General Knowledge CDL Practice Questions
236 free General Knowledge CDL-style practice questions.
The driver's manual suggests several things to do when you pass a vehicle. Which of these is NOT one of…Which of these statements about engine overheating is true?You must park on a side of a level, straight, four-lane divided highway. Where should you place the reflective triangles?The road you are driving on becomes very slippery due to black ice. Which of these is a good thing…To determine blood alcohol concentration level for a person, it is necessary to know:If your vehicle catches fire while you are driving, you should:Most skids:You are driving in an area with few streetlights. If you cannot see well with your headlights, which of the…Retarders:Which of these is NOT a danger when an automatic transmission is forced into a low gear at a high…Hydroplaning:To help you stay alert while driving, you should:Which of these statements about using turn signals is true?Most serious skids result from:What is countersterring?Why is it important to shift gears correctly?When you are starting to move up a hill from a stop:If you need to leave the road in a traffic emergency, you should:When you are passing a vehicle, pedestrian, or bicycle, you should assume that:Which of these statements about acceleration is true?You are driving a 40-foot vehicle at 55 mph. The road is dry, and visibility is good. What is the…Which of these lights cannot be checked at the same time?In bad weather, many drivers tailgate large vehicles. What should you do?Which of these is not required knowledge for drivers seeking a hazardous material endorsement?How far should a driver look ahead of the vehicle while driving?What should you do if a car coming toward you at night keeps its high beams on?A car suddenly cuts in front of you, creating a hazard. Which of these actions should you NOT take?Should brake adjustment be checked often?Which of these is NOT a good rule to follow when caring for injured persons at an accident scene?Backing of the commercial vehicle is:Which of these is NOT a danger of a rough acceleration?Which of the following vehicles will have the longest stopping distance?When is it necessary to learn how a fire extinguisher works?Which of these is NOT something you should do if your headlights are not working properly?A key principle to remember about loading cargo is to keep the load:Which of these statements about backing a heavy vehicle is true?When starting a bus on a level surface with good traction, there is often no need for:When should you test your parking brakes?You do not have a hazardous materials endorsement on your commercial driver's license. You are asked to deliver hazardous materials…Which of these statements about staying alert to drive is true?Sometimes you need to leave a road to avoid a hazard or emergency. When you do, you should keep in…Which of these is not a brake check you normally do during your walk-around inspection?In mountain driving, you will have to use a lower gear to drive safely on a grade. Which of these…You should wear a seat belt in a moving vehicle:The purpose of the retarders is to:Which of these statements about overhead clearance is true?Which of these statements about driving in areas with strong wind is true?Escape ramps:Which of these best describes how to use the brake pedal on a steep downhill grade?You should use your horn when: