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Connecticut CDL DMV Knowledge Test Class B 1

Take 4 practice tests for CDL is the best way to prepare for your Connecticut DMV exam is by taking our free practice tests. The following question are from real Connecticut DMV practice test. More than 95% people pass a DMV exam when practice at DMV Practice Test.

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1. A driver can rely on front wheel braking to work:
On dry roadways only.
Under all conditions.
Under all conditions, except for snow.

Front wheel braking is effective under all road conditions. It is unlikely that you will experience a front wheel skid, even on ice.

2. To check the automatic transmission fluid level in some vehicles, you will have to:
Park your vehicle uphill.
Park your vehicle downhill.
Leave the vehicle running.

In some vehicles, it may be necessary to leave the engine running when checking the automatic transmission fluid level.

3. If an applicant does not receive an air brakes endorsement:
They cannot operate a vehicle with air brakes.
They can only operate a vehicle with air brakes in intrastate commerce.
They can only operate a vehicle with air brakes in interstate commerce.

If you wish to be licensed to drive a CMV with air brakes, you must pass the air brakes knowledge test and use a vehicle with air brakes for your skills test.

4. Air storage tanks:
Are not allowed on a vehicle.
Hold compressed air for the brakes.
Should be drained of excess air after every trip.

In an air brake system, the air storage tanks hold compressed air to be used by the brakes. The number and size of air tanks varies among vehicles.

5. If a driver begins to feel fatigued while driving, they should:
Continue driving.
Drink coffee.
Stop and rest.
Drive faster to finish the trip more quickly.

If you begin to feel drowsy while driving, the only safe response is to safely leave the road and get some sleep. Using artificial stimulants can be dangerous because they may cause extreme fatigue when they begin to wear off.

6. An encroachment is when:
A driver does not appear for their scheduled basic skills test.
A vehicle touches an exercise boundary line during the basic skills test.
A driver fails one section of the basic skills test.

An encroachment during the basic vehicle control skills test is when an exercise boundary line is touched or crossed by any portion of the applicant's vehicle. Every encroachment will be counted as an error.

7. When driving in fog, you should:
Use the windshield wipers.
Use the low beam headlights.
Use the high beam headlights.
Use the heater.

While it is best to entirely avoid driving in fog, you should turn on your low beam headlights if you must drive in foggy conditions. Using high beams is a bad idea because the lights will reflect off of the fog and back into your eyes, making the road and its surroundings even more difficult to see.

8. Friction in an S-cam brake is caused when the brake shoes and linings:
Press against the outside of the brake drum.
Press against the inside of the brake drum.
Push against each other.

Friction inside a brake drum is caused when the brake shoes and linings push against the inside of the drum. The friction in the drums will slow and stop the vehicle.

9. Black ice is:
Usually thick.
Usually thin.
Not a hazard when driving.

Black ice is a layer of ice that is thin and clear enough for the road to be visible through it. The surface will look like a wet road. Always be alert to black ice if the road looks wet when the temperature is below freezing.

10. Brake pads should:
Be covered with grease.
Be covered with oil.
Be covered with brake fluid.
Not have any oil or grease on them.

When inspecting your brakes, you should verify that the shoes and pads do not have any oil, grease, or brake fluid on them.

11. Of the following, which is the most slippery surface?
Ice that is dry
Ice that is wet
Wet pavement

Ice becomes wet when the weather is just warm enough to melt the ice slightly. Wet ice is much more slippery than ice that is not wet.

12. When using the controlled braking method in an emergency situation, you should:
Apply the brakes as hard as possible without locking the wheels.
Apply the brakes with about half of your usual force.
Apply the brakes so the wheels lock.
Apply the brakes with minimal pressure.

The controlled braking method for emergency stops involves applying the brakes as hard as you can without locking the wheels. Keep steering wheel movements small when braking in this way.

13. After an accident, flares should be used with caution because:
There may be spilled fuel on the ground that could ignite.
Other drivers may not see the flares.
Flares are expensive.
Other drivers may get confused about what is happening.

After an accident, spilled fuel and improper use of flares can result in a fire.

14. When pulled off on the side of the road:
A driver should keep the driver’s side door open.
A driver should turn on the emergency flashers.
The driver should wave their arms.

If you must stop on the side of the road, make sure to use your four-way emergency flashers. This is particularly important at night.

15. With your low beam headlights turned on, you should be able to see about ____ ahead of your vehicle.
15 feet
75 feet
100 feet
250 feet

Low beam headlights allow you to see about 250 feet ahead of your vehicle. When driving at night, adjust your speed so that you will be able to stop in the distance illuminated by your headlights.

16. In a dual air brake system, if one air system is very low on pressure:
None of the brakes will work at all.
Either the front or rear brakes will not be fully operable.
There is usually no noticeable effect.

In a dual air brake system, either the front or rear brakes will not be fully operable if one of the air systems gets too low on pressure. If the air pressure in either tank gets too low while you are driving, you should exit the road and park as soon as possible.

17. When preparing to enter traffic, you should do all of the following, except:
Wait for a large gap between vehicles.
Be prepared for your vehicle to accelerate slowly, especially if it is loaded.
Make sure you can completely cross traffic, if necessary, without interfering with traffic.
Assume other drivers will make room for your much larger vehicle.

When crossing or entering traffic, bear in mind the size of your vehicle and the distance it will need to accelerate. Wait for a gap in traffic that is large enough to accommodate your vehicle before you begin to accelerate. Remember that you will need more room to accelerate if your vehicle is heavily loaded. Before crossing a road, be sure that you can get all the way across without interfering with traffic.

18. When starting the engine as part of the pre-trip inspection, the driver should:
Listen for unusual noises.
Rev the engine.
Turn up the radio.
Turn on the heater.

Check your engine during the pre-trip inspection. After starting the engine, you should listen for unusual noises.

19. ABS allows you to:
Drive faster.
Brake harder.
Stay in control when stopping.

The function of an Anti-Lock Braking System (ABS) is to help prevent wheel lockup during hard braking. With ABS equipped on your vehicle, you should drive and brake in the same manner that you would without it.

20. Which of the following is not a good rule to follow when using turn signals?
Signal early.
Signal continuously.
Do not use your turn signal if you think others know what you plan to do.
Cancel your signal after the turn is completed.

To be certain that others are aware of your intentions, always signal whenever you plan to turn or change lanes. You should signal well in advance of a turn; signal continuously throughout the turn; and make sure to cancel the signal when you are finished turning.

21. In an engine compartment, loose belts will:
Not turn the water pump and/or fan properly, causing the engine to overheat.
Make the engine run more efficiently.
Make the fan run too much, causing the engine to run too coolly.
Last longer than tight belts.

Be sure to check the tightness of the belts in your engine compartment. Loose belts will not turn the water pump and/or fan properly, which can lead the engine overheating.

22. After the engine is started, warning lights and buzzers should all:
Stay on.
Flicker occasionally.
Turn off right away.
Turn off once the vehicle begins moving.

After the engine is started, the warning lights and buzzers should deactivate immediately. The charging circuit warning, oil, coolant, and Anti-Lock Braking System (ABS) lights should all turn off.

23. A burning tire should be:
Cooled with water.
Fanned with a blanket.
Cut up with an axe.
Covered with a tarp.

A burning tire should be cooled with water. A driver may need to use large quantities of water to properly cool the tire.

24. Which of the following is not a reason to use your mirrors?
You are changing lanes.
You are making a turn.
You are looking at fuel prices.

While regular mirror checks should be part of your normal driving routine, checking your mirrors is especially important when turning, changing lanes, merging, and performing tight maneuvers.

25. The driver of a commercial motor vehicle:
Can use any cell phone while driving.
Can only use a hands-free mobile phone while driving.
Can only use a cell phone on rural roads.
Can use a cell phone at night.

It is prohibited for CMV drivers to use hand-held mobile phones while driving.

26. Stopping distance can be affected by:
Engine oil.
Time of day.

Factors that can affect stopping distance include your vehicle's speed, its weight, and the traction provided by the road surface.

27. If your tractor is equipped with ABS but your trailer is not, the ABS:
Will not be effective.
Will still improve your steering control.
Will make jackknifing easier.
Will allow others to see when you brake.

In a tractor-trailer combination, if the tractor is equipped with an Anti-Lock Braking System (ABS) but the trailer is not, the ABS will still improve the driver's steering control. The driver should keep an eye on the trailer and let up on the brakes if the trailer begins to swing out.

28. The application pressure gauge:
Shows how much air pressure is being applied to the brakes.
Shows the temperature of air being used in the braking system.
Shows the pressure of the air coming from the compressor.
Shows the number of times the brakes have been used.

In an air brake system, the application pressure gauge shows how much air pressure is being applied to the brakes. Not all vehicles with an air brake system have this gauge.

29. When driving down a steep grade, your brakes may fade. What happens if brakes fade?
They become quieter.
They become less effective.
They work better than usual.
They work differently from front to back.

If you use your brakes too much when traveling on a steep downgrade, they may overheat and become less effective. To avoid causing your brakes to overheat on a steep hill, you should rely on engine braking.

30. An alcohol evaporator in an air brake system:
Makes the brakes work without squeaking.
Prevents ice from forming in the braking system.
Lubricates parts of the braking system.

Some air brake systems include an evaporator that introduces alcohol into the system. The alcohol can help prevent ice from forming within the system.

31. How long should it take for oil pressure to reach a normal level when starting a vehicle?
A few seconds
About a minute
About four minutes

After starting a vehicle's engine, the oil pressure should come up to a normal level within seconds. Do not operate a vehicle if it has oil pressure that is low, dropping, or fluctuating.

32. When driving under wet conditions, a lack of spray coming from the tires of other vehicles indicates that:
Ice has formed on the road.
The pavement is dry.
The spray is caught on the underside of the vehicle.

In wet conditions, a lack of spray coming from the tires of other vehicles indicates that ice has formed on the road. Be especially cautious when traveling under wet conditions in freezing weather.

33. The ____ tells a driver how much pressure is in the air tanks.
Application pressure gauge
Air compressor governor
Supply pressure gauge
Drum brake

A vehicle that is equipped with air brakes must also be equipped with a supply pressure gauge. This gauge tells the driver how much air pressure is in each of the vehicle's air tanks.

34. If a vehicle is carrying hazardous cargo, placards must be placed:
Only on the front of the vehicle.
On the front, rear, and sides of the vehicle.
Only on the driver’s side of the vehicle.

Placards must be placed on the front, the rear, and both sides of a vehicle carrying hazardous cargo. They must be readable from any direction.

35. Joggers who are wearing headsets:
Are usually aware of what is happening around them.
May not be aware of what is happening around them.
Can clearly hear sounds of traffic.
Usually don’t have music playing.

Be careful around pedestrians, joggers, and cyclists who are wearing headphones. They may not be able to clearly hear surrounding traffic and may not be aware that you are there.

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