connecticut
CDL Practice Test

This site is available to practice and prepare to take the Connecticut CDL test. These tests are free and you are able to take tests as many times as you would like as you prepare to go to the DMV to take the CT CDL knowledge test. You will be presented with 40 questions and you must answer 32 questions correctly to pass. There is a 50-minute time limit. You may not go back once you answer a question. Click the "Start Test" button below to begin.

1 / 40

Where are shut-off valves located?

either at the front or the back of the trailer

at the front and back of the trailer

at the back of the trailer

at the front of the trailer

2 / 40

While completing the 3rd component of the air brake check of a combination vehicle, at what psi should the tracor protection valve and parking brake valve should pop out?

20 psi

40 psi

70 psi

They should never pop out

3 / 40

You should check your mirrors while making a lane change:

all answers listed

right after you start the lane change

after you have completed the lane change

after you signal your intent to change lanes

4 / 40

The school bus driver may be the only contact person from school system some parents meet. The percentage of such parents is as high as:

0.72

0.5

0.65

0.85

5 / 40

At what "cut out" level does the governor stop pumping air?

150 psi

100 psi

125 psi

75 psi

6 / 40

You should____when an emergency requires you to quickly stop due to a crash.

use stab or controlled braking

maintain pressure on the brake pedal

use the hand valve

use only the engine brakes

7 / 40

A tractor should not be backed under a trailer until the whole air system is:

is between 40 and 60 psi

is between 50 and 80 psi

at a normal pressure

is at half of the maximum pressure

8 / 40

You are driving a 40 foot truck at 35 MPH, how much space (in seconds) should you keep in front of you?

6 seconds

4 seconds

5 seconds

3 seconds

9 / 40

When accelerating:

always use the parking brake to slow down

"hammer down" when your wheels start to spin

speed up smoothly and gradually and avoid jerking

do not engage the clutch before you take your foot off the brake

10 / 40

Cargo tanks ____.

are bulk packagings permanently attached to a vehicle

are tanks that the military uses to transport hazardous materials

are large drums used to contain hazmat that is loaded on a trailer

are large drums temporarily attached to a vehicle

11 / 40

If there is rust around the nuts, what may it indicate?

They are loose.

They are fitted just right.

They need to be changed out.

There is a leak somewhere.

12 / 40

Suspension systems:

keep the load secure

keep the brake drums from failing

keep the axles in place

keep the steering wheel tight

13 / 40

You should____to check the free play of manual slack adjusters on S-Cam brakes.

drain off air pressure before adjusting after parking on level ground

chock the wheels and release the parking brakes after parking on a level ground

apply the parking brake after stopping on level ground

after parking on a slight grade, release the parking brake, activate the service brakes and check for vehicle movements

14 / 40

Which of the following statements about loading and unloading cargo tanks is false?

The person in attendance must be authorized and able to move the vehicle.

The person attending the tanker must have a clear view of it.

The person in attendance must be aware of the danger.

The person in attendance must be within 50 ft of the tanker.

15 / 40

The parking brakes should be used____in air brake vehicles.

only when parked on an incline

every time the vehicle is parked

only during post trip inspection

as rarely as possible

16 / 40

Vehicle handling can become unsafe if the weight is not properly balanced. Hard steering can be caused by:

too much weight on the steering axles

high center of gravity

under loaded front axles

too little weight on the driving axles

17 / 40

The interlock system for the brake and accelerator on a transit coach may be used:

To replace the parking brake.

To replace the rear door emergency buzzer.

As a safety feature when the exit door is open.

All of these answers are correct.

18 / 40

A placard is required for a combustible liquid at?

100 gallons

Any amount

110 gallons

1,001 pounds or more

19 / 40

When driving normally, some drivers use the hand valve before applying the brake pedal to prevent jack knifing. Select the most appropriate response to this statement.

it will result in less skidding than when just using the brake pedal alone

it should not be done

it is the best possible way to brake and maintain the truck in a straight path

should be used with caution and only if you are aware of the dangers

20 / 40

Select the true statement about stop valves in a cargo tank:

They will fall off in an emergency.

They protect the piping and tank during rear end collisions.

They are manually operated.

They will close in an emergency.

21 / 40

In column 1, the "D" symbol means:

Devices

Domestic transportation

Detonators

Domestic restrictions

22 / 40

What gauge on the dashboard indicates electrical system charging rate?

The ammeter/voltmeter

The power gauge

The air gauge

The coolant pressure gauge

23 / 40

Why are you required to take an exam about air brakes?

you cannot receive a CDL at all otherwise

all trucks have air brakes

you would have to get a CDL with a restriction otherwise

it is a federal requirement

24 / 40

Select the vehicle that off-tracks the most.

a 5-axle tractor that is towing a 45-foot long trailer

a 5-axle tractor that is towing a 32-foot long trailer

a 5-axle tractor that is towing a 40-foot long trailer

a 5-axle tractor that is towing a 52-foot long trailer

25 / 40

One reason hauling liquids in tank vehciles require special care is:

Because of strong winds.

Because of the extreme weight.

Because of the movement of the liquid.

Because of uneven expansion.

26 / 40

When backing, what is the best method to use to avoid blind spots?

use a helper

use mirrors on both sides

look at your path

back towards the driver's side, where you can see better

27 / 40

Which of the following statements about bus evacuation is true?

If time allows, backup to the stop before evacuating the bus.

If time allows, notify the dispatcher about evacuation location, conditions, and type of assistance needed.

If time allows, notify the police.

If time allows, walk through the bus and close all windows.

28 / 40

Always try to back toward the driver's side because

your truck will naturally pull toward the driver's side

you can see better, watching the vehicle rear out the side window

it's more comfortable for turning your neck

all of these answers are correct

29 / 40

Which trailer should be the first one after the tractor?

the trailer that is the shortest in length

the trailer that weighs the least

none of the answers listed

the trailer that weighs the most

30 / 40

Select the first action to do when the low air pressure warning comes on:

release the supply control valve

shift into a higher gear

come to a stop and safely park as soon as possible

adjust the engine brake

31 / 40

Select the true statement in regards to quick steering movements and double trailers:

you should apply a firm pressure to the brake pedal at the same moment you do quick steering movements

it is easier to tip doubles and triples from quick steering movements than other vehicles

nothing will occur

it is easier to countersteer doubles/triples than other vehicles

32 / 40

Select the true statement in regards to the liquid inside of a bulk tank causing a tank truck to roll sideways.

It can occur when driving through a curve.

All answers listed.

It can occur even when driving at the posted speed limit.

It can occur even with baffles inside that slow the flow.

33 / 40

In what position should the converter dolly air tank drain valves and pintle hook be in?

closed and open

open and latched

closed and latched

open and open

34 / 40

The _____of the kingpin has the locking jaw close around it.

apex

tip

dull section

shank

35 / 40

You do not have a hazardous materials endorsement on your commercial driver license. When can you legally haul hazardous materials?

Only in the event of a federally declared emergency situation.

Only when the vehicle does not require placards.

Never.

Only when the shipment does not cross state lines.

36 / 40

The main reason you should pull the dolly out from under a trailer before disconnecting it from the trailer in front is:

so the rear-trailer's air brake system will stay charged and keep the trailer wheels locked to prevent rolling

to provide additional lateral stabilization to the front trailer

it is possible that the dolly tow bar could fly up making it difficult to re-couple

removing the dolly before uncoupling is not the correct procedure

37 / 40

In safe driving, what does communicating mean?

all of these answers are correct

using a cb radio to let others know your intentions

using hand signals

letting others know you are there by using turn signals, four way flashers, and horn

38 / 40

It is good practice to_____when uncoupling.

have the glad hands coupled to the dummy couplers

make sure the electrical cable is hanging with the plug end down

have the glad hands coupled together

all answers are appropriate

39 / 40

Select the true statement in regards to your brake function when your ABS fails

you will need to pull over immediately

there is a huge fire risk

the abs will need to be repaired but the brakes will function normally

you will have no control over your truck as the brakes will not be functioning

40 / 40

Hazardous materials (that are not forbidden) carried on a bus must be:

All of these answers are correct

Stored in the passenger compartment

Carried in a metal box

Labeled

Your score is

The average score is 0%

4.5/5 - (2 votes)

CDL Category Practice Tests

CDL Practice Test

How To Get A connecticut Commercial Drivers License

Those looking to obtain a Connecticut CDL must have a valid operator’s license and the following requirements below. Applicants between the ages of 18 and 21 can apply for an intrastate CDL license. Only those who are 21 years of age or older may apply for an interstate CDL as well as Hazmat, Doubles/Triples, Passenger, and School Bus Endorsements. All CDL applicants must have a medical examiner’s certificate, or DOT physical card, to be eligible for a CDL. In addition, all applicants must complete a self-certification form which describes the types of vehicles that the applicant intends to drive with their commercial driver’s license.

Any applicants who have the following are disqualified from receiving their commercial driver’s license.

If you are subject from receiving CDL driving privileges in another state.
If you have an impaired driving conviction in a commercial vehicle in the past 24 months.

If your license is currently suspended, revoked, denied, or canceled.
If you have more than one driver’s license.

CDL applicants are required to complete at least one knowledge assessment and a skills test to ensure their proficient understanding and knowledge of the commercial driving laws in the state of Connecticut.

Endorsements
T – Double or Triple Trailers
P – Passenger / Transport
N – Liquid Bulk / Tank Cargo
H – Hazardous Materials
X – Hazardous Material and Tank Combined
S – School Bus
V – Student Transportation Vehicle
A – Activity Vehicle
F – Taxi, Service Bus, Livery, Motor Bus, Motor Coach

Hit the Open Road

connecticut CDL License Test Tips

All applicants are required to complete written knowledge tests to obtain their CDL. Those looking for a Class A CDL will need to complete a 70-question test. Those looking for Class B and C CDLs will need to complete a 50-question general knowledge test. Those seeking endorsements and removal of the Air Brake Restriction will be responsible for taking a knowledge test for each endorsement or removal sought. These tests range between 20 and 30 questions. All tests must be passed with a score of 80 percent or greater.All applicants must complete a skills test in accordance with the federal regulations. Each skills test is comprised of a pre-trip inspection, driving assessment, and basic control skills. All three parts must be passed in order for the applicant to receive their commercial driver’s license. Those seeking endorsements must take the skills test in the vehicle type their intended endorsement is for.

Additional Information

Information on the Connecticut Department of Motor Vehicles

The State of Connecticut Department of Motor Vehicles regulates the CDL requirements and testing in Connecticut. To get more information contact them via:

Website: https://portal.ct.gov/DMV/Licenses/Licenses/Commercial-Drivers/CDL---Main-Menu

Phone: 860.263.5700

Additional Connecticut CDL Helpful Links

Please use the links below to access more valuable Connecticut CDL testing resources and to learn more about practice driving tests for the state of Connecticut.

connecticut CDL Practice Test