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Nevada CDL DMV Knowledge Test Class A 1

Take 6 practice tests for CDL is the best way to prepare for your Nevada DMV exam is by taking our free practice tests. The following question are from real Nevada DMV practice test. More than 95% people pass a DMV exam when practice at DMV Practice Test.

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1. Without engine oil:
A vehicle will get better gas mileage.
An engine can be destroyed quickly.
The ABS won’t work properly.

It is essential that a vehicle's engine have adequate oil pressure. An engine can be destroyed rapidly if it is run without oil.

2. How is the parking brake released?
By tapping on the brake pedal three times
By pushing in the brake control knob
By engaging the accelerator
By tapping the accelerator twice

In newer vehicles with air brakes, the parking brakes are controlled by a diamond-shaped yellow knob. Pull the knob out to activate the parking brakes and push it in to release them.

3. The two markings on a front brake limiting valve usually read:
"Normal" and "slippery."
"Low" and "high."
"Left" and "right."

Some vehicles with air brake systems manufactured before 1975 have a front brake limiting valve with "normal" and "slippery" settings.

4. Sending text messages while driving:
May be done if the messages are short.
Is encouraged.
Is permitted if you are asking a question of your employer.
Is not permitted.

Sending and reading text messages while driving is prohibited.

5. When taking the basic control skills test, drivers are:
Not permitted to stop and exit the vehicle to look at the vehicle’s position.
Encouraged not to exit the vehicle to look at the vehicle’s position.
Allowed to leave the vehicle, but only if the vehicle is placed in reverse.
Allowed to leave the vehicle, but only if the vehicle is placed in neutral and the parking brake is set.

During the basic vehicle control skills test, you must place the vehicle in neutral and set the parking brake before exiting the vehicle to check its position. You may check the position of the vehicle no more than twice, except during the straight line backing exercise, where you may look no more than once.

6. During a pre-trip inspection, belts should be:
Left alone and not inspected.
Checked for tightness.
Inspected, but only about once a month.

When inspecting your vehicle, you should check all belts for tightness and excessive wear.

7. When asked to complete an offset back/left parking maneuver, you should:
Pull straight forward, then back to the right.
Pull straight forward, then back to the left.
Pull forward to the right, then back in a straight line.
Pull forward to the left, then back in a straight line.

If you are asked to complete an offset back/left parking maneuver, you should first pull straight forward, then back up to the left. Your vehicle must be parked completely within the boundaries of the parking space.

8. What is sleep debt?
When you fall behind on sleep
When you want to take a nap
Excess sleep
The amount of time it takes to get ready to drive after sleeping

You can build up a "debt" of sleep if you do not sleep for adequate amounts of time. You can only catch up on the time that you "owe" by getting more sleep.

9. A hand valve can be used to:
Add fuel to a vehicle.
Prevent a truck from rolling backwards when starting from a stop.
Check the oil.
Load cargo.

If a tractor-trailer is equipped with a trailer brake hand valve, the hand valve can be applied to keep the vehicle from rolling backwards when the vehicle is started from a stop.

10. A modulating control valve can control the:
Spring brakes.
Landing gear.
Air brakes.
Anti-lock braking system (ABS).

A modulating control valve allows a driver to gradually apply spring brakes. In equipped vehicles, the valve is controlled by a lever located on the dashboard.

11. Overloading a vehicle with cargo:
Usually has no effect on the vehicle.
Can impact the vehicle's steering and brake control.
Can impact the vehicle's electrical system.

Overloading a vehicle can have negative effects on steering, braking, and speed control. Learn to recognize when cargo is overloaded or poorly balanced.

12. When you need to stop in an emergency, you should:
Lock the wheels and skid to a stop.
Stop in a way that keeps your vehicle in a straight line.
Stop in a way that turns your vehicle.
Expect your vehicle to slow down more quickly than usual.

If you need to make an emergency stop, you can use either the controlled braking method or the stab braking method. It's important to brake in a way that keeps your vehicle traveling in a straight line while still allowing you to turn, if necessary.

13. While driving, you should:
Develop plans to get out of any dangerous situation that could arise.
Enjoy the scenery.
Never look at the mirrors.
Focus on your own driving and not worry about other drivers.

While driving, you should consistently check the road ahead for hazards. Develop a plan to deal with any hazards that could arise.

14. If a vehicle is equipped with power steering, the hoses should be checked:
For leaks.
To ensure that they are still clear.
To ensure that they are connected to the battery.
To ensure that they contain the proper amount of play.

When inspecting a vehicle with power steering, you should inspect the hoses, pumps, and fluid levels. Specifically check the hoses for leaks.

15. A Class 1 hazardous material is:
An explosive.

Explosives are placed in hazardous materials Class 1.

16. If you are being tailgated, you should:
Drive on the shoulder.
Pull off the roadway.
Drive faster.
Allow the vehicle to pass.

If you are being tailgated, it is best to allow more room to open up in front of your vehicle. This will help you avoid the need for sudden stops, which could result in the tailgater rear-ending you, and will make it easier for the tailgater to pass. Speeding up may only make things more dangerous by prompting the other driver to continue tailgating you at a higher speed.

17. When steering to avoid a crash, you should:
Only use one hand to steer.
Keep both hands on the steering wheel.
Not use your mirrors to check other lanes.
Speed up as you get nearer to the hazard.

When turning quickly to avoid colliding with a hazard in the roadway, you should always keep both hands on the steering wheel. You must have a firm grip on the wheel to be able to turn quickly.

18. To warn drivers behind you that you will be slowing down, you should:
Turn on the right turn signal followed by the left turn signal.
Tap your brake pedal a few times to illuminate your brake lights.
Swerve from side to side to get their attention.

To let drivers behind you know that you plan to slow down, lightly tap your brake pedal a few times to flash your brake lights. It is important to communicate your intentions to other drivers.

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

To operate in both excepted intrastate commerce and non-excepted intrastate commerce, you must choose a non-excepted intrastate commerce license.

20. When asked to make a turn while taking your driving test, you should:
Use your turn signal, but only if other cars are present.
Check traffic only in the direction of the turn.
Check traffic in all directions.

When asked to make a turn during the on-road driving test, you must check traffic in all directions and use your turn signal.

21. Manual air tank drains should be:
Opened to drain the tanks after each day.
Left open while driving.
Sealed with glue.

Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Manually operated air tank drains must be opened daily to remove this build-up.

22. When it’s difficult to see, such as at dawn or dusk, a driver can increase their vehicle's visibility by:
Driving while using their lights.
Driving with their windows open.
Flashing their lights periodically.

When driving at dawn, at dusk, or in inclement weather, you should use your headlights on their low beam setting to increase your visibility.

23. What should you do when confronted with an aggressive driver?
Make eye contact.
Try to stay in the other driver’s way.
Ignore their gestures.
Have a conversation.

If confronted by an aggressive driver, the most important thing for you to do is get out of their way. Avoid making eye contact, do not challenge them by increasing your speed, and do not let yourself be provoked by any angry gestures they direct toward you.

24. An Anti-Lock Braking System (ABS):
Is not available for most trucks.
Is not helpful in most situations.
Is required on newer trucks.

Beginning between 1997 and 1999, most commercial vehicles, trailers, and dollies are required to be equipped with ABS.

25. Which of the following is acceptable if found during a pre-trip inspection?
Tires of mismatched sizes
Tread of 3/32 of an inch in the grooves of the front tires
Tires manufactured by different makers

When checking the tires as part of a pre-trip inspection, make sure the tires have sufficient tread. There should be at least 4/32 of an inch of tread in every major groove of the front tires, and at least 2/32 of an inch of tread depth on the other tires. Tire sizes should not be mismatched.

26. If the coolant temperature gauge goes above the highest safe temperature, you should:
Continue to drive.
Pull over and figure out what's wrong.
Run the air conditioner.

If the coolant temperature gauge goes above the highest safe temperature, you should stop driving as soon as possible and try to figure out what is wrong. There could be an issue in your vehicle that could lead to engine failure and possibly a fire.

27. The emergency brake system uses:
Only parts of the parking brake system.
Only parts of the service brake system.
Parts of both the parking and service brake systems.
Only parts unique to the emergency brake system.

In an air brake system, there are three different braking systems: a service brake system, a parking brake system, and an emergency brake system. The emergency brake system uses parts of both the parking and service brake systems.

28. When driving in the winter, which of the following should receive extra attention in a pre-trip inspection?
Coolant and antifreeze levels
The air conditioning unit
Oil levels
The air filter

When driving during the winter, it is especially important to make sure the coolant and antifreeze are at safe levels.

29. If involved in an accident, which of the following is not recommended?
Trying to move your vehicle to the side of the road
Caring for the injured
Driving away from the scene

When involved in an accident, you should protect the area, notify authorities, care for the injured, collect required information, and report the accident. You can lose your license for leaving the scene of an accident.

30. A Class 1 hazardous material is:
An explosive.

The first hazardous materials class includes explosives such as ammunition, dynamite, and fireworks.

31. When driving in fog, you should:
Use the windshield wipers.
Use low beam headlights.
Use high beam headlights.
Use the air conditioning.

If you must drive in fog, you should use your low beam headlights and fog lights, even during the daytime.

32. Mirrors should be used:
Only when there may be an emergency.
By a helper to monitor your blind spots.

When driving, you should frequently check the mirrors on both sides of your vehicle.

33. When inspecting the exhaust system for defects, which of the following should be fixed?
Missing mounting brackets or clamps
A broken exhaust pipe, muffler, or tailpipe
Leaking exhaust system parts
All of the above

Exhaust system defects can be extremely serious because they may make it possible for poisonous fumes to enter into the cab or sleeper berth. Issues to check for in a pre-trip inspection include loose, broken, or missing exhaust pipes, mufflers, tailpipes, vertical stacks, mounting brackets, clamps, bolts, or nuts; exhaust system parts that are rubbing against fuel system parts, tires, or other moving parts of the vehicle; and exhaust system parts that are leaking.

34. How should you brake if your vehicle's ABS is not working?
Brake normally, as you will still have functioning brakes.
Pump the brake repeatedly.
Press the brake pedal down as hard as you can.

Without a working Anti-Lock Braking System (ABS), your vehicle will still have normal brake function. Continue to drive and brake as you normally would and have your ABS serviced as soon as possible.

35. When driving a vehicle, rough acceleration is:
Encouraged at slow speeds.
Encouraged at all speeds.
Discouraged at all speeds.

When accelerating, speed up smoothly and gradually so your vehicle does not jerk. Rough acceleration can cause mechanical damage.

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