CDL general knowledge

Where is the safety relief valve usually located?

In an air tank

If you have more than one license:

You will be penalized

An example of mandatory emergency equipment is:

A supply of spare electrical fuses

Why should the steps of a pre-trip inspection be done in the same order every time?

You will less likely forget a step

Backing up a trailer is dangerous because:

It is difficult to see behind the vehicle

______ is a thin layer of ice that forms on road surfaces

Black ice

If using a helper while backing up, where should they stand?

Near the back of the truck

When backing up a truck, you should:

Use both mirrors

Federal and State laws require:

Drivers to regularly inspect their vehicles

A header board is used to:

Protect the driver from moving cargo

Blocking a load helps:

stabilize the load

One way to overcome the challenges of blind spots is to:

Make frequent mirror checks and assess the positions of surrounding vehicles

What can happen if the air pressure gets too low in an air braking system?

The brakes may not work

Dollies equipped with ABS are required to have malfunction lamps located where?

On the left side

If a vehicle gets stuck on a railroad track, the driver should:

Get out of the vehicle and walk away from the track

When driving, it is important to: (surroundings)

Look at the front, sides, and rear of your vehicle

During a static leakage test,he maximum leakage rate for a single vehicle with air brakes is _______ in one minute

2 psi

If transporting 30 feet of cargo on a flatbed trailer, you should use a minimum of ______ to restrain the cargo

three tie-downs

If a person operates in both excepted and non-excepted intrastate commerce, which type of license should the driver select?

Non-excepted

While driving a vehicle, if an unusual noise or feeling occurs, the driver should:

Check the vehicle to determine the proper solutions

Dry bulk tanks:

usually have high centers of gravity

Poisonous fumes can enter the cab due to:

A defective exhaust system

A tank endorsement is:

Used when transporting both Liquids and Gases.

Be sure you are always driving so your vehicle can stop:

Within your view of the road ahead

If driving a truck that requires a CDL for operation: (seatbelt)

You are always required to wear a seat belt

A vehicle stopped at a green light may indicate that the driver:

Is impaired

What does the air compressor governor do?

Controls when the air compressor pumps air into the air storage tanks

When asked to complete a diver’s side parallel parking maneuver, you should:

Pull forward past the parking space, then back into it

When inspecting underneath your vehicle for leaking fluids, you must look for all of the following except:

-fresh oil

-coolant

-grease

-windshield wiper fluid

Windshield wiper fluid

When driving at highway speeds, you should watch the road about _____ ahead of your vehicle

One quarter (1/4) mile

While driving downhill, you should brake until you reach a speed that is _____ below your safe speed, then release the brake pedal.

5 mph

If the spring brakes are activated, you should never:

Push down the brake pedal

Roads are most slippery right after it begins to rain because:

The water mixes with oil and grease on the road

When a construction worker is close to the road, you should:

decrease your speed

Texting while driving a CMV is:

Prohibited

Emergency equipment, such as a fire extinguisher, is:

Required

While driving, you cannot: (texting)

Read text messages

A low air pressure warning signal should activate:

When tank pressure falls below 60 psi

As part of the vehicle inspection test, a CDL applicant may be asked to:

Check the engine oil level

Which of the following is not a crime that would disqualify an applicant from a hazardous materials endorsement?

-arson

-dishonesty

-robbery

-littering

Littering

While driving, if you notice anything affecting safety or mechanics, you should:

Make a written report that includes your conerns

The air entering air storage tanks may contain:

Water and compressor oil

While driving, you cannot: (phone)

Hold a phone to make a voice call

A cargo of hanging meat:

is unstable due to its high center of gravity

to inspect slack adjusters on S-cam brakes, you need to:

clock the wheel and disengage the parking brake

Rims with welding repairs:

Are unsafe

How much water must be present for a vehicle to hydroplane

A small amount

Driver should watch out for black ice when the temperature is ______ freezing and the road looks ______

below; wet

When approaching and driving through a work zone, you should:

1. use your 4-way emergency flashers or brake lights to warn drivers behind you,

2. observe the posted speed limits

3. slow down

You should be especially alert for drunk drivers:

late at night

Empty trucks require greater stopping distances. True or False?

True

Anti-lock brakes:

keep your brakes from locking up when you brake hard

CMV drivers who are convicted of a second DUI offense will lose their CDL driving privileges for:

life

To correct a drive-wheel braking skid, you should:

stop braking and countersteer

Which of the following statements about tire failure is true?

-if the steering feels heavy, it may be a sign one of the rear tires has failed

-it can take a few seconds for your vehicle to react, and you might think it was some other vehicle

-any time you hear a tire blow, you would be safest to assume it is not yours

-all of the above

it can take a few second for you vehicle to react, and you might think it was some other vehicle

In coming down steep downgrades, you should:

1. select an appropriate speed,

2. go slowly enough so your brakes dont get too hot

3. use a low gear

To keep you vehicle from rolling back when you start, you should:

partly engage the clutch before you take your foot off the brake

If you must drive slowly, how should you alert following drivers?

use you emergency flashers if it is legal

In order to protect yourself and others, you must be aware that children may do something hazardous because:

they tend to act quickly without checking traffic

Rough accelerations can cause:

mechanical damage

The most important hand signal you should agree on with a helper is:

stop

The low air pressure warning light is usually

red

When the road is very slippery, you should:

stop at the first safe place

After starting the engine, oil pressure should rise to a normal level:

within seconds

Braking distance is:

the distance your vehicle will travel, in ideal conditions, while you are braking

Perception Distance is:

the distance your vehicle travels, in ideal conditions, from the time your eyes see a hazard until your brain recognizes it

Reaction distance is:

the distance you will continue to travel, in ideal conditions, before you hit the brakes

When you see a hazard that will require slowing down, you should:

warn the drivers behind by flashing your brake lights

The size of motorcycles can cause you to misjudge their speed and distance. You should:

1. never share lanes with motorcycles

2. check twice for motorcycles before pulling out into traffic

3. use extra caution before you pull out in front of a motorcycle

How does ABS help you?

ABS helps you avoid wheel lock up and maintain control when you brake hard on slippery surfaces

Using a help when backing up is:

encouraged

When turning, you should:

always use turn signals to tell other drivers your intentions

Service lines are often coded with the color _____ to keep from getting them mixed up with the emergency line

blue

On any upgrade, _____, the more you will have to use lower gears to climb hills or mountains

• the heavier the load,

• the longer the grade

• the steeper the grade

• all of the above

all of the above

Skids caused by acceleration can usually be stopped by:

taking your foot off the accelerator

If you are driving a 30-foot vehicle at 55 mph, you should leave at least _____ between you and the vehicle ahead

4 seconds

If you are being tailgated, you should:

• avoid quick changes

• avoid trucks like turning on your taillights or flashing your brake lights

• increase your following distance

• all of the above

all of the above

Which of these is a possible consequence of forcing an automatic transmission into a lower gear at high speed?

loss of all engine braking effect

When the temperature is below freezing, which of the following areas may be slippery:

• bridges

• wet roads

• shaded areas

• all of the above

All of the above

When checking the condition of the visible parts during your pre-trip inspection, make sure that the _____ are secured against rubbing, snagging or wearing

air lines and electrical wiring

Drivers should use their horn when needed, however they must be aware that using the horn:

can startle other drivers

If you are driving a 30 foot vehicle at 35 mph, you should leave at least _____ between your vehicle and the vehicle in front of you

3 seconds

You should always be looking for hazards to have time to plan a way out of any emergency. This is part of being a:

defensive driver

If you are feeling drowsy, before driving you should:

get some sleep

Axle weight is:

the weight transmitted to the ground by one axle or one set of axles

Which of the following can cause front-wheel skid?

• lack of tread on the front tires

• driving too fast for conditions

• cargo loaded so not enough weight is on the front axle

• all of the above

All of the above

The first thing to do at an accident scene is to:

keep another accident from happening in the same spot

On engine start, you should:

make sure the oil pressure gauge is working

A bridge formula permits less maximum axle weight for axles that:

are closer together

HAZMET placards are:

warning signs

Which of the following vehicles is most likely to turn over

• triple trailer

• 5 axle tractor semitrailer

• 3 axle tractor semitrailer

• 65 ft. conventional double

triple trailer

Tar in the road pavement:

frequently rises to the surface in very hot weather

Which of the following statements about alcohol is true:

• taking a cold shower will help you sober up

• most people can drink 2 beers without affecting their driving ability

• drinking black coffee will help you sober up

• time is the only method that works to sober up

time is the only method that works to sober you up

Air tanks drains:

are used to remove water and oil from the air tanks

When crossing railroad tracks, you should:

stay in your lane