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CDL Gen Knowledge
General Knowledge
| Question | Answer |
|---|---|
| As the blood alcohol concentration (BAC) goes up, what happen | Judgement and self control are affected |
| Implied consent mean | you have given your permission to be tested for alcohol in your blood |
| The total weight of the powered unit, the trailer, and the cargo is called | gross combination weight |
| If you do not have a CB radio what is the 1 thing you should do. | protect the area |
| Which of these is true about mirror adjustment? | you should adjust your mirrors prior to starting a trip |
| Brake fade | can be cause by the brake getting very hot. |
| On which fires can water be used | tires |
| which of these statements about engine overheating is true ? | You should never remove the radiator cap on a pressurized system until it has cooled |
| Which of these is not a danger of rough acceleration? | Tire Damage |
| Which of these is true about the use of a heater ? | When driving in winter weather, you should check that the heater is working |
| What is the proper way to hold the steering wheel? | with both hands firmly, on opposite sides of the wheel |
| if you have a heavy load that is slowing you down on an upgrade, you should | shift into a lower gear |
| Which of these is not a danger when an automatic transmission is forced into a law gear at high speed? | loss of steering control |
| If possible a helper should be used to help back your vehicle | whenever you have to back |
| When looking ahead of your vehicle while driving you should look | back and forth, near and far |
| How far ahead of the vehicle should the driver look while driving ? | 12-15 second |
| Which of these is the proper way to signal to change way | signal early and change lanes slowly and smoothly |
| You should signal continuously while turning because | you need both hands on the wheel to turn safely |
| The primary cause of fatal crushes is | driving too fast |
| you should try to park so that | you can pull forward when you leave. |
| you are driving a vehicle at 45 mph on dry pavement. About how much total stopping distance will you need to bring it to stop ? | The length of a football field. |
| when driving at night, you should use your low beam when an oncoming vehicle is within | 500 feet |
| You are driving in an area with few streetlight on clear night. If you cannot see well with your headlight, which of these actions would help? | use your high beams when legal and keep your interior light off? |
| what happen to tar in road pavement when it get extremely hot? | it bleeds, making the road surface slippery |
| What is the best advice for drivers when a heavy fog occurs | park at a truck stop or rest area until the fog has lifted |
| which of statement about cold weather driving is true? | windshield washer antifreeze should be used |
| Strong wind most affect driving | upon existing tunnels |
| You are driving on a two lane road. An oncoming driver drifts into your lane headed straight for you. Which of these is most often the best action to take ? | steer to the right |
| you can see a marking on vehicle ahead of you. the marking is red triangle with an orange center. what does the marketing mean ? | it may be a slow moving vehicle |
| Hydroplaning | is more likely when tire pressure is low |
| What should you do when your vehicle hydroplanes | release the accelerator |
| In the event of a rear tire failure, dual rear tires | will usually prevent fishtailing |
| Which of these is correct about emergency or evasive action | In order to turn quickly you must have a firm grip on the steering wheel |
| most serious skids result from | driving too fast for condition |
| Over Length, over width, or over weight loads | require a specials transit permit |
| containerized loads | are generally used when freight is carried part way by rail or ship |
| which of these statement about an inspection of suspension components is true | axle mounts should be checked at each point where they are secured on the vehicle frame and axle |
| should brake adjustment be checked often | yes, because brake can get out of adjustment when they are used a lot |
| Which of these is NOT part of the pre-trip inspection of the engine compartment | valve clearance |
| A full stop is required at a railroad grade crossing when. | The nature of the cargo makes a stop mandatory under state, or for incompatible items |
| You do not have a hazard materials endorsement on your commercial driver license. You can drive a vehicle hauling hazardous materials when | the vehicle does not require placards |
| 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. What 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 |
| If your brakes fail on a downgrade, you must first | look outside your vehicle for another means of slowing you. |
| To help you stay alert while driving you should. | Take shorts breaks before you get drowsy |
| Which of the following is a good way react to an aggressive driver | give the driver the benefit of the doubt |
| If you must use a cell phone while driving, you should | pull off the road onto a safe legal position |
| Which of these statement about staying alerts to drive is true? | sleep is the only thing that can overcome fatigue |
| Medicines used to treat the common cold | often makes you drowsy and thus should not be used while driving |
| Which of these statement about drugs is true ? | use of drugs can lead to accidents and/ or arrest |
| Which of these statements about causes of vehicles fires is true? | poor trailer ventilation can cause cargo to catch on fire |
| What will help keep an engine cool in hot weather | making sure the engine has the right amount of oil |
| which of these statement about marking a stopped vehicle is true | If a hill or curve keeps other from seeing the vehicle within 500 feet, the rear triangle should be moved back down the road to give adequate warning |
| which of these do not provide extra gears on some | automatic transmission |
| Which of these actions is not recommended for a left turn? | start in the inside lane and swing right as you turn |
| what is counter steering | turning the wheel back in the opposite direction after steering to avoid an traffic emergency |
| Which of these statement about downshifting is true? | when you downshift for a curves, you should do so before you enter the curve |
| why is it important to shift gears correctly? | keep control of the vehicle |
| backing a commercial vehicle is | always dangerous |
| You see a car approaching from the rear; the next time you check your mirror the car is gone. You wish to change lanes. You should | wait to change lanes until you are sure the car isn't in your blind spot |
| The distance you should look ahead of your vehicle while driving is _ of a mile at speed | 1/4 |
| You are driving a heavy vehicle. You must exit a highway using an off ramp that curves downhill. You should | slow down to a safe speed before the curve |
| When you are driving on a SNOW packed road you should reduce your speed by at least | 1/2 |
| merging onto a road is safest if you | wait for a large enough gap in traffic to enter the road |
| If you are being tailgated you should | increase your following distance |
| what should you do if a car coming toward you at night keep it high beams on | look at the right side of the road |
| The road you are traveling on become very slippery due to glare ice. which of them is a good thing to do in such a situation | stop driving as soon as you can safely do so |
| Your brakes can get wet when driving through heavy rain. What can this cause when the brakes are applied | trailer jack-knife |
| you should avoid driving thought deep puddles or flowing water, but if you must which of these steps can help keep your brakes working | greatly putting on the brakes while driving through the water |
| When driving thought work zone you should | use your 4 way flasher or brake light to warn others |
| The best drivers are those that watch and prepare for hazards. This is called being | defensive |
| which of the below is not a characteristic of a front tire failure ? | vehicle fishtail |
| when hydraulic brake fail while driving, what auction should you take ? | Pump the brake pedal to generate pressure |
| Your vehicle has hydraulic brakes. While traveling on level road you press the pedal and it goes to the floor . which of these statement is true | Pumping the pedal may bring pressure up so you can stoop the vehicle |
| Which of these happen when a tire blows out at highway speed? | a vibrating feeling |
| How do you correct a rear wheel or drive- wheel acceleration skid? | stop accelerating |
| Which of these systems should receive extra attention during cold weather inspection ? | exhaust |
| Can federal inspectors inspect your truck or bus? | yes and they can put it out of service if is unsafe |
| which of these statement about tires is true | you should inspect your tire every 2 hours or every 100 miles when driving in hot weather |
| If you are not sure what to use to put out hazardous materials fires, you should | wait on qualified firefighter |
| When you are driving on grades , which of theses is the best way to choose a safe | based on your vehicle and it cargo, select a safe speed that is within the speed limit |
| when confronted by an aggressive river, the very first thing you should do is | make every attempt to get out of their way |
| In bad weather, many cars tailgate large vehicles. | increase your following distance so you can avoid quick maneuvers |
| which if these statements about vehicle fires is true | a burning tire should be cooled with water |
| optional safety equipment may include emergency number, tire chains, and | tire changing equipment |
| After starting the engine | The coolant temperature gauge should begin a gradual rise to the normal range |
| Retarders can be used | only where permitted by law |
| Which of these statements about brakes is true? | The heavier a vehicle or the faster it is moving the more heat the brakes have to absorb to stop it |
| what is the term for a commercial vehicle's habit of swinging wide in a turn | off tracking |
| Which of these statements about double clutching and shifting are true? | you can use the tachometer to tell when to shift |
| According to driver's manual why should you limit the use of your horn | it can startle other drivers |
| You are driving a vehicle that could be safely driven at 55, but traffic is heavy and moving at 35 even though the limit is 55. What is the safest speed for you? | 35 MPH |
| Whenever you double your speed, how much more distance does it take to stop ? | 4 time the distance |
| How does the weight of the vehicle affect stopping distance? | empty truck can take longer to stop than loaded ones, but this usually not the case for buses |
| Which of these statements about overhead clearance is true? | the weight of a vehicle change its height |
| Which of these is a good thing to do when driving at night | keep your speed slow enough that you can stop in the range of your headlight |
| which vehicle will be most affected by strong winds? | a set of empty doubles |
| when the roads are slippery, you should | make turn as gently as possible |
| Which of these it not true about emergency braking ? | it is not important how you brake in an emergency |
| which of these is the most important thing to remember about emergency braking | If the wheels are skidding you cannot control your vehicle |
| Where or how is cargo blocking used? | in the front ,sides, and back of cargo, usually at the floor |
| Bridge formulas | permit less maximum axle weight for axles that are closer together |
| You are checking your brakes and suspension in a pre trip inspection. which of these statements is true ? | brake shoes should not have oil, grease, or fluid on them |
| What is most important reason to inspect your truck or bus? | safety |
| Driver of trucks and tractors with cargo must check the securement of the cargo within how many miles of starting the trip | 50 |
| You do not have the hazardous materials endorsement on your CDL. You are asked to haul a load of hazardous materials requiring placards. You should: | Refuse to haul the load |
| What is the first thing you should do if your brakes fail while going down a hill? | get off the road as soon as possible |
| Escape ramps: | should be used by any driver who looses braking power |
| which of the following best describes how sleep debt can be paid off? | it can only be paid off by sleeping |
| If you have been drinking alcohol, you should | wait for it to wear off |
| when a doctor prescribe medication for you and you know you will be driving, you should | ask the doctor if the medication will affect your driving |
| To determine the blood alcohol concentration (BAC) for a person , it is necessary to | how much the person weight |
| which of these is not a good rule to follow when caring for the injured at an accident scene | Keep the injured person cool |
| You should use your mirrors to check | where the rear of the vehicle is while you make turns |
| which of these statements about backing a heavy vehicle is true? | you should avoid backing whenever you can |
| If you must cross into the oncoming lane as you make a turn, you should | watch for oncoming traffic |
| When you are parked at the side of the road, you must | turn on your 4-way flasher to warn others |
| which of these statements about speed management is true | you should choose a speed that let you stop within the distance that you can see ahead |
| when driving on road where truck speed limits are lower than cars. you should | use extra caution when changing lanes or passing |
| You are driving a 40 foot vehicle at 35 MPH. What is the least amount of space you | 4 seconds |
| what 3 thing add up to the total stopping distance for you | perception distance, reaction distance, braking distance PRB |
| when driving at night you should use your low beams when an oncoming vehicle is within | 500 feet |
| What should you do before driving in mountain? | know the escape ramp location on your route |
| A car suddenly cuts in front of you creating a hazard. which of these actions should you not take | honk your and stay close behind the car |
| what should you do when you see a hazard in the roadway ahead of you | use your 4 way flashers or brake light to warn other |
| You are driving on a level highway at 50 MPH. There are no other vehicles around you. A tire blows out on your vehicle. what should you do first? | stay off the brake until the vehicle has slowed down |
| what does emergency braking mean | responding to a hazard by slowing the vehicle |
| Having ABS on only the tractor will | give you more control over the vehicle |
| which of these statements about cargo is true | unstable loads such as hanging meat or livestock can require extra caution in curves |
| A principle to remember about loading cargo is to keep | balanced in the cargo area |
| Which of theses is not a brake check you normally do during the walk around inspection | amount of fuel in the vehicle |
| which of these statements about shipping hazardous materials is true | a diamond-shaped hazardous label must be on the package |
| placards must be | placed on all 4 side of the vehicle |
| you must stop on a hill or a curve on a divided highway. how far back should you place the rear most triangle. | as far back as necessary to warn other |
| You are driving a never truck with a manual transmission. what gear will you need to take a long downhill grade. | a lower gear than you used to climb the hill |
| Aggressive driving is | driving a vehicle in a bold, selfish, pushy manner |
| ABS uses sensors and computer to sense | potential wheel lockup |
| The distance you should look ahead of your vehicle while driving at low speeds is what distance ? | 1 block |
| At dawn or dusk or in snow, it can be hard to see and be seen. you can let other know you are there by | turning on your light |
| You are driving through a work zone. You should | lower your speed even farther any time worker are present |
| when driving down a mountain you will have to use lower gears to drive safely which of these does affect your choice of gears | tire tread depth |
| Which of theses is a danger of crossing tracks on a dirt road | you could get hung halfway across the tracks |
| which of these is a good thing to do when steering to avoid a crush? | don't turn more than needed to miss whatever is in your way |
| if a straight truck goes into a front wheel skid, it will | go straight ahead even if the wheel are turned |
| which of theses light cannot be checked at the same time | turn signals, brake lights, and 4-way flashers |
| when driving in cold weather, your tire tread depth should | provide enough traction to steer and get through the snow |
| if you react__ slower, your chances of a crush can double | 1/2 second |
| which of theses is true about hours id service? | you should balance you hours of service with enough sleep to keep you alert |
| which of these is not a brake check you normally do during the walk around inspection? | hydraulic cylinder leaks |
| which of these is a good thing to remember about drinking alcohol. | alcohol affects judgement and self controls, which are necessary for sale driving |
| To avoid an accident, you moved to the shoulder. forced to return to the road, you should | Using mirrors and turn signals, turn sharply to get back to the road |
| When exiting or entering on a curved freeway ramp, you should | Maintain a speed 5-10 mph under the posted speed limit |
| You will be placed out of service for 24 hours if your blood alcohol concentration (BAC) is at least | Any detectable amount |
| Sometime you need to leave a road to avoid a hazard or emergency. When you do, you should keep in mind that | it less dangerous to drive onto the shoulders than to a cause a Collison |
| Which of the following statements about speed management is true? | If you double your speed, stopping distance will be increased by 4 times |
| which of these is a good thing to do when steering to avoid a crash | don't turn any more than needed to clear what is in your way |
| 1.3. Which of these statement is true ? | Many heavy vehicle accidents occur between midnight and 6 a.m. |
| when is it necessary to learn how a fire extinguisher works? | before the fire happens |
| Gross Vehicle Weight(GVW) means the following | Total weight of a single vehicle plus its load |
| You must park on side of a level straight, four lane divided highway | one within 10 feet of the rear of the vehicle, one about 100 feet to the rear, and one about 200 feet to the rear |
| When you are starting to move up a hill from a stop | Release the parking brakes as you apply engine power |
| Which of the following is not a characteristic of tire failure | cold steering |
| Convex (curved) mirrors: | They show a wider area than flat mirrors show |
| Which of these is not a type of retarder | Robotic |
| When driving through the work zone, you should | watch for sharp pavement drop off |
| 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 24 hours |
| During the vehicle inspection, checking of ___ will not prevent a fire | Battery fluid level |
| What should you do if you are unsure whether you have enough overhead clearance? | found another route |
| if a coolant container is part of a pressurized systems, which of these is true? | you can check the coolant level while the engine is hot. |
| The purpose of the retarders is to | Help slow the vehicle while driving and reduce brake wear |
| Controlled braking | Is used to keep a vehicle in a straight line when braking |
| You should stop driving | whenever you become sleepy |
| Which of these statements about brake is true | Brakes have more stopping power then they get very hot |
| When you are parked on the side of the road at night, you must | Turn on your four- way-emergency flasher to warn other |
| When going down a long steep downgrade, you should always | use the braking effect of the engine. |
| The distance tat you should look ahead of your vehicle while driving amounts to about_ miles at normal highway speed | 1/4 |
| You are starting your vehicle in motion from a stop. As you apply power to the drive wheels. they start to spin. You should | Take your foot off the accelerator |
| Your vehicle 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 time | you can almost always turn to miss an obstacle more quickly than you can stop |
| when starting a bus on a level surface with good traction, there is often no need for | Parking brakes |
| to prevent a load from shifting, there should be at least one tie-down for every __ feet of cargo | 10 |
| When starting a bus on a level surface with good traction, there is often no need for | parking brakes |
| Driver of trucks and tractor-trailers with cargo must check that the cargo is well secured within the first __ miles of the trip | 50 |
| You do not have a hazardous materials endorsement in your commercial driver license. You can drive a vehicle hauling hazardous materials | The vehicle does not require placards |
| Which of these is true about hazardous materials | All hazardous materials present health and safety danger |
| which of these statement about cold weather driving is true | windshield washer antifreeze should be used |
| Which of the statements about backing a heavy vehicle is not true? | Because you cannot see, you should back slowly until you slightly bump into the deck |
| You must park on a side of a level, straight, four lane divided highway. 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 200 feet to the rear |
| If you need to leave the road in a traffic emergency, you should : | Avoid braking until your speed has dropped to about 20 mph |
| Which of these statement about certain types of cargo is true ? | unstable load such as hanging meat or livestock can require extra caution on curves |
| when driving at night, you should: | adjust your speed to keep your stopping distance within your sight distance. |
| For your safety, when setting out reflective triangle you should | Hold the triangle between yourself and oncoming traffic. |
| A key principle to remember about loading cargo is to keep the load | Balanced in the cargo area |
| You should signal continuously while turning because | You need both hands on the wheel to turn safely |
| Which of these is not something you should do if your headlight are not working properly | leave on your high beams |
| when you are starting to move up a hill from a stop | release the parking brakes as you apply engine power |
| There are two types of jackknife, they are | Both trailer and tractor |
| Extra care is needed to keep your vehicle centered in your lane because commercial vehicles | are often wider than other vehicles |
| You are required to inspect your truck within how many miles after beginning the trip | 50 |
| communication means | To communicate your intention to other motorists |
| sometimes you need to leave a road to avoid a hazard or emergency. When you do, you should keep in mind that | It is less dangerous to drive onto the shoulders than to cause a collision |
| You are inspecting hydraulic brakes. You should pump the brake pedal three times then apply firm pressure to the pedal for five seconds. if the brake are working properly the pedal should | not move |
| When starting a bus on a level surface with good traction, there is often no need for | parking brakes |
| Which if these is not a danger when an automatic transmission is forced into a low gear at a high speed | a loss of steering control |
| perception distance is the distance your vehicle travel from the time | The eyes see a hazard to the time the brain knows that this is a hazard |
| Extra care is needed to keep your vehicle centered in your lane because commercial vehicles | Are often wider than other vehicles |
| You should light apply your brakes to flash the brake light if | you are about to exit the road and need to slow down |
| if you are convicted for driving under the influence while driving a commercial vehicle , and this is your first offense, you most likely will get | At least one year suspension of your CDL |
| You are checking your tires for a pre-trip inspection. Which of these statements is true | Tires of mismatched sizes should not be used together in the same vehicle |
| Which of these statements about alcohol is NOT true? | A drinker can control how fast his or her body absorbs alcohol |
| Which of these is a good thing to remember about using mirrors | There are blind spots that your mirror cannot show |
| If a coolant container is part of a pressurized system, which of these is true | You can check the coolant level while the engine is hot |
| The tread depth on front steering wheel tires should be | Not less than 4/32 inch |
| Brake drums (or discs) must not have cracks longer than__ the width of the friction area | 1/2 |
| A vehicle is loaded with very little weight on the driver axle. What may happen | Poor traction |
| Which of these should be tested while the vehicle is stopped | Hydraulic brakes |
| You are checking your steering and exhaust system in a pre-trip inspection which of these problems, if found, should be fixed before the vehicle is driven | Steering wheel play of more than 10 degrees (2 inched on 20 inches steering wheel) |
| Which of the statements about an inspection of the suspension components is true? | Axles' mount should be checked at each point where they are secured on the vehicle frame and axles |
| which of these statements about rear drive wheel braking skid is true | on a vehicle with a trailer, the trailer can push the towing vehicle sideway |
| You should always turn on your emergency four-way flasher when you | park on the side if the road |
| The engine brake effect is greater when the engine is__ governed RPM and the transmission is in a __ gear | Near, lower |
| If a straight vehicle ( not a trailer or articulation) goes into a front-wheel skid, it will | go straight ahead even if the steering wheel is turned. |
| To correct a drive wheel braking skid, you should | stop braking, turn quickly, then counter steer. |
| The drivers manual suggest several thing to do when you pass a vehicle. Which of these is not one of them? | At night, turn on your high beams before you start to pass and leave them on until. you have completely passed the vehicle |
| which of these statement about tires and hot weather driving is true? | you should inspect your tires every two hours or every 100 miles when driving on very hot weather |
| Extra care is needed to keep your vehicle centered in your lane because commercial vehicles | are often wider than other vehicles |
| Which of these actions are not recommended for a left turn | start at the inside lane and swing right as you turn |
| what should be true about other drives? | short term or daily rental truck drivers are often not use to the limited vision, which makes these drivers a hazard |
| what is true about bad weather and driving conditions | when the temperature drops, the bridges freeze before the road |
| which of the statement about pre-tip inspection is true | if you need to tilt a cab, secure loose thing so that they could not fall or break anything |
| which of these statements about cargo loading is true | a state law dictates legal weight limit |
| which of these is not required knowledge for driver seeking a hazardous material endorsement | basic chemistry |
| to determine blood alcohol concentration level for a person, it is necessary to know | their weight |
| which of these rigs has a higher chance to ff-track while making a turn ? | Tractor with two 27-feet trailers |
| How much space in front of you is needed while driving on a highway | 1 second for each 10 feet of vehicle length |
| which of these should you not do in an emergency situation | It is not important how you brake in an emergency situation |
| Which of these is true about proper use of a steering wheel | only with an attempt of a difficult turn use both hands on the wheel |
| when should you test your parking brakes | while the vehicle is parked |
| controlled braking is | squeezing the brake firmly without locking them up. |
| one can recognize hazardous materials by looking at the container | label |
| Freeway exits can be dangerous for commercial vehicles. at what speed should you enter the exit | below the posted speed limit |
| space to the _ your vehicle is most important to manage | front of |
| You are checking your brakes and suspension system for a pre-trip inspection which of these statements is true? | Brake shoes should not have oil, grease, or brake fluid on them |
Created by:
0321steve