Truck Driving questions and Answers

Truck Driving questions and Answers For an average commercial vehicle, being driven at 55 mph on dry pavement it will take about ____ to bring the vehicle to a stop. The length of a football field Which of these statements about staying alert to drive is true? The only thing that can cure fatigue is sleep The distance that you should look ahead of your vehicle while driving amounts to about ____ at highway speed. 1/4 mile You are checking your wheels and rims for a pre trip inspection. Which of these statements is true? Rust around wheel 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 haul hazardous materials in a placarded vehicle. You should: Refuse to haul the load The purpose of a baffle is to: Control the load surge You must park on the side of a level, straight, two lane road. Where should you place the three reflective triangles? One within 10 feet of the rear of the vehicle, one about 100 feet to the rear, and one about 100 feet from the front of the vehicle What happens when tar heats up? It makes the road more slippery? To give adequate warning when passing someone, you should? Tap the electrical horn first You are checking your steering and exhaust systems for a pre trip inspection. Which of these statements is true? Steering wheel play of more than 10 degrees (2 inches on a 20-inch steering wheel) can make it hard to steer How often should you check your mirrors? Every 8 to 10 seconds Which of these statements about drinking alcohol is true? All answers are correct All answers are correct 1/3 You are checking your brakes and suspension system for a pre trip inspection. Which of these statements is true? All answers are correct and true You are testing the stopping action of service brakes on a hydraulic system. Which of these can mean there is a problem? Stopping action is delayed Which of these statements about downshifting for a long downhill grade is true? It allows engine compression and friction to help the brakes slow the vehicle Which of these is a good driving rule for work zones? All answers are correct If your vehicle has an alcohol evaporator, every day during cold weather you should: Check and fill the alcohol level. Vehicles with air brakes must have: An air pressure gauge to show the pressure available for braking. If the air compressor should develop a leak, what keeps the air in the tanks? The one way check valve What can legally hold a parking or emergency brake in position for a truck, truck tractor or bus? Spring pressure During normal driving, spring brakes are usually held back by: Air pressure Why drain water from the compressed air tanks? Water can freeze in cold weather and cause brake failure. Parking or emergency brakes of trucks and buses can be legally held on by: Spring pressure Your vehicle has a dual air brake system, if a low air pressure warning comes on for the secondary system, you should. Stop, safely park, and continue only when the system is fixed. When driving down a long steep hill you should: Release the brake when you are 5 M.P.H. below your "safe" The braking power of the spring brakes Depends on the adjustment of the service brakes. Slack adjusters should not have any more than ________ of play? 1 inch Brake drums must not have cracks longer than_____ the width of the fractioned area? 1/2 Air brake equipped vehicles must have: A supply pressure gauge. The modulating control valve is? A spring loaded valve that will let you put on the brakes on slowly if the service brakes fail. The safety release valve will blow at ________ PSI? 150 Modern air brake systems combines three different systems. The are the service brakes, the parking brakes and the: Emergency brakes. The brake system that applies and releases the brakes when the driver uses the brake pedal is the The application pressure gauge shows the driver how much pressure: Is being applied to the brakes. The supply pressure gauge shows the driver how much pressure: Is in the air tanks If you must make an emergency stop, you should brake so that you: Stay in a straight line and can steer. To make an emergency stop with air brakes, using the stab braking method, you should Brake as hard as you can, get off the brakes when the wheels lock, get back on the brakes when the wheels start rolling again. A straight truck or bus air brake system should not leak at a rate of more than ____ PSI per minute with the engine off and the brakes released 2 Lag time at 55 MPH is____ feet? 32 In an emergency stop you should? Use the stab braking method The driver must be able to see a warning that is given before air pressure in the service air tanks falls below: 60 PSI Air braking takes more time than hydraulic braking because air brakes: Need to have airflow through the lines to work. If your vehicle has an alcohol evaporator, it is there to: Reduce the risk of ice in air brake valves in cold weather. The most common type of foundation brakes found on heavy vehicles is the: S- cam brake The brake system that applies and releases the brakes when the driver uses the brake pedal is the Service brake system.