CDL General Knowledge Test
Seeing and hazards: practice questions
Our CDL General Knowledge bank has 11 questions on this topic. Here are 4 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
When following another vehicle at night, how should you use your headlights?
- Turn them off
- Flash them constantly
- Use high beams
- Use low beams
Show the answer
D. Use low beams — High beams can blind the driver ahead through their mirrors.
Question 2
When driving at night, what should you do if oncoming headlights blind you?
- Close your eyes briefly
- Look slightly to the right side of your lane
- Switch to high beams
- Look directly at the lights so your eyes adjust to them
Show the answer
B. Look slightly to the right side of your lane — Use your high beams only when they won't blind others.
Question 3
Which of these drivers is a hazard?
- A driver stopped at a red light
- A driver obeying the speed limit in the right-hand lane
- A driver in a parked car who is about to pull out
- A driver signalling correctly
Show the answer
C. A driver in a parked car who is about to pull out — Look for exhaust smoke, brake lights or people in parked cars.
Question 4
Which driver is a hazard you should watch for?
- A driver keeping a steady speed
- A driver who is signalling well in advance and changing lanes properly
- A driver whose vision is blocked, such as by a delivery truck or parked car
- A parked car with no one in it
Show the answer
C. A driver whose vision is blocked, such as by a delivery truck or parked car — Watch for drivers who may not see you.