Alberta Class 1 Knowledge Practice Test 2026: Test de práctica 4

Test de práctica 4 de 5 de Alberta Class 1 Knowledge Practice Test: 25 preguntas más con respuestas y explicaciones.

Vehículo comercial
Alberta
130 preguntas
Revisado el 10 de octubre de 2026

Pregunta 1 de 25
Before starting the air brake test, how should the vehicle be secured?
- Release all brakes
- Leave it in neutral without chocks
- Park on a hill facing down
- Park on level ground and chock the wheels
Ver respuesta
Respuesta: D. Park on level ground and chock the wheels
Secure the vehicle with wheel chocks on level ground before testing the brakes.
Pregunta 2 de 25
In which languages is the Alberta air brake knowledge test offered?
- English, French and Punjabi
- English and French
- English only
- Any language with a translator
Ver respuesta
Respuesta: C. English only
The electronic test is in English only. Paper and translated versions are not offered.
Pregunta 3 de 25
In an S-cam brake, what forces the brake shoes against the drum?
- A hydraulic cylinder
- Magnets
- The driver's leg strength
- The S-shaped cam turning
Ver respuesta
Respuesta: D. The S-shaped cam turning
When the camshaft turns, the S-cam spreads the shoes against the drum.
Pregunta 4 de 25
According to the Commercial Driver's Guide, about how long does it take a driver to perceive a hazard?
- About 0.1 seconds
- About 0.75 seconds
- About 5 seconds
- About 3 seconds
Ver respuesta
Respuesta: B. About 0.75 seconds
Perception time is about 0.75 seconds, and reaction time is about another 0.75 seconds.
Pregunta 5 de 25
A farmer applies for Class 1 to drive a farm-registered tractor-trailer. Does the farmer need air brake training?
- No, farm-registered vehicles are always exempt
- Yes, Class 1 applicants must show air brake training
- Only if the farmer drives in a city
- Only for trailers longer than 53 feet
Ver respuesta
Respuesta: B. Yes, Class 1 applicants must show air brake training
Class 1 applicants must show proof of air brake training even when the vehicle is registered as a farm vehicle.
Pregunta 6 de 25
In the applied leakage check with full brake application, what is the most a power unit alone may lose in 2 minutes?
- 4 psi
- 1 psi
- 20 psi
- 10 psi
Ver respuesta
Respuesta: A. 4 psi
The guide allows a loss of 4 psi in 2 minutes for a power unit, plus 2 psi for each trailer.
Pregunta 7 de 25
Why do air tanks have drain valves?
- To check the tire pressure at each wheel
- To release the parking brakes by hand
- To let fresh air into the tanks
- To remove water and oil that collect in the tanks
Ver respuesta
Respuesta: D. To remove water and oil that collect in the tanks
Compressed air leaves water and oil in the tanks. Drain them so they do not freeze or damage valves.
Pregunta 8 de 25
Why is moisture in the air system a problem?
- It makes the brakes grab too strongly
- It cools the compressor too much in summer
- It can freeze and block lines and valves
- It is not a problem in a modern system
Ver respuesta
Respuesta: C. It can freeze and block lines and valves
Water can freeze and stop valves or lines from working. Drain tanks and use the air dryer.
Pregunta 9 de 25
In the Alberta trip test, what is the normal range for governor cut-out pressure?
- 90 to 100 psi
- 60 to 80 psi
- 150 to 175 psi
- 120 to 135 psi
Ver respuesta
Respuesta: D. 120 to 135 psi
The governor should cut out between 120 and 135 psi.
Pregunta 10 de 25
What happens when you press the brake pedal (foot valve) in an air brake system?
- Air is sent to the brake chambers, which apply the brakes
- The spring brakes release so the wheels can turn
- The compressor stops and the tanks are sealed
- Air is released from the tires to slow the wheels
Ver respuesta
Respuesta: A. Air is sent to the brake chambers, which apply the brakes
The foot valve sends air from the tanks to the brake chambers, which push the rods that apply the brakes.
Pregunta 11 de 25
What must you show at the registry agent before you can write the air brake knowledge test?
- A letter from your employer or school
- Your truck's registration and insurance
- Your Notice of Air Brake Program Completion
- Your Class 1 road test result
Ver respuesta
Respuesta: C. Your Notice of Air Brake Program Completion
Bring the Notice you received after passing the practical assessment.
Pregunta 12 de 25
Brake lag means the brakes on an air-brake vehicle take time to apply. What does this mean for following distance?
- You can follow more closely
- Following distance does not matter
- You should brake later
- You need more space ahead than a car does
Ver respuesta
Respuesta: D. You need more space ahead than a car does
Air brake lag adds to your stopping distance, so leave a bigger gap.
Pregunta 13 de 25
What does the safety valve do?
- Applies the brakes when you go too fast
- Releases air if tank pressure gets too high
- Removes water and oil from the tanks
- Stops the engine if the air gets too hot
Ver respuesta
Respuesta: B. Releases air if tank pressure gets too high
The safety valve protects the tanks from too much pressure by letting air out.
Pregunta 14 de 25
What is the main safety feature of spring brakes?
- They only work at high speed on highways
- They apply automatically if air pressure is lost
- They replace the service brakes when driving
- They need extra air pressure to apply
Ver respuesta
Respuesta: B. They apply automatically if air pressure is lost
Air holds spring brakes off. If pressure is lost, the springs apply the brakes.
Pregunta 15 de 25
What is the best way to check whether a brake is out of adjustment?
- Feel the tire temperature after a trip
- Look at the paint on the brake drum
- Listen to the brake while driving slowly
- Measure the push rod stroke with the brakes applied
Ver respuesta
Respuesta: D. Measure the push rod stroke with the brakes applied
Brake adjustment is checked by measuring push rod stroke with a full brake application.
Pregunta 16 de 25
As you lower the air pressure during the trip test, at what pressure should the park control valve pop out?
- It should never pop out
- Between 60 and 80 psi
- Between 20 and 45 psi
- Between 100 and 120 psi
Ver respuesta
Respuesta: C. Between 20 and 45 psi
The park control valve should pop out between 20 and 45 psi, applying the spring brakes.
Pregunta 17 de 25
In the applied leakage check, what is the most a tractor with one trailer may lose in 2 minutes under the guide's figures?
- 12 psi
- 2 psi
- 4 psi
- 6 psi
Ver respuesta
Respuesta: D. 6 psi
The guide allows 4 psi for the power unit plus 2 psi for each trailer, so 6 psi for a tractor and one trailer.
Pregunta 18 de 25
How quickly should the compressor build pressure from 50 to 90 psi at the governed engine speed?
- Within 10 seconds
- Within 3 minutes
- Within 10 minutes
- Within 30 minutes
Ver respuesta
Respuesta: B. Within 3 minutes
Compressor build-up from 50 to 90 psi should take no more than three minutes.
Pregunta 19 de 25
How long is the minimum classroom session in the Alberta Air Brake Program?
- 1 hour
- 40 hours
- 3 hours
- 6.5 hours
Ver respuesta
Respuesta: D. 6.5 hours
The classroom session is at least 6.5 hours.
Pregunta 20 de 25
Why should you not pump air brakes during a normal stop?
- Pumping wastes air and lowers system pressure
- It is the only way to stop
- It locks the steering
- It makes the brakes too hot to touch
Ver respuesta
Respuesta: A. Pumping wastes air and lowers system pressure
Apply steady pressure and ease off as you slow. Pumping uses up air.
Pregunta 21 de 25
Do you need a road test to get the Q endorsement?
- No
- Yes, in a tractor-trailer
- Only if you are under 21
- Yes, in a bus
Ver respuesta
Respuesta: A. No
A practical road test is not required for the air brake endorsement.
Pregunta 22 de 25
Which colour is usually used for the emergency (supply) air line between tractor and trailer?
- Red
- Yellow
- Blue
- Green
Ver respuesta
Respuesta: A. Red
The emergency or supply line is usually red and the service line is blue.
Pregunta 23 de 25
What happens in the practical training part of the program?
- You take apart and rebuild a spring brake chamber
- You drive an air-brake truck on a highway for an hour
- You watch an air brake video at home and sign a form
- A 15-minute demonstration, then you practise the pre-trip twice
Ver respuesta
Respuesta: D. A 15-minute demonstration, then you practise the pre-trip twice
Practical training is a 15-minute demonstration followed by two practice pre-trip inspections.
Pregunta 24 de 25
How should you park an air-brake vehicle?
- Apply the spring (parking) brakes
- Put a brick on the brake pedal
- Hold the service brakes with the trailer hand valve
- Leave it in gear only
Ver respuesta
Respuesta: A. Apply the spring (parking) brakes
Use the spring brakes to park. Service brakes rely on air, which can leak away.
Pregunta 25 de 25
You fail the air brake knowledge test. When can you try again?
- Right away, the same day
- Only after repeating the whole course
- On a different day
- After 6 months
Ver respuesta
Respuesta: C. On a different day
Retests must be taken on a different day.

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