CDL general knowledge practice test 9

A: Protect the area, notify authorities, and care for the injured. The basic steps at any crash are to protect the area, notify authorities and care for the injured. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.20 Crash procedures, page 91.

B: Within 500 feet of an oncoming vehicle and when following another vehicle within 500 feet. Switch to low beams when an oncoming vehicle is within 500 feet, and also when you are within 500 feet behind another vehicle. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.11.5 Night driving procedures, page 74.

D: It is a crime; you will be cited and not allowed to drive the truck. Driving a vehicle that needs placards without the HazMat endorsement is a crime; you'll be cited and won't be allowed to drive the truck. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.23.3 Lists of regulated products, page 97.

B: It can damage the coupling. Rough acceleration can cause mechanical damage, and when pulling a trailer it can damage the coupling. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.2.1 Accelerating, page 43.

D: Away from the crash, leaving room for emergency vehicles. Park away from the crash; the area right around it will be needed for emergency vehicles. Turn on your flashers and set out triangles. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.20.1 Protect the area, page 91.

A: Look slightly to the right and keep your low beams on. Don't retaliate with your high beams, which increases glare and crash risk; look toward the right lane or edge marking. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.11.5 Night driving procedures, page 75.

A: Take your foot off the accelerator. On slippery roads, accelerate very gently. If the drive wheels start spinning, ease off the accelerator. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.2.1 Accelerating, page 43.

C: Only if the danger of fire or passing traffic makes it necessary. Don't move a severely injured person unless fire or passing traffic makes it necessary. Stop heavy bleeding with direct pressure and keep the person warm. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.20.3 Care for the injured, page 92.

D: A bright cab makes it harder to see outside. A bright cab makes it harder to see outside, so keep the interior light off and dim the instrument lights as low as you can while still reading the gauges. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.11.5 Night driving procedures, page 75.

D: Firmly with both hands on opposite sides of the wheel. Hold the wheel firmly with both hands on opposite sides; hitting a curb or pothole could otherwise pull it from your hands. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.2.2 Steering, page 43.

B: Under-inflated tires and duals that touch. Under-inflated tires and dual tires that touch can cause tire fires. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.21.1 Causes of fire, page 92.

C: Don't; pull off into a rest area or truck stop until visibility improves. The best advice for fog is don't drive; pull off until visibility is better. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.12 Driving in fog, page 75.

C: When the engine is close to idle. Push the brake pedal down gradually, and push the clutch in when the engine is close to idle. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.2.3 Stopping, page 43.

A: Stay with the vehicle and watch the nozzle. Spills while fueling can start fires, so stay with the vehicle and keep watching the nozzle. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.21.2 Fire prevention, page 92.

B: Low-beam headlights and fog lights, even in daytime. Use low beams and fog lights for the best visibility even in daytime, and turn on your four-way flashers. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.12 Driving in fog, page 75.

B: Backing is always dangerous because you can't see everything behind you. You can't see everything behind you, so backing is always dangerous. Avoid it whenever you can. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.2.4 Backing safely, page 43.

D: In an open area away from buildings, trees, brush and other vehicles. Get the vehicle off the road in an open area away from buildings, trees and other vehicles, never into a service station, and call emergency services. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.21.3 Fire fighting, page 92.

A: The vehicle may not be on the road at all. Taillights or headlights ahead may not show where the road is, because the vehicle may be off the road. Use roadside reflectors as guides. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.12 Driving in fog, page 75.

A: Four-way hazard lights. Activate the four-way hazard lights before backing, and back as slowly as possible in the lowest reverse gear. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.2.4 Backing safely, page 43.

C: Turn off the engine and avoid opening the hood; aim the extinguisher through the louvers, radiator or from underneath. Shut the engine off quickly and keep the hood closed if you can. Spray the extinguisher in through the louvers or radiator, or from under the vehicle. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.21.3 Fire fighting, page 92.

D: Avoid passing other vehicles and don't stop along the roadside unless absolutely necessary. If you must drive in fog, slow down before you enter it, don't pass, listen for traffic you can't see and stop on the roadside only if you have to. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.12 Driving in fog, page 75.

D: Toward the driver's side. Back toward the driver's side so you can watch the rear of the vehicle out the side window; backing to the right is very dangerous because you can't see as well. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.2.4 Backing safely, page 44.

B: Keep them shut, especially if the cargo is hazardous materials. Keep the doors shut; opening them supplies oxygen and can make the fire burn very fast. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.21.3 Fire fighting, page 93.

C: The engine may overheat and stop. Ice-bound radiator shutters or a winterfront closed too far can make the engine overheat and quit. Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.13.1 Vehicle checks, page 76.

C: Stop. Work out hand signals you both understand before backing, and be sure to agree on a signal for "stop." Wisconsin Commercial Driver's Manual (BDS356), based on the AAMVA 2025 CDL Manual: 2.2.4 Backing safely, page 44.