CDL General Knowledge Exam Practice Study Questions and Answers Parts I and II



question number one you should cover your cargo because many states require it to protect your cargo from bad weather to protect individuals from any spilled cargo all these are correct question number two what can you do at an accident site to help avoid another accident correct answer is put out warning devices so people don't run into the accident site we have a explanation here unless you are injured as a commercial driver it's your duty to ensure that drivers see your vehicle at the accident scene you should put out warning devices as quickly as possible as a means towards preventing further accidents for example a pileup question number three what is not one of the four skill areas that operating a commercial motor vehicle requires so in this particular case you're looking for a skill that is not required for operating a CMV commercial motor vehicle what is not required is a first aid certification okay but the required ones are steering accelerating and safely backing so let's go over the explanation while first aid certification could certainly come in handy at some point during your career it is not one of the four skill areas mentioned that you must be proficient in for safe vehicle operation question number four how many tied ounds are required for a 20 foot load correct answer is two tie-downs and we have a bit of an explanation here so let's go over that the rule is that you should have one tie-down per 10 feet of cargo and you must have at least two per load regardless of the length so 20 feet you would have to question number five the most important hand signal you should agree on with your helper is the correct answer is stop and we have an explanation unfortunately let me just scroll this up some unfortunately one apartment unfortunately once an accident happens you can't take it back that's why it's absolutely essential that you and your helper have a very clear hand signal for stop so that you'll be able to stop what you are doing quickly before an accident occurs question number six how can you start moving without rolling backwards now we have a question here where all the answers are correct so let's go over each and every one of them engage the clutch before removing your foot from the brake put on the parking brake whenever necessary apply the hand valve now we have an explanation so let's go over that if you have a manual transmission vehicle partly engage the clutch before you take your right foot off the brake put on the parking brake whenever necessary to keep from rolling back release the parking brake only and just repeat that release the parking brake only when you have applied enough power engine power to keep the to keep from rolling back on a tractor trailer equipped with a trailer brake hand valve the hand valve can be applied to keep from rolling back let's go on to the next question question number seven to maintain alertness during the trip drivers should now in this particular situation all the answers are correct we'll go over each one the first one is get eight to nine hours of sleep schedule trips during the daytime hours and avoid medications that cause drowsiness now we have an explanation let's go over that sleep debt is a dangerous condition in which missing sleep adds up and you risk falling asleep at the will until you are are fully rested people often people are often surprised when they find out that getting less than six hours of sleep per night triples your risk of accident to prevent drowsiness before a trip the trouser the driver that is the driver should get adequate sleep adults need eight to nine hours of sleep to maintain alertness prepare route carefully to identify total distance stopping points and other logistics and logistical considerations schedule trips for the hours you are normally awake not in the middle of the night drive with a passenger avoid medications that cause drowsiness consult your physician if you suffer from daytime sleepiness have difficulty sleeping at night or take frequent naps incorporate exercise into your daily life to give you more energy okay next question question number eight which of the following is a key steering component okay none of the distractors are so the correct answer is the gearbox and we have an explanation the gearbox is an integral part of this system all the other options are key pieces of the suspension system number 10 what is or makes up a hazardous materials placard the correct answer is signs on the outside of the vehicle that identify the hazard class of cargo we have an explanation here hazardous material placards are for regulated signs on the outside of the vehicle that identify the hazard class of cargo for those who need to know such as emergency service personnel or those who load or unload cargo next question number 11 what will help a person intoxicated with alcohol to sober up the only correct answer is time and the explanation is there are no fast answers for getting the alcohol out of your system since it is inside your bloodstream coffee and fresh air will not do the trick you must wait until you are sober or you risk losing your CDL if you drive while under the influence next question the minimum tire tread depth for the front tires is for thirty seconds of an inch and we have an explanation the minimum is for 30 seconds inch depth for tire tread on the front tires Wow all the other tires require at least two thirty seconds inch of tread depth so remember this front for thirty seconds everything else to thirty Seconds okay next question go number question number 12 which of the following should you do when confronted by an aggressive driver now this is one of the situations where all the answers are correct so let's go over each one of the options number one if you can safely do it call the police from a cell phone also avoid eye contact and ignore ignore rude gestures and refused to react negatively so all the answers are correct and we have an explanation here when in when an aggressive driver is trying to confront you don't supply them the conflict they desire instead contact the police and request help next question question number 13 where should you place your warning devices if you must stop on a one-way or divided highway the correct answer is 10 feet 100 feet and 200 feet towards approaching traffic and it helps me you know if you're like pulling off on a one-way or divided highway basically usually the on the approaching traffic is coming from the rear so all of your warning devices will be in the rear of your vehicle 10 feet 100 feet and at 200 feet now we have an explanation here so let's go over that on a one-way or divided highway you want to stretch your warning devices out but still have them close enough to the vehicle that makes it clear that you are stopped devices at 10 100 and 200 feet accomplish this goal next question question number 14 which of these is not part of the basic method for shifting up so we're looking for the answer that is not part so we know from this multiple choice type of question we have three that are part so the three that our part are releasing the clutch pushing in the clutch and shifting into higher gear at the same time and releasing the clutch and pressing the accelerator at the same time but we are looking for the not part so the not part which is not which of these is not part of the basic method of shifting up that would be accelerating pressing the clutch and turning toward the driver's side we have an explanation here so let's go over that you must release the accelerator push in the clutch shift to neutral release the clutch left the engine and gears slow down for the next gear then push end the clutch and shift into a higher gear at the same time then release the clutch and press the accelerator acceleration is not involved until the very end and definitely not while pressing the clutch let's take a look at these ok so let's go on to the next question question number 16 up front me 15 during your pre-trip inspection exam when examining hoses with the instructor you advised him that you are looking at the ground for actually and I just read that question wrong you advised him that you are looking for puddles on the ground ok which would be indicative of leaking hoses possibly so of course all the distractors are incorrect so let's go and look at the explanation during your pre-trip test when inspecting hoses you need to look for signs of leaks and cracks of the hoses such as puddles on the ground this puddle on the ground would would it be indicative of a leak which would result from a crack of a hose it says here fluids are that are dripping on the underside of the engine or transmission this is also check holds hoses for links or problems okay all right next question number 16 what is the gross vehicle weight GVW okay it's the total weight of a single vehicle and its load okay now we have an explanation here GVW is the simplest of the vehicle weight explanations standing for just a single vehicle and the load it is carrying next question number 17 you should place the starter switch key in your pocket while you are performing the pre-trip inspection because someone could start and move the truck and if you are stay behind the vehicle or in front of it that could be a bad thing now we have an explanation here we're gonna go over that when you are performing a pre-trip inspection you do not want someone such as a co-driver to start your vehicle while unaware of your location and accidentally injure you also if you're looking at the engine and you're checking the belts or something and they start the engine it could take your hand off so definitely you want the keys to the vehicle in your pocket next question which two special conditions indicate that you are that for me which two indications are me I just keep making mistakes here I mean correct myself which two special which two special conditions indicate that you should downshift correct answer is starting down a hill and entering a curve let's take a look at the explanation downshifting before starting down a hill allows you to take advantage of engine braking you should downshift to the gear required which is usually lower than the gear required to climb the hill down shifting before a curve improves stability and ensures you will have the power available to accelerate out of the turn next question which of the following determines the safe speed for going down a steep downgrade now this will be all these are correct so what are the different components that are of this correct answer which of the following determines the safe speed for going down a steep downgrade the road conditions the total weight of the vehicle and cargo the steepness of the grade there are several factors that help you decide upon a safe speed for going down steep downgrade including its steepness length the road and weather conditions and your very and your vehicle and cargo weight number 20 is it true that as long as the engine is not overheated it is completely safe to remove the radiator cap no it's not completely safe the answer is no you have an explanation it is not enough for the engine not to be overheated the system should have cooled down completely and I emphasize the word completely before you even attempt to remove the radiator cap and even then you should be very careful as there may be tremendous pressure and damaging steam and fluids next question question number 21 while driving at night which lights should you use as often as you can now the operative word here is can you can't always use the high beams but the correct answer is high beams and here's the explanation let's just go over that when driving at night you should be using your high beams to expand your field of vision as often as possible as long as it is safe and legal and you will not blind any other drivers the rule of thumb is to put them on as long as there are no approaching vehicles within 500 feet next question question number 22 it has just reached freezing which of the following areas is slippery now this is one of the situations or one of the questions where we have all of them are correct so the components are which of the following areas are slippery a bridge when it's just reached freezing a shaded area when it's just reached freezing a wet looking road when it's just reached freezing all of those will be slippery let's go over the explanation once the temperature dips down to freezing some areas of the road will start to freeze the the first to go will be areas without Sun shaded areas and bridges if the road appears wet that could also herald the arrival of black ice a thin layer of slippery ice through which you can actually see the road okay next question what happens when you let air out of hot tires okay the correct answer is this is a bad idea because when the tires cool off the pressure will be too low okay let's go over the explanation when tires get hot when tires get hot the air pressure rises however relieving that pressure will leave the air pressure to low later and the tires may catch fire or blow out it will also not have a cooling effect if your tires are too hot to touch stop until they have cooled down okay next question question number 24 to help you stay alert and safe while driving you should and the correct answer is avoid medications with warning labels we have an explanation which is be careful with medications be careful with medications that warn you they may cause drowsiness if you have a concern about prescribed medications speak to your doctor do not even try to make up for sleepiness with coffee fresh air or especially alcohol the only cure for being tired is sleeping until you are arrested okay now we have question 25 okay which of the following should you not asking you what you should not do if you experience a tire failure so you're searching for an option that is not that is or you're searching for an option that is inadvisable in other words what you're not supposed to do with respect to this question okay so it's inadvisable to engage the brakes hard and immediately this is what you're not supposed to do okay what are you supposed to do if you experience a tire failure well you need to be aware that the tire has failed okay you need to hold the steering wheel firmly and you need to stay off the brake pedal and here's our explanation while it's natural to want to take control of the situation by braking slamming on your brakes could actually put the vehicle out of control so slowly brake once you are in control the vehicle okay that's been 25 questions we're gonna call this video part 1 and we will finish the other 25 remaining questions in part 2 question number 26 to transport cargo safely which of these are you not responsible for so in this question you're searching for the option which relates to non responsibility what is non responsibility and non responsibility essentially assuring the freshness of sealed cargo in other words what you're not responsible for is the correct answer so to analyze this question you need to find out what you're not responsible for so your options are which you would say you're responsible for is you're responsible for recognizing possible overloads you're responsible for inspecting the cargo and you're responsible for making sure the cargo is properly secured so you're not responsible for the state of sealed cargo nor can you inspect it you are only responsible for the safety of the cargo ensuring that it is balanced secured and not overloaded and does not get in the way of emergency equipment question 27 b.c fire extinguisher is not intended to be used on which of the following types of fire so we're looking for the one that it is not intended to be used on well the correct answer is wood so a B and C fire extinguisher can be used on in grease fire electrical fire gasoline fire and wood fire so what you need to do is acquaint yourself with the different types of fire extinguishers now analyze what type of fire that a BC extinguisher is intended to be used on okay you cannot use an a BC extinguisher on a wood fire a wood fire water would be the best thing probably put that out explanation a BC fire temperature is not for use on anything that you can normally use regular water on which includes wood paper and cloth these require a BC fire extinguisher or just an a fire extinguisher okay now so we have the breakdown on the different types of fire extinguishers here we have AE which is for trash wood paper fire extinguishers with Class A rating are effective against fires involving paper wood textiles and plastics the primary chemical used to fight these fires is mono aluminium phosphate because of its ability to smother fires and these types of materials I'm not so sure about using water on plastic my personal opinion but I suppose you could do it but for a wood fire I would definitely suggest water now the next class is B which is for liquids fire extinguishers with a Class B rating are effective against flammable liquid fires these can be fires where cooking liquids oil gasoline kerosene or paint have become ignited two commonly used chemicals are effective in fighting these types of fires mono ammonium phosphate well that's what it is a mono off ammonium I think I said my set of mono aluminum but if I did I apologize its mono ammonium phosphate while sodium bicarbonate includes a chemical reaction which extinguishes the fire sodium bicarbonate is baking soda okay and lastly we have Class C electrical equipment fire extinguishers with a Class C rating are so suitable for fires in live electrical equipment both mono um ammonium phosphate and sodium bicarbonate are commonly used to fight this type of fire because of their non conductive properties okay I think that's it on the explanation let's take a look at the next question question number 28 how many seconds does it take for a normal tractor-trailer to clear a double track the correct answer is more than 15 seconds the explanation is you can expect it to take more than 15 seconds for a regular tractor-trailer to clear a double track and 14 seconds to be safely over a single or to be over a single track okay number 29 an anti-lock braking system will correct answer keep your brakes from locking up when you brake hard and the explanation is abs only really kicks in to save you from over braking and will not change the way you normally brake it doesn't stop you from needing to engage in careful braking and defensive driving and is no substitution for good brakes and maintenance it will however save you from having your brakes lock and getting in an accident question number 30 why is it important to use a helper when backing correct answers because you have blind spots the explanation using a helper when you are backing up is important since you will be dealing with blind spots that you are completely unable to see before you start work out a hand signal for go for stop and go but your most important one is stop okay question 31 always try to back toward the driver's side because correct answer you can see better watching the vehicle rear out of the side window the explanation is you should always back toward the driver's side because you will be able to see things much more easily for example you can keep an eye on the vehicles rear by viewing it out of your side window if your truck pulls toward either direction it needs service your next comfort should not affect your safety decision pardon me okay question number 32 how can you determine if your vehicle is equipped with ABS now in this particular situation all the answers are correct so let's go over each one check if your vehicle was manufactured after March 1st 1998 they are required to have a panel light second option check for yellow ABS malfunction lamps on the instrument panel and final option look for wheel speed sensor wires that are coming from the wheel are departing from the rear of your brakes and again all these are correct the explanation is most vehicles now will have a light on the instrument panel that will illuminate briefly when the vehicle is started to alert you about the ABS but you can always check for wires from your brakes question 33 the definition of hazard is and the correct answer is a road user or road condition that could be a possible danger and the explanation is a hazard is something that could go wrong but it won't if you've been vigilant question 34 starting the engine and inspecting a cab involves each of these tasks except so here you're looking for the exception so well what is it involved what involves checking the transmission controls it involves checking the air pressure gauge it involves starting the engine then listening for unusual noises okay but the question is asking for the exception so the correct answer is what it doesn't involve it doesn't involve starting the engine then pulling apart me starting the engine then putting the gearshift in neutral so now with respect to this question only this is not the answer that you're looking for you're looking for the not answer so this is sort of like a trick question instead of asking what you should do they're asking you basically what you shouldn't do and here's an explanation please note that the question contains and accept Clause when performing this part of the inspection however you must put the gear shift in neutral then start the engine and listen for any unusual noises once you perform the engine check you will check all of your gauges and controls such as the air pressure gauge and transmission controls question number 35 which of the following statements about retarders is correct on this particular question all of the answers are correct so let's go over each one the first option is retarders help slow vehicle reducing the need for using your brace section the second option is you should turn the returns retarders off whenever the road is wet icy or snow covered an option number three when you drive wheels parmi when your drive wheels have poor traction the retarders may cause them to skid again all the answers are correct so let's go to the explanation while retarders can help reduce the need for your brakes they can make it more likely for you to skid in inclement weather or whether your wheels experience poor traction or permanent or whenever you will experience poor traction on I apologise because of this you should always turn off your retarders in poor whether question number 36 what is the best way to figure out how many seconds of following distance you have correct answer is wait until a vehicle passes a shadow or a landmark then count the seconds until you pass we have an explanation which says count how long it takes for you to reach the landmark after the car in front of you by counting like so 1,001 1,002 and you will have your following distance in seconds all other methods are dangerous and we'll get you a true following distance and per me will not give you a true following distance remember following distance needs to be increased in traffic bad weather for heavy vehicles or at higher speeds question number 37 you don't want to be a distracted driver so you and the correct answer is turn off your cell phone until you reach your destination and we have an explanation TAS that make you a distracted driver always make you distracted whether you think it's an easy portion of your trip or a straight section of road do not eat drink smoke text read or have a difficult conversation while driving in an ideal situation turn off your phone and keep it off until you are drunk until you are done driving for the day question number 38 which of these is the most important thing to remember about emergency brakes and the correct answer is if the wheels are skidding you cannot control the vehicle question number 39 the parking brake should be tested while the vehicle is and the correct answer is moving slowly question number 40 which of these statements about tires and hot weather driving are true the correct answer is you should inspect your tires more often question number 41 what factors determine a person's blood alcohol content and the correct answer in this particular question is all the above so let's look at the options the first option is how much alcohol you drink option number two how fast you drink and the third option is how much you weigh question number 42 hazardous material placards are and the correct answer is all the above so let's look at the correct options that we have hazardous material placards are placed on the front rear and both sides of the vehicle second option 10 and 3/4 inches square and the third option turned upright on a point in a diamond shape all of these are correct question number 43 true or false when fighting an engine compartment fire it is best to lift the hood in order to target the fires base the correct answer is false lifting the hood would permit more oxygen to feed the fire hence you'd have more of a fire so leave the hood down and possibly and so lifting it up you could burn yourself so be Carey be very careful and let's get to the next question question number 44 what are the three rules for using your turn signals the correct answer is one signal early to signal continuously and three make sure the signal turns off after the turn is completed question number 45 when you are on top of a hill and know you will be going down a steep grade which statement is true and the correct answer in this particular case is always downshift to a gear lower then you came up the hill before starting down the grade question number 46 which of these requires a greater stopping distance the correct answer is an empty vehicle question number 47 when inspecting the parts of a braking system you should pay special attention to the following and the correct answer is all of the above so let's go over the options cracked brake drums you should pay attention to that brake shoes with oil grease or fluid on the shoes you should pay attention to that broken missing damaged or heavily worn shoes you should pay attention to that so all the above answers are correct question number 48 when caring for someone who is injured you should and in this particular question all of the answers are correct so let's go with the options option number one only move them if they are in danger from fire or traffic option number two apply direct pressure to any wounds and option number three keep the injured person warm so all of the above are correct question number 49 for an average driver driving 55 miles per hour on a dry pavement in order to bring the vehicle to a stop it will take about and the correct answer is the length of a football field question number 50 you are driving a 40 foot vehicle at 45 miles per hour driving conditions are ideal dry pavement good visibility the least amount of space that you should keep in front of your vehicle to be safe is the distance you would travel in and the correct answer is five seconds you

13 thoughts on “CDL General Knowledge Exam Practice Study Questions and Answers Parts I and II”

  1. Can someone point me in the correct direction i need a video about CDL General Knowledge "The breakdown" for an example i know parts like managing space and cargo securement , safety and such are a major part of it i learn better this way please and thank you…

  2. How many question for general knowledge I have to read and for airbrakes and for combination vehicle How many questions on each one of those
    If you can please help me thank you

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