CDL General Knowledge

You are drving on straight , level highway at 50rpm. There are no vehicles in front of you. Suddenly a tire blows out of your vehicle, what should you do first?

stay off the brake until the vehicle has slowed down

you are driving a truck with manual transmission. what gear will you probably have to use to take a long, steep downhill grade?

a lower gear than youd take going up the hill

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 are checking ou tires for a pre-trip inspection. which of these statements is true?

tires of mismatched size should not be used together in the same vehicle

If a straight vehicle (no trailer or articulation) goes into a front wheel skid it will:

go straight ahead even if the steering is turned

if you need to leave the road in a traffic emergency, you should:

avoid breaking until your speed has dropped to about 20mph

which of statements about certain types of cargo is true?

unstabel load such as hanging meat or livestock can require extra caution on curves

according to the drivers manual. why should you limit the use of the horn

it can startle other drivers

you do not have a HAZMAT endorsement on your commercials drivers license. you are asked to deleiver hazardous material in a placarded vehicle, You should:

refuse to haul the load

which of these statements about staying alert to drive is true?

sleep is the only thing that can overcome fatigue

Your vehicle has hydraulic brakes. While traveling on a level road, you press the brake pedal and find that it goes to the floor. Which of these statements is true?

pumping the break perdal may bring the pressure up so you can stop the vehicle

you are drving a vehicle at 55 mph on dry pavement. About how much total stopping distance will you need to bring it to a stop?

the length of a football field

which of these statments about cold weather driving is true?

windshield washer antifreeze should be used

when driving at night, you should:

adjust your speed to keep your stopping distance within your sight distance

which of these statments about downshifting is true?

when you downshift for a curve you should do so before you enter the curve

for you safety when setting out reflecive traingles you should:

hold the traingles between yourself and oncoming traffic

as the blood alchol concentration (BAC) goes up, what happens?

judgment and self-control are affected

which of these is a good thing to remember about using mirrors?

there are blind spots that your mirror cannot show

hydroplanning:

is more likly to happen if the tire pressure is low

if you are being tailgated, you should?

Increase your following distance

a key principle to remember about loading cargo is to keep the load:

balanced in the cargo area

how far should a driver look ahead of the vehicle while driving?

12 - 15 seconds

how do you correct a drive wheel acceleration skid?

stop accelerating

The purpose of 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.

which of these is a good thing to do when steering to avoid a crash

dont turn any more than needed to clear is in your way

you should stop driving:

Whenever you become sleepy

which of these is NOT a good rule to follo when caring for injured persons at an accident scene?

keep injured persons cool

You should avoid driving through deep puddles or flowing water. But if you must, which of these steps can help keep your brakes working?

gently putting on the brakes while driving through the water

which of these statements about drugs is true?

use of drugs can lead to an accident and/or arrest

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.

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. whichof these is a good rule to follow when putting it back in motion up the grade?

use the parking brake to hold te=he vehicle until the clutch engages

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

You must park on the side of a level, straight, four lane, divided highway. Where should you place the three reflective triangles?

one withing 10 ft of the rear of the vehivle, on about 100 ft to the rear, and one about 200 ft to the rear

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

brake fade

can be used by the brakes getting very hot

which of these statements about engine overheating is true?

you should never remove the radiator cap on a pressurized system until the system is cooled

which of these statements about overhead clearance is true

the weight if the cargo changes the height of the truck

which of these statements about vehicle fire is true?

a burning tire should be cooled with water

you must drive on a slippery road. which of these is a goof thing to do in such a situtation?

slow down gradually

which of these statments is true about acceleration is true?

rough accleration can cause mechanical damage

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.

When roads are slippery, you should:

Make turns as gently as possible

You are checking your brakes and suspension system for a pre trip inspection. Which of these statements is NOT true?

brake shoes should have brake fluid on them

The driver's manual suggests several things 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

the distance that 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

which of these is the most important thing to remeber abouut emergency braking?

if the wheels are skidding you cannot control your vehicle

which of these statments 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 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 a time?

you can almost always turn to miss an obstacle more quickly than you can stop

in case of which fires can you use water to put it out?

tire fire

To help you stay alert while driving, you should:

take periodic breaks

to avoid a crash you had to drive oneto the right shoulder. you are now driving at 40 mph on the shoulder. How should you move back into the pavement?

if the shoulder is clear, stay on the right until your vehicle comes to a stop then move back into the pavement when it is safe

which of these statements about driving in areas with strong wind is true?

winds are escpecially a problem when coming out of the tunnel

which of these is a good thing to do when driving at night?

keep your speed slow enough that you can stop within the range of your headlights

you are driving a 40-ft vehivle at 35 mph. the road is dry, and visibility is good. what is the least amount of space you should keep infront of your vehicle to be safe?

4 seconds

what is the proper way to hold a steering wheel?

with both hands, on opposite sides of the wheel

high beems should be:

used when it is safe and legal to do so

you can see a marking on a vehicel ahead of you. the marking is a red triangle with an orange center. what does the marking mean?

it may ne a slow-moving vehicle

which of these is not part of the pre-trip inspection of the engine compartment?

valve clearance

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 tou can safely do so

you are driving a vehicle that could be driven safley at 55 mph on an open road. but traffic is heavy and other vehicles drive at the speed of 35 mph, though the speed limit is 55moh . the safest speed for your vehicle is more likely to be:

35 mph

what is countersterring?

turning the wheel back in the other direction after steering to avoid a traffic emergency

which of these statements about backing a heavy vehivle is true?

you should avoid backing whenever you can

which of these best describe how to use the break 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 again (bring the speed down 5 mph below your safe speed)

which of these statements about using turn signals is true?

when turning, you should signal early.

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 speed management is true ?

You should choose a speed that lets you stop within the distance that you can see ahead.

Retarders:

Can cause the drive wheels to skid when they have poor traction.

To correct a drive wheel braking skid, you should?

stop braking turn quickly and counter steer

When exiting or entering on a curved freeway ramp, you should:

Maintain a speed 5-10 mph under the posted speed limit.

Which of the following vehicles will have the longest stopping distance?

Empty truck

How many red reflective train angles are you required to carry?

3

You are required to inspect your truck within how many miles after beginning the trip

50

There are two types of jackknife, they are:

Both trailer and tractor

the BAC for commerical drivers to be considered intoxicated when driving a commerical vehicle is:

0.04

Where should the ignition key be during the pre-trip inspection?

in your pocket

when loading a trailer, if the cargo is loaded all to the rear, it may result in:

poor traction on drive wheels

communication means:

to communicate your intentions to other motorists

if you are convicted for driving under the influence while driving a commercail vehicle, and this is your first offense, you most likely will get:

at least one-year suspension of your CDL

if you are stopped at a roadside rest area and found to have a BAC of 0.02 you will:

be placed out of service for 24 hours

which of the following statements about speed management is true?

if your double your speed, stopping distance will be increased by 4 times

you are taveling down a long, steep hill, your brakes get so hot that they have failed. what should you do?

look for an escape ramp or escape route

the center of gravity of a load:

can make a vehicle more likely to tip over on curves if it is high

to prevent a load from shifting, there should be atleast one tie down for every _________ feet of cargo.

10

while driving, ice builds up on your wipers and they no longer clean the windsheild, you should:

stop safely and fix the problem

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

Which may be a sign of tire failure?

vibration

to prevent brake fade you should?

Select a gear that will keep your vehicle to a safe speed on steep downgrades.

A full stop is required at a railroad grade crossing when

the nature of the cago makes a stop mandatory under the state or federal regualtions

when driving at night you shouls use your high beams when oncoming traffic is not within _________ feet?

500

when driving through the work zone you should:

Watch for sharp pavement drop off

Backing a commercial vehicle is:

Always dangerous

when you are parked on the side of the road at night you must

turn you four-way-emergency flashers to warn others

you must stop on a hill or coruve on a two lane two way road. how far should you place reflective traingles?

within 500 feet behind you

stab braking should not be used on vehicles with:

anti-lock brakes

Sometimes you need to leave a road to avoid a hazard or emergency. When you do so you should keep in mind that?

it is less dangerous to drive onto the shoulder than to cause a collision

which of the following is NOT a characterisitc of tire failure?

cold steering

most skids:

Are caused by going too fast or trying to stop too quickly.

in bad weather mant drivers tailgate large vehicles. what should you do?

increase your following distance