Class 4 practice test Flashcards
Different-sized tires can:
Be dangerous if used on the same axle
You may be fined as much as _______ for driving a vehicle whose brakes are out of adjustment.
$2000
How should you upshift a gasoline-powered vehicle that is not equipped with a governor?
- Use only enough throttle to start the vehicle moving
- Shift into higher gears as soon as you have the power to do so
- Engage the clutch smoothly and engage the clutch at the same time
For large commercial vehicles, which of the following are advantages of air brakes as compared with hydraulic brakes?
- Greater force to apply the brakes
- More tolerant of small leaks
What are the consequences if you exceed your maximum on-duty hours and a peace officer stops you?
You can be ordered out of service
While you’re waiting in an intersection to turn left, which way should you point your front wheels?
Straight
If you reduce a tire’s air pressure when it is warm,
You may cause excessive flexing in the tire
A taxi driver must test the brakes on the taxi
Daily
How far back should you stay when following an emergency vehicle with flashing lights and siren on?
150 meters
If a crash occurs while you are backing up with the aid of a guide, who will be held responsible?
You
The minimum following distance for a taxi or ride-hailing (e.g., Uber) vehicle is
2 seconds
When you see a potential hazard in your danger zone, you should
cover the brake pedal
How are flares, fusees, and reflectors used?
As a warning device if a vehicle becomes disabled in the daytime or night
What legal documents are all drivers required to have when operating a vehicle?
Drivers licence, vehicle registration, and proof of insurance
Partway through your trip, you must couple to another trailer. What should you do?
- Obtain trip inspection report for that trailer
- Inspect the trailer yourself if there is no trip inspection report for it
Why are drivers required to complete a trip inspection report?
To comply with government regulations
When braking, just before you come to a stop, you should
Release pressure on the brakes slightly and reapply them
What are the recommended positions for your hands on the steering wheel?
9 o’clock and 3 o’clock
Drivers on Cycle 1 must not drive after completing ____ hours of on-duty time in seven consecutive days.
70
What are some uses of governors?
- To regulate the amount of fuel going to the engine
- To control vehicle speed
- To let you start your vehicle without the throttle
Generally the safest drivers are those who:
Adjust their driving to the conditions
Any defect or deficiency that you find on your bus must be
Reported in writing to the carrier you work for
When driving, the holder of a Class 5–GDL (Probationary) licence must not have a blood alcohol concentration greater than
Zero
If a peace officer asks for your logbook and supporting documents, what documents should you provide?
- Fuel and accommodation receipts
- Shipping documents
- Bills of lading
While you drive, you should check your rear-view mirrors
Every 8-12 seconds
When transporting persons with disabilities, you shouldn’t
Speak to the disabled person’s companion or assistant
A Slow-Moving Vehicle sign should be placed on any vehicle that travels no faster than
40 km/h
If your vehicle lacks antilock brakes (ABS), how can you stop quickly on a wet or icy roadway?
Pump the brakes
Which of the following are true about a humpback railway crossing?
- It is a railway crossing where a hump has formed
- It presents a danger to low-clearance vehicles
Which of the following factors determine the sharpness of your large vehicle’s turn?
- Turning radius
- Off-tracking
If you are parking a single-unit (straight) vehicle on an upgrade without a curb, you should
Turn your wheels towards the edge of the roadway
Reducing a tire’s air pressure when it is hot
Is a bad idea because when the tires cool off, the pressure may be too low
When a tire is underinflated,
- It can be excessively worn on the outer edges of its thread
- It has a greater chance of hydroplaning
Before you enter a curve, what gear should you select?
A gear that lets you drive around the curve while using engine power throughout
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.
100%
What is the best way to ensure that there are no vehicles or cyclists in your blind spot?
Shoulder check
If you’re driving a motor home, you should maintain a following distance of at least ________ behind the vehicle in front of you.
4 seconds
When travelling downhill, what can you do to prevent your brakes from overheating?
Shift into a lower gear
When is it not necessary to do a shoulder check?
When trying to see how close the car is behind you
Underinflated tires and low tire pressures can cause
Faster tire wear
When driving in fog, you should use
Low beam lights
What is the purpose of checking your vehicle’s slack adjusters?
- To ensure your vehicle can stop safely
- To comply with the law
To stop quickly in an emergency, what should you do if your vehicle has antilock brakes (ABS)?
Apply firm, continuous pressure to the brake pedal
You are approached from behind by an emergency vehicle sounding its siren on a one-way street. What should you do?
Pull over to the nearest curb
What is the main purpose of maintaining the correct air pressure in the tires?
To extend the life of the tires
Which of the following may reduce the amount of steering control you have?
- Overinflated tires
- Underinflated tires
- Bald tires
At what speed should you back up your vehicle?
Slow walking speed
If you find a defect or deficiency in your passenger vehicle, what should you do?
Report it in writing to the company you work for, by the end of the day
Which of the following statements about revolutions per minute (rpm) are true?
- Displayed on the tachometer
- It is the number of turns the crankshaft makes per minute
- It helps you decide when to shift
Rapid acceleration can increase your fuel consumption by up to
40%
Why should you use extra caution at railway crossings in rural areas?
- There are fewer automatic warning systems
- Brush is more prevelant
While you’re driving a school bus, it breaks down on the road. What should you do?
- Place a warning triangle in front and behind the bus
- Park the bus away from the roadway
When parking a vehicle with a manual transmission facing uphill, you should always leave the parking brake on and the transmission in:
First gear
You are entering a street from a driveway. Which of these is the correct procedure to follow?
Stop at the edge of the sidewalk and the edge of the road again
When you are following a motorcycle, allow extra space between your vehicle and the motorcycle because
Motorcycles can stop very quickly
Which of the following are advantages of a dual air brake system?
If one system fails, you’ll still be able to stop
What should you do to prevent a vehicle fire?
- Make sure your vehicle’s brakes are fully released while driving
- Maintain proper tire pressures
- Never start a vehicle with a fuel leak
If you’re approaching a level railway crossing that is not protected by gates or railway crossing signals, what should you do?
Stop at least 5 meters from the nearest rail and open the door
What does the term “space cushion” mean?
Space between your vehicle and vehicles around you
If you are parking your vehicle on an upgrade without a curb, you should
Turn your wheels toward the edge of the roadway
How often should you look at your mirrors?
Every 5-8 seconds
What is the best way to check for vehicles in your blind spot?
Shoulder check
In the context of commercial driving, what is a turnout?
A place to turn off the road to let other vehicles pass
How can you tell how much air pressure is in the service reservoirs?
Check the reservoir pressure gauge on the dashboard
You should not follow cyclists closely because
They lack brake lights
A white X pavement marking in your lane means that
You are approaching a railway crossing
What makes the roads extra slippery at the start of a rainfall?
The water mixes with the oil on the pavement
What is an advantage of automatic slack adjusters?
They help maintain correct pushrod stroke
If you’re on a 14-day cycle, what is the maximum number of hours you can drive within 14 consecutive days?
120 hours
How can you downgrade from a commercial licence to a non-commercial licence?
Apply for the downgrade at your drivers licencing office
Where are a large commercial vehicle’s blind spots?
To the front, behind, and both sides
An oncoming vehicle at night has not dimmed its high-beam headlights. What should you do?
Look at the right edge of your lane until the vehicle passes
The time you spend riding on a ferry is considered off-duty time unless
You are a bus driver selling tickets while on the ferry
Which dashboard gauge can help you decide when to upshift?
The tachometer
You are sharing a vehicle with another driver during a trip. The two of you disagree about which defects should be reported. What should you do?
Make a note of the disagreement
To reduce whiplash injuries, the space between your head and the head restraint should be
Less than 10 cm (4 in.)
What is the purpose of an antilock braking system (ABS)?
To help prevent wheel lockup
Besides regular brake maintenance, who is responsible for ensuring that the brakes of a vehicle are working properly before the vehicle is driven?
The driver
Before you make a left turn in a large school bus, you should do which of the following?
Wait for gaps in traffic on both sides
Turning right from one two-way road into another, from where should you begin your turn?
Close to the right hand curb or edge
When driving in heavy fog, you should use
Low beam lights
You should exercise extreme caution when the asphalt looks
Shiny and black
A tractor-trailer travelling at high speeds creates air turbulence in which of the following areas?
- At the immediate rear
- Alongside the cab
- Directly in front
Your vehicle’s engine will start to lug (strain) if it is operated
Below peak torque
Compounding the air brakes can
- Damage the brake chambers
- Damage the slack adjusters
- Damage the foundation brakes
Where would an air dryer be installed in an air brake system?
Between the compressor and first reservoir
On a long, narrow stretch of highway, a bus has just reached a passing lane. The bus is travelling slower than the rest of the traffic. What should the bus driver do?
Move into the right lane to let cars pass on. the left
If a bus becomes disabled on a roadway at night, flares or reflectors must be placed approximately _________ in front of and behind the vehicle.
30 meters (100ft)
When should you check the tire pressures?
When tires are cool
What is a runaway lane?
A lane designed to stop a vehicle who’s brakes have failed
Double-clutching is
A way to match engine shaft speed to the speed of the gear
When adjusting a manual slack adjuster, how can you tell whether you are turning the adjusting bolt in the correct direction?
The cam will rotate in the same direction as if the brakes were being applied
