NC CDL General Knowledge Questions and Answers with Verified Solutions

NC CDL General Knowledge Questions and Answers with Verified Solutions To prevent a load from shifting, there should be at least one tiedown for every __ feet of cargo. 10 You are driving a 40-foot vehicle at 35mph. 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? 4 seconds. Which of these statements about drinking alcohol is true? 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: Stop safely and fix the problem. Which of these statements about driving in areas with strong winds is true? Winds are a big problem when a truck comes out of tunnels. What is counter-steering? Turning the wheel back in the other direction after steering to avoid a traffic emergency. To help you stay alert while driving you should: 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: The vehicle does not require placards. Cargo inspections: 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: 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? A lower gear than you would use to climb the hill. Which of these statements about speed management is true? 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? Snubbing. Which of these statements about double clutching and shifting is true? You can use the tachometer to tell you when to shift. Which of these statements about using turn signals is true? When turning, you should signal early. Which of these statements about cargo loading is true? State laws dictate legal weight limits. If your vehicle catches fire while you are driving, you should: Park in an open area. You are checking your tires for a pre-trip inspection. Which of these statements is true? 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? It may be a slow-moving vehicle. An en route inspection should include checking for: Tire overheating and brake overheating. Cargo secured properly. You're 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 best action to take? Steer to the right. Where or when should you test the stopping action of your service brakes? When the vehicle is moving at about 5 mph. Which of these is not part of the pre-trip inspection of the engine compartment? Valve clearance. Cargo covers: Protect people from spilled cargo. May be a safety requirement in some States. High beams should be: Used when it is safe and legal to do so. Which of these is the most important thing to remember about emergency braking? 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? 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? Stop driving as soon as you can safely do so. Which of these statements about tires and hot-weather driving is true? You should inspect your tires every two hours or every 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? You can almost always turn to miss an obstacle more quickly than you can stop. What should you do when your vehicle hydroplanes? Release the accelerator. You are starting your vehicle from a stop. As you apply power to the driver wheels, they start to spin. You should: Take your foot off the accelerator. Stab Braking: 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. 4 Cargo that can shift should have at least __ tie-downs(s). 2 If a straight vehicle (no trailer or articulation) goes into a front-wheel skid, it will: Go straight ahead even if the steering wheel is turned. Which of these statements about accelerating is true? Rough acceleration can cause mechanical damage. Which of these is a good thing to remember when crossing or entering traffic with a heavy vehicle? Heavy vehicles need larger gaps in traffic than cars. Which of these statements about staying alert to drive is true? Sleep is the only thing that can overcome fatigue. You are driving on a two-lane road. An oncoming driver drifts into your lane and is headed straight for you. Which of these is most often the best action to take? Steer to the right. Which of these statements about engine overheating is true? You should never remove the radiator cap on a pressurized system until the system has cooled. You are driving a truck with a manual transmission. You have to stop the truck on the shoulder while driving on an uphill grade. Which of these is a good rule to follow when putting it back in motion up the grade? Use the parking brake to hold the vehicle until the clutch engages. A vehicle is loaded with most of the weight on the steering axle. What may result? Hard steering and possible damage to the tires. You are driving a 40-foot vehicle at 50 mph. Driving conditions are ideal (dry pavement, good visibility). What is the least amount of space that you should keep in front of your vehicle to be safe? 5 seconds. Which of these is a good thing to do when steering to avoid a crash? Do not turn any more than needed to clear what is in your way. You are checking your wheels and rims for a pre-trip inspection. Which of these statements is true? Rust around lug nuts may mean that they are loose. You do not have a Hazardous Materials Endorsement on your Commercial Driver's License. You are asked to deliver hazardous material in a placarded vehicle. You should: Refuse to haul the load. As the Blood Alcohol Concentration (BAC} goes up, what happens? Judgment and self-control are affected. If you need to leave the road in a traffic emergency, you should: Avoid braking until your speed has dropped to about 20mph. Which of these statements about downshifting for a long downhill grade is true? It allows engine compression and friction to help slow the vehicle. When looking ahead of your vehicle while driving you should look: Back and forth, near and far. Escape ramps are: Used to stop runaway vehicles. Which of these statements about cold-weather driving is true? Windshield washer antifreeze should be used. When should you wear seat belts? Anytime you are in a moving vehicle. Controlled braking: Is used to keep a vehicle in a straight line when braking. How do you correct a rear-wheel acceleration skid? Stop accelerating. Which of these is NOT a good rule to follow when caring for injured at an accident scene? Keep injured persons cool. For your safety, when setting out reflective triangles you should: Hold the triangles between yourself and oncoming traffic. Heavy vehicles must sometimes travel more slowly than other traffic. Which of these is NOT a good rule to follow when you are driving such a vehicle? Signal other drivers when it is safe for them to pass you. The most important reason for being alert to hazards is so: You will have time to plan your escape if the hazard becomes an emergency. Hydroplaning: Is more likely if tire pressure is low. If you are being tailgated, you should: Increase your following distance. Which of these statements about overhead clearance is true? The weight of a vehicle changes its height. Which of these is a good rule to follow when using a fire extinguisher? Aim at the base of the fire. While driving, you see a small (1-foot square) cardboard box ahead in your lane. You should: Steer around it without making a sudden or unsafe move. Is it legal to drive with one fourth of a vehicle's leaf springs broken or missing? No. Which of these can cause a fire? Loose fuel connections. Under-inflated tires. Electrical short circuits. Dry Bulk tanks and hanging meat: Are unstable loads. Which of the following should you NOT do in the event of hydraulic brake failure? Shift up. To correct a drive-wheel braking skid you should: Counter-steer. Which of the following statements about tank vehicles is true? Special skills are required to haul liquid tanks. If you are driving a long distance, you should: Stop often and take short breaks before you feel really drowsy or tired. Which of the following is true about a vehicle with a high center of gravity? The cargo should be rearranged so that the heaviest parts of the cargo are under the lightest parts. To prevent skidding, you should: Adjust to conditions while driving. You should back and turn toward the driver's side: So you can watch the rear of the vehicle by looking out the side window. When you check the condition of visible parts during your pre-trip inspection, make sure that the __are secured against snagging, rubbing or wearing. Airlines and electrical wiring. With BAC (Blood Alcohol Concentration) of__, most people lose consciousness, and some die. .40 The distance your vehicle travels from the time your eyes see a hazard until your brain recognizes it is called ___ distance. Perception. Which of these items is checked in a pre-trip inspection? Whether all vehicle lights are working and clean. Cargo securement. Wiper blades. The 'reaction distance" is the distance traveled from the time: The brain tells the foot to push the brake pedal to the time the foot actually pushes the pedal. When driving a commercial vehicle with a height over 13 feet, you should: If you aren't sure a clearance is high enough stop and make sure. The purpose of a baffle is to: Control the load surge. The new BAC (Blood Alcohol Concentration) for commercial drivers to be considered intoxicated when driving a commercial vehicle is: .04 Truck escape ramps: Are designed to protect vehicles from damage. Which of these can cause the vehicle to skid? Not enough weight on the front axle. Over acceleration. Turning too sharply. Which of these describes how you should use the brake pedal on a steep downhill grade? Release the brake when you are 5 MPH below your safe speed, then let your speed come back up to your safe speed and repeat braking again (bring your speed down 5 MPH below your safe speed). An en-route inspection should include checking: Cargo doors and/or cargo securement. Tire temperature. Brake temperature. According to the driver's manual, why should you limit the use of your horn? It can startle other drivers. The amount of liquid to load into a tank depends on: The weight of the liquid. The legal weight limits. The amount of liquid will expand in transit. You should use your mirrors to check: Traffic gaps before you merge. The condition of the tires and cargo. Where the rear of your vehicle is while you make turns. Your brakes can get wet when you drive through a heavy rain. What can this cause when the brakes are applied? Lack of braking power. Trailer jackknife. Wheel lockup. Which of these statements about using mirrors is true? There are blind spots that your mirrors cannot show you. To avoid a crash, you had to drive onto the right shoulder. You are now driving at 40 MPH on the shoulder. How should you move back onto the pavement? Come to a complete stop, if possible, before steering back onto the pavement. Which of these statements about managing space is true? When the road is slippery, you should keep much more space in front of your vehicle. You are testing the stopping action of service brakes on a hydraulic system. Which of these can mean there is a problem? The brake pedal goes to the floor. Stopping action is delayed. The vehicle pulls to one side when the brake pedal is pressed. The distance that you should look ahead of your vehicle while driving amounts to about __ at highway speed. ¼ mile (one-fourth). Which of these statements about drinking alcohol is true. Alcohol first affects judgment and self-control, which are essential for safe driving. Statistics show that drivers who have been drinking have a much greater chance of being in a crash. A driver can lose their license for driving while under the influence of alcohol. On which fires can you use the "ABC" fire extinguisher? Electrical fires. Burning tires. Burning cloth. Which of these is a proper use of vehicle lights and flashers? Flashing your brake lights to warn someone behind you of a hazard that will require slowing down. Turning on your headlights during the day when visibility is reduced due to rain or snow. Flashing your brake lights to warn someone behind you that you're are going to stop on the road. Which of these tell you that cargo contains hazardous materials? A four-inch, diamond shaped hazardous materials label on the container. A hazardous materials placard on the vehicle. If you are convicted for driving under the influence while driving a commercial vehicle, and this is your first offense, you will most likely get: At least a one-year suspension of your CDL. Some liquid tanks are divided into several smaller tanks by: Bulkheads. Front-end header boards: Block the forward movement of your cargo. Protect you from your cargo in case of collision. The height of the vehicle center of gravity is very important for safe handling. A high center of gravity means you are more likely to do the following: Rollover. The "load" means the following? The maximum safe weight a tire can carry at a specified pressure.