Alberta Class 1 Knowledge Practice Test 2026：第3套练习测试

Alberta Class 1 Knowledge Practice Test 练习测试第3套（共5套）：再练20道题，附答案和解释。

商用车辆
艾伯塔省
130道题
核对于2026年10月10日

第1题，共20题
The lights at a highway scale or inspection station are flashing. Which vehicles must report?
- Only vehicles over 30,000 kg
- All vehicles, including cars
- Vehicles over 4,500 kg
- Only buses
显示答案
答案: C. Vehicles over 4,500 kg
Vehicles over 4,500 kg must report to the scale when its lights are flashing.
第2题，共20题
Which national standard sets the cargo securement rules for trucks over 4,500 kg?
- The Canada Labour Code
- National Safety Code Standard 10
- The Fire Code
- National Safety Code Standard 13
显示答案
答案: B. National Safety Code Standard 10
Cargo securement for trucks registered over 4,500 kg follows NSC Standard 10.
第3题，共20题
What must cargo securement prevent?
- The receiver opening the trailer doors at delivery
- Cargo leaking, spilling, blowing off, falling or shifting
- The cargo being seen or counted by other drivers
- Cargo getting wet or dirty in rain or snow
显示答案
答案: B. Cargo leaking, spilling, blowing off, falling or shifting
Cargo must not leak, spill, blow off, fall or shift enough to affect the vehicle's stability.
第4题，共20题
What should you check before backing a tractor under a trailer?
- That the landing gear is fully raised off the ground
- That the trailer is chocked and the fifth wheel jaws are open
- That the air lines are already connected to the trailer
- That the trailer brakes are released so it can roll
显示答案
答案: B. That the trailer is chocked and the fifth wheel jaws are open
Chock the trailer, make sure the jaws are open, and inspect the apron, kingpin and collar.
第5题，共20题
While backing under the trailer, why do you stop just before contact?
- To lower the landing gear to the ground
- To check that the trailer is at the right height
- To rest and update your logbook
- To drain the air tanks before coupling
显示答案
答案: B. To check that the trailer is at the right height
Stop before contact and check that the heights match before coupling.
第6题，共20题
How do you confirm the fifth wheel is locked after coupling?
- Drive away fast and brake hard once
- Listen for the click, then drive away
- Ask someone to push the trailer from behind
- Do a firm tug test, then look to see the jaws are locked
显示答案
答案: D. Do a firm tug test, then look to see the jaws are locked
Do a firm tug test, then visually confirm the jaws are locked.
第7题，共20题
When uncoupling a trailer, what do you do before unlocking the fifth wheel?
- Release the tractor and trailer parking brakes
- Lower the landing gear and disconnect the lines
- Drive forward quickly to free the kingpin
- Raise the landing gear fully off the ground
显示答案
答案: B. Lower the landing gear and disconnect the lines
Park straight, set the brakes, chock, lower the landing gear and disconnect the lines before unlocking the fifth wheel.
第8题，共20题
When making up a combination with two trailers of different weights, where should the heaviest trailer go?
- In the middle of three trailers
- It does not matter
- Directly behind the tractor
- At the very back
显示答案
答案: C. Directly behind the tractor
Always hook the heaviest trailer directly to the tractor, with the lightest one furthest back.
第9题，共20题
What following distance does the Commercial Driver's Guide recommend for large vehicles in good conditions?
- At least four seconds
- At least one second
- At least two seconds
- At least ten seconds
显示答案
答案: A. At least four seconds
Use the four-second rule for large vehicles, and double it in poor conditions.
第10题，共20题
About how long is the air brake lag time?
- There is no lag
- About 0.04 seconds
- About 0.4 seconds
- About 4 seconds
显示答案
答案: C. About 0.4 seconds
Air brakes take about 0.4 seconds to apply after you press the pedal, on top of perception and reaction time.
第11题，共20题
How should you apply air brakes in a normal stop?
- By pressing hard and releasing fully, again and again
- By pumping the pedal quickly to build pressure
- With the trailer hand valve only, to save the tractor brakes
- With even pressure, easing off as you slow, without pumping
显示答案
答案: D. With even pressure, easing off as you slow, without pumping
Apply with even pressure, ease off as the vehicle slows, and do not pump air brakes, which wastes air.
第12题，共20题
Before going down a long hill, what should you do?
- Turn off the engine brake to save the engine
- Downshift before the crest and test your brakes
- Shift to neutral at the top to save fuel
- Speed up so the descent takes less time
显示答案
答案: B. Downshift before the crest and test your brakes
Downshift before the crest, use engine compression and test the brakes before descending.
第13题，共20题
Why should you not rely on the trailer hand valve alone to slow down?
- It is illegal to touch it while moving
- It uses too much fuel
- It turns off the trailer lights
- It can cause brake imbalance and a jackknife
显示答案
答案: D. It can cause brake imbalance and a jackknife
Using only the trailer brakes, especially on hills, can unbalance braking and lead to a jackknife.
第14题，共20题
Above what weight must a trailer have brakes that the driver can control?
- 2,300 kg
- 500 kg
- 4,600 kg
- 910 kg
显示答案
答案: A. 2,300 kg
Do not tow a trailer over 2,300 kg unless it has brakes the driver controls.
第15题，共20题
How should you enter a curve in a heavy truck?
- In neutral, so the trailer can roll freely
- Faster than normal, to keep your momentum
- At the posted speed, braking hard in the middle
- Slowly enough that you do not need to brake in the curve
显示答案
答案: D. Slowly enough that you do not need to brake in the curve
Enter curves at a speed that needs no braking. Too much speed can cause skids, rollovers or jackknifes.
第16题，共20题
When parking on a hill with a curb, how close to the curb must your wheels be?
- No more than 1 m
- No more than 50 cm
- Touching the curb
- No more than 2 m
显示答案
答案: B. No more than 50 cm
Park with your wheels no more than 50 cm from the curb.
第17题，共20题
Before reversing a large vehicle, what should you do?
- Back up at normal speed to clear traffic fast
- Rely on other drivers to stop and wave you back
- Sound the horn and back slowly, checking your mirrors
- Turn off your mirror heaters and back up quickly
显示答案
答案: C. Sound the horn and back slowly, checking your mirrors
Reverse slowly, check mirrors and sound the horn before reversing. Get out and look when you need to.
第18题，共20题
This diagram shows a tractor-trailer's no-zones. Where can a car be completely hidden from the driver?
- Two lanes to the left, well ahead
- Far ahead of the truck in the same lane
- Beside the trailer on the right side
- Parked on a side street
显示答案
答案: C. Beside the trailer on the right side
The right-side no-zone is the largest and can hide a car beside the trailer.
第19题，共20题
Your truck breaks down outside an urban area in daylight. Where do you place warning devices?
- About 30 m in front of and behind the vehicle
- On the roof of the cab, where they can be seen
- Right beside the truck, on the traffic side only
- About 500 m behind the truck only
显示答案
答案: A. About 30 m in front of and behind the vehicle
Turn on the hazard lights and place an approved warning device about 30 m in front and behind.
第20题，共20题
What is the maximum speed for a long combination vehicle (LCV) in Alberta?
- 110 km/h on divided highways
- 90 km/h on all roads, whatever is posted
- The posted limit plus 10 km/h
- 100 km/h, or the posted limit if lower
显示答案
答案: D. 100 km/h, or the posted limit if lower
LCVs may not go faster than 100 km/h or the posted limit, whichever is lower.

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