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New Hampshire CDL DMV Knowledge Test Class A 1

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

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1. What is a tire load?
The minimum safe weight a tire can carry
The maximum safe weight a tire can carry
The weight of a tire
The weight of the air within a fully inflated tire

Tire load is the maximum weight that a tire can safely carry at a specified pressure. This will be stated on the side of a tire.

2. When exiting your vehicle, you:
Must maintain four points of contact with the vehicle.
May turn to face the road before your exit is complete.
Must be facing away from the vehicle.
Must be facing the vehicle.

When exiting your vehicle during the basic vehicle control skills test, you must face the vehicle and maintain three points of contact at all times. If your testing vehicle is a bus, you must maintain contact with the handrail. Exiting the vehicle incorrectly may result in automatic failure of the basic control skills test.

3. If convicted of a traffic violation, you must inform your employer:
Within three hours.
Within a week.
Within 30 days.

If you are convicted of any kind of traffic violation in any type of vehicle, you must notify your employer within 30 days of the incident. You must also inform your motor vehicle licensing agency within 30 days if the incident happened in another jurisdiction. This rule does not apply to parking infractions.

4. When a vehicle is started, warning lights and buzzers:
Should stay on for several minutes.
Should turn off within a few seconds.
Should stay on until manually turned off.
Should not come on.

After an engine is started, the warning lights and buzzers for oil, coolant, charging circuits, and the Anti-Lock Braking System (ABS) should go out right away.

5. Applying the brake pedal causes air pressure to activate an electric switch and:
Turn off the brake lights.
Turn on the low pressure warning light.
Turn on the brake lights.
Turn off the low pressure warning light.

In a vehicle with air brakes, the brake lights are activated when the brake pedal is pushed and air pressure moves an electric switch. With the application of air pressure, the switch will then turn on the brake lights.

6. When driving with covered cargo, a cover that flaps:
Is acceptable.
Allows air to keep the cargo cool.
Can tear loose.
Can attract birds.

Cargo covers should not flap in the wind. They could tear loose, not only uncovering the cargo but also blocking the views of drivers.

7. With the exception of the straight line backing exercise, a driver may exit their vehicle and check its position during testing exercises up to:
One time.
Two times.
Three times.

A driver is allowed to exit their vehicle to check its position during any basic vehicle control skills test exercise. This action is called a "look." During the straight line backing exercise, a driver may not exceed one look. During any other exercise, a driver may not exceed two looks.

8. After traveling under an overpass during the driving skills test, you may be asked to recall:
The posted clearance.
The posted weight limit.
The width of the opening.
If there was a shoulder near the roadway.

If you drive under an overpass during the on-road driving skills test, your examiner may ask you to recall the posted clearance or height of the overpass.

9. The suspension system:
Holds up the vehicle and its load.
Keeps the load the proper distance behind the driver’s compartment.
Maintains a safe distance between the vehicle and other vehicles.
Lightens the load for the tires.

The suspension system holds up a vehicle and its load while keeping the axles in place. Faults in a vehicle's suspension system are extremely dangerous.

10. 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.

11. To determine if a vehicle can handle a load, you should:
Know the vehicle’s suspension rating.
Know the tire rating for the front tires only.
Start driving and see if the vehicle is handling well.

It is a driver's responsibility to make sure their vehicle is not overloaded. They must be aware of legal weight limits and the maximum weight that their vehicle is rated to carry, including the weight capacity rating of the suspension system.

12. When performing a pre-trip inspection, you should make sure that:
The pedal surface has been smoothed out.
The gas pedal sticks.
Nothing is obstrucing the pedals.
There is something underneath the brake pedal.

When checking your vehicle's pedals during a pre-trip inspection, you should ensure that there is nothing under or around the pedals that will obstruct their use. Make sure the pedals are in proper working condition and that the surfaces of the pedals are grooved, if applicable.

13. If driving so slowly that you could impede other drivers, you should:
Drive in the left lane.
Drive while using your four-way flashers.
Drive without using any lights.

If you must drive so slowly that you will impede the flow of traffic, you should turn on your four-way flashers to alert drivers behind you (as long as local laws allow the use of flashers).

14. When transporting cargo, drivers must check the securement of the cargo every:
10 miles.
150 miles.
500 miles.

The securement of cargo must be checked within the first 50 miles of a trip, and then again every three hours or 150 miles.

15. The most common type of foundation brake used is the:
S-cam drum brake.
C-cam drum brake.
G-cam disc brake.
P-cam disc brake.

The most common type of foundation brake is an s-cam drum brake.

16. After a tire has been changed, the driver should stop after a short distance to:
Check the tightness of the lug nuts.
Lower the tire's air pressure.
See if rocks have gotten into the tread.

After a tire has been changed, the driver should stop a short distance later to recheck the tightness of the tire's lug nuts.

17. A driver may have:
An automobile license from one state and a CDL from another.
Only one license.
Two licenses: one for automobiles and one for trucks.

A person may not have more than one license. Violation of this law may be punishable by jail time and/or a fine of up to $5,000.

18. How should you test the low pressure warning signal?
Engage and disable the parking brake.
Rapidly press and release the brake pedal.
Open the rear shut-off valves.
Uncouple and recouple all glad hands.

It is essential that your low pressure warning light functions properly. After allowing the system to charge, you can test the warning signal by rapidly applying and releasing the brake pedal. This will release air from the braking system and the warning signal should come on when pressure drops to a dangerous level.

19. What can happen if a parking brake is used in very wet weather when temperatures are below freezing?
The brakes will squeak.
The brakes may freeze so the vehicle cannot move.
The brakes may suddenly release by themselves.
The brakes may explode.

If you use the parking brakes when the weather is very wet and the temperature is below freezing, the brakes may become frozen, preventing the vehicle from moving.

20. What can happen if the exhaust system is not working properly?
Poisonous fumes may enter the cab.
Fumes may exit the rear of the muffler system.
Proper steering may be impossible.

Leaks in an exhaust system are extremely dangerous because they may allow toxic fumes into the cab or sleeper berth, endangering drivers and passengers.

21. If you remain in neutral for too long while switching gears:
The vehicle will speed up.
You may have trouble putting the vehicle into the next gear.
You may kill the engine.

If you remain in neutral for too long while switching gears, you may have difficulty putting the vehicle into the next gear. If this happens, do not try to force the gear shift. Instead, return to neutral, release the clutch, increase the engine speed to match the road speed, and try again.

22. What must be done if a load is over-length?
A warning flag must be placed on the end of the load.
The load may only be transported between 6 p.m. and 3 a.m.
The load must be shortened.
The emergency flashers must be activated.

Special equipment, such as warning flags or flashing lights, may be required if you are transporting an over-length load. When transporting such a a load, you will need to acquire the necessary permits. Driving is often limited to certain times.

23. What is axle weight?
The weight transmitted to the ground by one axle
The weight of one axle
How much weight an axle can hold

"Axle weight" refers to the weight transmitted to the ground by one axle or one set of axles.

24. If you don't know if there is enough space for your vehicle to pass under a bridge, you should:
Speed up.
Swerve back and forth.
Slow down.
Drive on the shoulder.

If you can't tell if your vehicle will have room to fit under a bridge or other overhead object, you should slow down and find an alternate route, if possible.

25. 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.

26. If your coolant level is found to be low, you should:
Drain the radiator.
Add more coolant.
Add engine oil.
Tighten the belts.

When inspecting the engine compartment, you should check the oil level, coolant level, and windshield washer fluid level, among other things. In both cold and hot weather, it is important that the engine have enough coolant.

27. On trucks and buses, where are ABS malfunction lamps located?
On the driver’s door
On the instrument panel
On the outside of the vehicle by the passenger’s door
Under the hood

Tractors, trucks, and buses with Anti-Lock Braking Systems (ABS) have yellow malfunction lamps located on their instrument panels. Trailers have yellow ABS malfunction lamps on their left side, either on the front or rear corner.

28. A vehicle inspection is required:
For insurance purposes.
To get fuel.
By state and federal law.

Federal and state laws require that CMV drivers inspect their vehicles before every trip.

29. After a tire has been changed, the driver should stop after a short distance to:
Check the tightness of the lug nuts.
Ensure that the tire has remained clean.
Inflate the new tire.

After changing a tire, you should stop a short distance later to recheck the tightness of the tire's lug nuts.

30. Once stopped as part of the stop/start maneuver, you should:
Apply the parking brake.
Keep the vehicle in first gear.
Be perpendicular to the curb.
Be blocking a driveway.

When parking as a part of the stop/start maneuver during the on-road driving skills test, you must apply the parking brake. The gears should be shifted into neutral or park. You must be parked parallel to the curb and should not be blocking any driveways or intersections.

31. The minimum tread depth of all major grooves on tires that are not on the front of a CMV should be a minimum of:
1/32 of an inch.
2/32 of an inch.
4/32 of an inch.
3/4 of an inch.

When inspecting your tires, verify that there is at least 4/32 of an inch of tread depth in every major groove on the front tires, and tread depth of at least 2/32 of an inch on the other tires. Tires on the same vehicle should all be the same size.

32. Braking mechanisms are located inside:
The fifth wheel.
A brake drum.
The landing gear.

Drum brakes are attached to the wheels and located on the axles of a vehicle. The braking mechanisms that cause the vehicle to stop can be found inside of a drum brake.

33. One way to prevent drowsiness while driving is to:
Drive alone.
Avoid regular exercise.
Get adequate sleep the night before the trip.

Driving while fatigued can be extremely dangerous. Strategies for preventing drowsiness while driving include getting a full night's sleep before a trip; having someone ride with you; scheduling trips for times during which you are normally awake; and avoiding medications that may cause drowsiness. Exercising regularly can increase your energy levels and make you less likely to become tired while driving.

34. Where must placards be placed?
Only on the front of a vehicle
On the front, back and both sides of a vehicle
Only on the driver’s side of a vehicle
Only on the passenger's side of the vehicle

If a vehicle is carrying hazardous materials that require placarding, there must be identical placards placed on the front, rear, and both sides of the vehicle.

35. When conducting a vehicle inspection, you will need to identify all of the following, except:
The power steering belt.
The water pump belt.
The alternator belt.
The water compressor belt.

During the vehicle inspection test, you must check the power steering belt, water pump belt, alternator belt, and air compressor belt for snugness, cracks, or frays. If any of these components are not belt-driven, you must tell the examiner which one(s), and verify that they are operating properly, mounted securely, and not damaged or leaking.

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