CDL General Knowledge | Study Guide ( Updated 2024 ) Complete Questions & Answers (Solved) 100% Correct
- To prevent a load from shifting, there should be at least one tie down for every feet of
cargo.
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?
Answer: 4 seconds
- Which of these statements about drinking alcohol is true?
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:
Answer: Stop safely and fix the problem.
- Which of these statements about driving in areas with strong winds is true?
Answer: Winds are a big problem when a truck comes out of tunnels.
- What is counter-steering?
Answer: Turning the wheel back in the other direction after steering to avoid a traffic emergency.
7. To help you stay alert while driving, you should:
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:-
Answer: The vehicle does not require placards.
9. Cargo inspections:
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.
10. Retarders:
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?Answer: A lower gear than you would use to climb the hill. 1 / 3
- Which of these statements about speed management is true?
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?
Answer: Snubbing
- Which of these statements about double clutching and shifting is true?
Answer: -You can use the tachometer to tell you when to shift.
- Which if these statements about using turn signals is true?
Answer: When turning, you should signal early.
- Which of these statements about cargo loading is true?
Answer: State laws dictate legal weight limits.
17. If your vehicle catches fire while you are driving, you should:
Answer: Park in an open area.
- You are checking your tires for a pre-trip inspection. Which of these statements is true?
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?
Answer: It may be a slow-moving vehicle.
20. An en route inspection should include checking for:
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?
Answer: Steer to the right.
- Where or when should you test the stopping action of your service brakes?
Answer: When the vehicle is moving about 5 mph.
- Which of these is not part of the pre-trip inspection of the engine compartment?
Answer: Valve clearance
24. Cargo covers:
Answer: (both are correct) Protect people from spilled cargo; May be a safety requirement in some states. 2 / 3
25. High beams should be:
Answer: Used when it is safe to do so.
- Which of these is the most important thing to remember about emergency braking?
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?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?
Answer: Stop driving as soon as you can safely do so.
- Which of these statements about tires and hot-weather driving is true?
Answer: - You should inspect your tires every two hours or very 100 miles when driving in very hot weather.
- Your truck is in a traffic emergency and may collide with another vehicle if you do not take
action. Which of these is a good rule to remember at such a time?Answer: You can almost always turn to miss an obstacle more quickly than you can stop.
- What should you do when your vehicle hydroplanes?
Answer: Release the accelerator.
- You are starting your vehicle from astop. As you apply power to the driver wheels, they
start to spin. You should:
Answer: Take your foot off the accelerator.
33. Stab braking:
Answer: Involves releasing the brakes only after the wheels lock up.
- It takes the body about hours to get rid of the alcohol in four drinks.
Answer: 4
- Cargo that can shift should have at least tie-downs.
Answer: 2
- If a straight vehicle (no trailer or articulation) goes into a front-wheel skid, it will:
Answer: Go straight ahead even if the steering wheel is turned.
- Which of these statements about accelerating is true?
- / 3
Answer: Rough acceleration can cause mechanical damage.