercial drivers?
• What should be checked to ensure trailer connections are secure?
• Which of the following best describes the effect of a lighter load on vehicle wheels?
• What should you consider when planning a fuel-efficient route?
• How do wedge brakes operate?
• What is the impact of exceeding maximum allowable driving hours?
• What constitutes a tiedown assembly?
• At what brake application pressure is the steering axle brake pressure approximately equal to the drive axle brake pressure?
• When upshifting, what should you do after releasing the accelerator?
• Where is the central weight distribution point located on a single-unit truck?
• What types of loads must be covered with a tarp?
• What is the purpose of blocking the wheels of a trailer that will be left for any length of time?
• What can happen to cyclists near a large vehicle due to air turbulence?
• What is a common indicator of brake fade?
• What is the implication of high vehicle speed on stopping distance?
• What is the significance of knowing the gross vehicle weight (GVW) of a truck?
• How frequently should drivers assess their duty status during a trip?
• If a vehicle weighs 3,000 lbs and the stopping power required is X, what is the stopping power required for a 6,000 lb vehicle under the same conditions?
• What is an advantage of using automatic slack adjusters?
• What is the benefit of regular pre-trip inspections?
• Which of the following describes a load binder?
• What occurs when air pressure in the braking system falls below 60 p.s.i.?
• What is the recommended action when brake pressure is lost on a heavy trailer?
• When should the air lines be unhooked to uncouple a tractor from a semi-trailer?
• What is the minimum consecutive hours of off-duty time required to reset the Cycle 2?
• What can happen if rear wheels run over curbs during sharp right turns?
• What is the primary purpose of a load binder?
• What does ATC stand for in relation to braking systems?
• What is the key factor for the effectiveness of tiedowns?
• Why is it critical to check slack adjustment in a vehicle?
• What is a potential danger of transporting livestock?
• What is the maximum on-duty time allowed in Cycle 2 for drivers?
• What is the maximum length that a load may project to the rear of a vehicle?
• Do load limit signs on bridges apply to all vehicles on the road?
• Which types of vehicles require an air brake endorsed driver's license to operate?
• Which types of commercial vehicles are required to carry fire extinguishers?
• How many tiedowns are recommended for the first 3.04 meters of a load?
• What is the characteristic of an air-over-hydraulic braking system?
• Why is it important for a driver to know the height and width of their vehicle?
• Which is NOT a step to obtain an air brake endorsement?
• How can you tell if you're turning the adjusting bolt in the correct direction?
• Why are drivers required to complete a trip inspection report?
• What are the two main methods of securing cargo for transportation?
• What must the extremities of an oversize vehicle or load be marked with during transport?
• Which type of vehicles must stop at uncontrolled railroad crossings?
• Why is it important to protect tiedowns from rubbing against the load?
• How should you handle downshifting to ensure proper gear change?
• Are drivers allowed to log time spent napping in a reclining seat as sleeper berth time?
• What is ABS in braking systems?
• What must a driver consider before approaching a narrow bridge?
• What class of driver's license allows you to operate a school bus?
• Is it a good idea to leave the engine running when you're not driving?
• What effect does fatigue have on drivers' crash likelihood?
• During an emergency stop, at what application pressure does the steering axle begin to receive some braking pressure?
• Which of the following can prevent brake fade?
• How long should you let a diesel engine idle when you first start it?
• How can you determine the amount of air pressure in the main reservoirs?
• Which feature is not typically designed to improve truck aerodynamics?
• What happens if the load is not adequately secured during transport?
• Which of the following are smart driving techniques that can save fuel?
• Why is it important to consider both vehicle speed and weight when assessing stopping power?
• How many consecutive hours of off-duty time are required for commercial drivers each day?
• What factors determine the maximum allowable GVW for a vehicle?
• What is the primary method for releasing the spring parking brake in a heavy trailer?
• What are the five components of a simple air brake system?
• What condition must the glad hands and air lines meet during the air brake inspection?
• What should you observe to confirm the condition of your vehicle during a trip?
• What should be considered when placing a load on a single-unit truck?
• If a driver applies 20 pounds of brake application using the hand valve, which brakes are engaged?
• What is a converter dolly used for?
• How can you verify that the fifth wheel jaws have locked to the trailer pin?
• What factors determine the amount of off track a vehicle will have?
• Which statement is true about the minimum licensed GVW for commercial vehicles?
• What driving behavior can lead to reduced fuel consumption?
• Why is it important to avoid compounding the brakes?
• Which of the following scenarios requires the highest stopping power?
• What primarily determines if a vehicle will move?
• What does Automatic Traction Control detect?
• When weight is doubled, what is the effect on required stopping power compared to the original?
• What type of lights are required on the extremities of an oversize load for night travel?
• What should drivers do when negotiating curves with their vehicles?
• What is the required stopping power when both vehicle speed and weight are doubled?
• What should a driver NOT do when negotiating a sharp turn while blocking lanes?
• What should you do before making a turn to ensure safety?
• Why is it important to compare the weight of your load to the strength of your tiedowns?
• What happens if the control line to the trailer disconnects while driving?
• What actions should you take if your trailer whips or swerves?
• What is the purpose of the quick release function in an automatic front wheel limiting system?
• What is brake lag time?
• What are some aerodynamic features of new trucks that improve fuel efficiency?
• What could be a result of combining air brake application with spring force?
• What should you do if the low pressure warning indicator activates?
• What distance should warning devices be placed from a disabled vehicle?
• What initial action is taken during a pre-trip inspection of brakes?
• What is the consequence of not using sufficient tiedowns?
• What is a key feature of a converter dolly?
• What condition may require the use of a pilot car when transporting an oversize load?
• What is a recommended practice before backing up?
• What is an indication that the compressor and governor are operating correctly?
• Are wide load signs allowed to be displayed on a vehicle when a wide load isn't being transported?
• When preparing to measure slack adjustment, what is the first action you should take?
• If the weight of a vehicle is doubled, how many times must the stopping power be increased?
• Which braking strategy can help avoid longer stopping distances?
• If your commercial vehicle becomes disabled on the road, what is your first step?
• Is an additional coupling device such as a chain or cable required when a coupling device other than a fifth wheel is used to join vehicles?
• What is the significance of adhering to hours of service regulations?
• What would happen if a driver fails to adjust their stopping power according to changes in weight and speed?
• Are heavy noncommercial vehicle drivers required by law to stop and check their brakes?
• Understanding the calculations involved in stopping power can improve what aspect of driving?
• What should you do to check for any air leaks from the air brake system?
• What rule should be followed to maintain a safe following distance when operating a taxi or ambulance?
• What is the safe working load of a tiedown?
• What percentage of drive axle pressure is typically delivered to the steering axle brakes below 40 p.s.i.?
• What could be a consequence of placing too much weight over any one set of wheels or axle?
• How much pressure should you apply to the foot valve when measuring slack adjustment?
• What is the maximum driving time allowed for commercial drivers in a single day?
• What is the safest driving practice regarding speed and load management?
• Whose responsibility is it to ensure the brakes are in working order before a vehicle operates?
• When is it recommended to use a retarding device?
• Doubling both speed and weight requires how much stopping power compared to the original?
• When you enter a curve too quickly and brake, what risk do you face?
• What is the maximum legal width for a vehicle on a highway?
• Approximately how much better fuel economy can you achieve by using good driving techniques?
• What does a load cover help prevent?
• Which action indicates that the fifth wheel release handle is in the locked position?
• Where is an air dryer installed in an air brake system?
• What is an example of a smart technique to save fuel while driving?
• When should you check for air leakage during a pre-trip inspection?
• Which of the following statements is true regarding sleeper berth time?
• Which condition could result from improper weight distribution on a vehicle?
• What is a danger of allowing the rear wheels of a vehicle to cross the center line when making a left turn?
• What items should you check during vehicle inspections that affect fuel efficiency?
• What is the maximum length permitted for a draw bar or coupling device between vehicles, except for a pole trailer?
• What happens if brakes become too hot?
• If the vehicle speed is doubled, how much more stopping power is required?
• How many consecutive hours of off-duty time must be taken to reset the cycle in Cycle 1?
• To minimize risks while backing up, a driver should first:
• When is it particularly important for a driver to use extreme caution during a turn?
• What is the recommended following distance rule for buses, trucks, or truck-tractors?
• What can cause your trailer to jackknife when backing up?
• Is it mandatory for all commercial vehicles to report to weigh scales?
• How is brake heat primarily dissipated?