CDL General Knowledge Exam Questions with 100% Correct Answers

To prevent a load from shifting, there should be at least one tie down for every _______ feet of cargo. Correct Answer 10 You are driving a 40-foot vehicle at 35 mph. The road is dry, and visibility is good . What is the least amount of space you should keep in front of your vehicle to be safe? Correct Answer 4 seconds Which of these statements about drinking alcohol is true? Correct Answer A few beers have the same effect on driving as a few shots of whiskey or a few glasses of wine. While driving, ice builds up on your wipers and they no longer clean the windshield. You should: Correct Answer Stop safely and fix the problem. Which of these statements about driving in areas with strong winds is true? Correct Answer Winds are a big problem when a truck comes out of tunnels. What is counter-steering? Correct Answer Turning the wheel back in the other direction after steering to avoid a traffic emergency. To help you stay alert while driving, you should: Correct Answer Take short breaks before you get drowsy. You do not have a Hazardous Materials Endorsement on your Commercial Driver's License. You can drive a vehicle hauling hazardous materials when: Correct Answer The vehicle does not require placards. Cargo inspections: Correct Answer Should be performed as part of your pre-trip inspection, again within the first 50 miles of your trip, then again after you have driven 3 hours or 150 miles, and after every break you take during driving. Retarders: Correct Answer Can cause the drive wheels to skid when they have poor traction. You are driving a new truck with a manual transmission. What gear will you probably have to use to take a long, steep downhill grade? Correct Answer A lower gear than you would use to climb the hill. Which of these statements about speed management is true? Correct Answer You should choose a speed that lets you stop within the distance that you can see ahead. Which of these best describes how you should use the brake pedal on a steep downhill grade? Correct Answer Snubbing Which of these statements about double clutching and shifting is true? Correct Answer You can use the tachometer to tell you when to shift. Which if these statements about using turn signals is true? Correct Answer When turning, you should signal early. Which of these statements about cargo loading is true? Correct Answer State laws dictate legal weight limits. If your vehicle catches fire while you are driving, you should: Correct Answer Park in an open area. You are checking your tires for a pre-trip inspection. Which of these statements is true? Correct Answer Tires of mismatched sizes should not be used on the same vehicle. You can see a marking on a vehicle ahead of you. The marking is a red triangle with an orange center. What does the marking mean? Correct Answer It may be a slow-moving vehicle. An en route inspection should include checking for: Correct Answer (Both are correct) Tire overheating and brake overheating; Cargo secured properly. You are driving in the right lane of a four-lane, undivided road. You come over a hill and find a car stopped ahead in your lane. You do not have room to stop. The hill blocks your view to the rear. The shoulder is clear. Which of these is most likely the nest action to take? Correct Answer Steer to the right. Where or when should you test the stopping action of your service brakes? Correct Answer When the vehicle is moving about 5 mph. Which of these is not part of the pre-trip inspection of the engine compartment? Correct Answer Valve clearance Cargo covers: Correct Answer (both are correct) Protect people from spilled cargo; May be a safety requirement in some states. High beams should be: Correct Answer Used when it is safe to do so. Which of these is the most important thing to remember about emergency braking? Correct Answer If the wheels are skidding, you cannot control the vehicle. You must park on the side of a level, straight, two-lane road. Where should you place the reflective triangles? Correct Answer One within 10 feet of the rear of the vehicle, one about 100 feet to the rear, and one about 100 feet to the front of the vehicle. The road you are driving on becomes very slippery due to glare ice. Which of these is a good thing to do in such a situation? Correct Answer Stop driving as soon as you can safely do so.