CDL general knowledge - day 1

you are driving a new truck with manual transmission. What gear would you probably need to use to take a long,steep downhill grade?. The same gear you would use to climb the hill. A lower gear than you would use to climb the hill. A higher gear than you would use to climb the hill.

you are checking your wheels and rims for a pre-trip inspection. Wich statement is true?. Rust around the wheels nuts may indicate that they are loose. A vehicle can be safely driven with one missing lug nut on a wheel. Mismatched lock rings can be used on the same vehicle.

You are checking your tires for a pre-trip inspection. Wich statement is true?. Tires of mismatched sizes should not be used together on the same vehicle. Radial and bias-ply tires can be used together on the same vehicle. 2/32 inch tread depth is safe for front tires.

If a straight vehicle, (not trailer or articulation), goes into a front-wheel skid it will: Slide sideways and spin out. Go straight ahead when the steering wheel is turned. Go straight ahead but will turn if you turn the steering wheel.

you do not have a hazardous materials endorsement on your commercial driver's license. You are asked to deliver hazardous materials in a placarded vehicle. You should: Refuse to haul the load. Haul the load but only to the nearest place where a driver with a hazardous material endorsement can take over. Haul the load but file a report with the department of transportation after trip.

which of these statements about staying alert to drive is true?. A half-hour break for cofee will do more to keep your alert than a half-hour nap. If you must stop to take a nap, it should be at a truck stop or other rest area and never on the side of the road. Sleep is the only thing that can overcome fatigue.

You are driving on pavement at 55 mph. About how much total stopping distance will you need to bring your vehicle to a stop?. twice the length of the vehicle. half the length of a football field. the length of a football field.

Which of these statements about cold weather driving is true?. an engine cannot overheat when the weather is very cold. windshield washer antifreeze should be used. exhaust system leaks are less dangerous is cold weather.

when drivig at night, you should: look to the left side of the road when a vehicle is coming towards you. adjust your speed to keep your stopping distance within your sight range. dim your lights within 300 feet of oncoming vehicles.

which of these statements about downshifting is true?. when you downshifting for a curve, you should do so before you enter the curve. when you downshifting for a hill, you should do so after you start down the hill. when duble-clutching, you should let the ramps decrease while the clutch is released and the shift level is neutral.

for your safety, when setting out reflective triangles you should: hold the triangles between yourself and oncoming traffic. keep them out of sight while you walk to the spots where you are going to set them. turn on your flashers.

which of these is a good thing to remenber about using mirrors. you should triangles between yourself and oncoming traffic. convex mirrors make things look larger and closer than they really are. there are blind spots that your mirrors cannot show.

hydroplanning : only occurs when there is a lot of water on the road. cannot occur when driving through a puddle. is more likely to occur if tire pressure is low.

if you are being tailgated, you should: increase your following distance. flash your brake lights. signal the tailgater when it is safe to pass you.

how far should a driver look ahead of the vehicle while driving?. 5-8 seconds. 12-15 seconds. 18-21 seconds.

the purpose of retarders is to: help slow the vehicle while driving and reduce brake wear. apply extra braking power to non-drive axles. help prevent skids.

you should avoid driving through deep puddles or flowing water. But if you must, which of these steps can help to keep your brakes working?. gently putting on the brakes while driving through the water. applying hard pressure to both the brakes and the accelerator after coming out of the water. turning on your brake heater.

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 do. the best way to cross traffic is to pull your vehicle partway across the road and block on lane while waiting for the other cars to clear. because heavy vehicles are easy to see, you can count on other deivers to move out of your way or slow down for you.

you are driving a heavy vehicle with a manual transmission. you have to stop the vehicle on the shoulder while driving on an uphill grade. which of these is a good rule to follow when putting your vehicle back in motion up grade?. keep the clutch slipping while slowly accelerating. use the parking brake to hold the vehicle until the clutch engages. let the vehicle rolls backwards a few feet before you engage the clutch, but turn the wheel so that the back moves away from the roadway.

you are driving a heavy vehicle. you must exit a highway using and off-ramp that curves downhill. you should: slow down to a safe speed before the curve. slow to the posted speed limit for the off-ramp. wait until you are in the curve before downshifting.

you must park on the side of a level, straight, four-lane, divided highway. Where shouldyou place the reflective triangles?. one within 10 feet of the rear of the vehicle, one about 100 feet of the rear and one about 200 feet of the rear. one within 10 feet of the rear of the vehicle, one about 100 feet of the rear and one about 100 feet of the rear. one within 10 feet of the rear of the vehicle, one about 100 feet of the rear and one about 200 feet of the rear of the vehicle.

brake fade: can be caused by the brakes getting very hot. can be corrected by letting up on the brakes for 1-2 seconds and then reapplying them. is a problem that only occurs with brake drums.

which of these statements about engine overheating is true?. you should never shut off an overheated engine until it cools. you should never remove a radiator cap from a pressurizedsystem until the system has cooled. antifreeze is not needed when the wheater is warm.

which of these statements about overhead clearance is true?. you should assume that posted clearance signs are correct. the weight of a vehicle changes its height. if the road surface causes your vehicle to tilt toward objects at the edge of the road, you should drive close to the shoulder.

you are driving a long vehicle that makes wide turns. You want to make aleft from Elm street onto polar street. Both are two -lane, two way street. You should: begin turning your vehicle as soon as you enter the intersection. begin turning your vehicle when you are halfway through the intersection. turn into the left lane of poplar street, then move to the right lane when the traffic is clear.

you must drive on a slippery road. which of the following options would be the best to take in this situation?. use a smaller following distance. apply the brakes while on curves. slow down gradually.

which of these statements about acceleration is true?. when traccion is poor, more power should be applied to the accelerator. rough acceleration can cause mechanical damage. you should feel a jerkin motion if you have accelerated your vehicle properly.

which of these statements about brakes is true?. the heavier a vehicle or the faster it is traveling, the more heat the brakes have to stop it. brakes have more stopping power when they get very hot. brake drums cool very quickly when the vehicle is moving very fast.

when the roads are slippery, you should: make turns as gently as possible. stop and test traction while going uphill. decrease the distance that you look ahead of your vehicle.

you are checking your brakes and suspension system for a pre-trip inspection. which of these statements is NOT true?. brake shoes should have fluid on them. one missing leaf in a leaf spring can be dangerous. a cracked drum should be replaced.

the driver's manual suggest several things to do when you pass a vehicle. which of these is NOT one of them?. lightly tap your horn. at night, turn on your high beams before you start to pass and leave them on until you have completely passed the vehicle. assume that the other driver does not see you.

the distance that you should look ahead of your vehicle while driving amounts to about ________ miles at normal highway speed. 1/8. 1/4. 1/2.

which of these statements is the most important thing to remember about emergency braking?. Disconnecting the steering axle brake will keep your vehicle in a straight line during emergency braking. If the weels are skidding, you cannot control your vehicle. Never do it within downshifting first.

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. the air pressure of a tire decreases as the temperature outside the tire increases. if tires are too hot to touch, letting five to ten pounds of air pressure out them will cool them down.

which of the following statements about driving in areas with strong wind is true?. you should drive along side other vehicles to help break up the wind. the lighter your vehicle, the less trouble you will have with the wind. winds are especially a problem when exiting tunnels.

which of the following statements would be a good thing to do when driving at night?. keep your speed slow enough that you can stop within the range of your headlights. look directly at oncoming headlights only briefly. keep instrument light bright.

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 a safe?. 3 seconds. 4 seconds. 5 seconds.

what is the proper way to hold the steering wheel?. with both hands close together, near the top of the steering wheel. with both hands close together, near the bottom of the steering weel. with both hands on opposite sides on the steering wheel.

High beams should be: used when it is safe and legal to do so. turned on when an oncoming driver does not dim his/her lights. dimmed when you get within 100 feet of another 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. the vehicle is hauling hazardous materials. it is being driven by a student driver.

which of these is NOT part of the pre-trip inspection of the engine compartment?. valve clearance. engine oil level. worn electrical wiring insulation.

The road you are driving on becomes very slippery due to glare ice. Which of the following statements is a good thing to do under such circumstances?. stop driving as soon as you can safely do so. downshift to stop. keep varying your speed by accelerating and braking.

You wish to turn right from one two-way street to another. Your vehicle is so long that you must swing wide to make the turn. Which of these figures shows how the turn should be made?. figure A. figure B. figure C.

you are driving a vehicle that could safely be driving at 55 mph on an open road. But traffic is heavy and other vehicles are driving at a speed of 35 mph, even though the speed limit is 55 mph. The safe speed for your vehicle is more likely to be: 35 mph. 45 mph. 55 mph.

which of these statements about backing a heavy vehicle is true?. you should avoid backing whenever possible. helpers should be out of the driver's sight and use only voice, (spoken), signals to communicate with the driver. it is safer to back towards the right side of the vehicle than towards the driver's side.

which of these statements about marking a stopped vehicle is true?. if a hill or curve keeps drivers behind you from seeing your stopped vehicle within 500 feet, the last rear reflective triangle should be moved down the road to give adequate warning. you do not need to put out reflective triangles unless your vehicle will be stopped for 30 minutes or more. the vehicles tail lights should be kept on to warn other drivers.

which of these best describes how you should use the brake pedal on a step downhill grade?. light, pumping action. light, steady pressure. repeated strong pressure, then release.

which of these statements about turn signals is true?. you do not need to use your turn signal early. when turning, you should signal early. you should use your turn signal to mark your vehicle when it is pulled off on the side of the road.

retarders: can cause the drive wheels to skid when they have poor traction. cause extra brake wear. work when you apply the break pedal.

when exiting or entering on a curved freeway ramp, you should?. maintain a speed 5-10 mph under the posted speed limit. maintain the posted speed limit. slow down to at least 50% of the posted speed limit.

which of the following vehicles will have the longer stopping distance?. empty truck. loaded truck. bobtail.

how many red reflective triangles are you required to carry?. 2. 3. 4.

you are required to inspect your truck within how many miles after beginning the trip?. 100. 125. 25.

the new BAC (Blood Alcohol Concentration), for commercial drivers to be considered intoxicated when driving a commercial vehicle is?. 0.04. 0.01. 0.10.

communication means: talking with law enforcement officers. to communicate your intentions to other motorist. to talk on the CB radio.

if you are convicted for driving under the influence while driving a commercial vehicle and this is your first offense, you most likely will receive: A probation period of one year. A minimum of one year suspension of your CDL. A fine of $250.00.

if you are stopped at a roadside rest area and found to have a BAC, (Blood Alcohol Concentration), of 0.02 you will: Be placed out of service for 72 hours. Be in trouble with your dispatcher. Be placed out of service for 24 hours.

when the hydraulic brakes fail while you are driving, the system will not build up pressure and the brake pedal will feel spongy or go to the floor. what should you do?. pump the brake pedal to generate pressure. push down the brake pedal as hard as you can. put the vehicle in neutral and set the parking brake.

in mountain driving you will have to use a lower gear to drive safely on the grade. which of these does NOT affect your choice of gear?. the lenght of the grade. the weight of the load. tire treads depth.

what should you do before driving in mountains?. know escape ramp location on your way. unhook your steering axle brake. carry the tire chains in your vehicle.

escape ramps: should be used by any driver who loses braking power. are not designed for tractor-double trailers. are designed to slow vehicles so they can get back on the road at a safe speed.

which of these is NOT a danger of rough acceleration?. mechanical damage. tire damage. damage of a coupling.