Class A Driver's License Practice Test -4 — Questions and Answers

Question 1: You will lose your CDL for at least _____ if you have committed three or more violations of an out-of-service order in a ten-year period.

One year.
120 days.
90 days.
3 years. (Correct answer)
2 years.

Correct answer: 3 years.

Commercial Driver's License (CDL) regulations specify strict penalties for violating out-of-service orders. Committing three or more such violations within a ten-year period results in a disqualification of your CDL for a minimum of three years. This rule emphasizes the importance of adhering to safety regulations to maintain driving privileges.

Question 2: During the "on-road test portion" of your on-road test, you will need to ________.

Drive safely in a variety of traffic conditions. (Correct answer)
To fix your vehicle's engine.
Demonstrate that your vehicle is safe to drive.
Move your vehicle forward, back and turn it within a defined area.

Correct answer: Drive safely in a variety of traffic conditions.

The "on-road test portion" of a CDL exam is designed to evaluate a driver's practical skills and ability to operate a commercial motor vehicle safely. This includes demonstrating proficiency in various traffic situations, such as merging, turning, lane changes, and navigating different road types. It assesses overall safe driving behavior under real-world conditions.

Question 3: When will you lose your CDL for life?

If you have committed a serious traffic violation.
If you use a CMV to commit a felony involving controlled substances or if you commit an alcohol-related offense for the second time. (Correct answer)
If you use a CMV to commit a felony involving controlled substances.
If you leave the scene of an accident involving a CMV for the first time.
If you commit an alcohol-related offense for the second time.

Correct answer: If you use a CMV to commit a felony involving controlled substances or if you commit an alcohol-related offense for the second time.

Federal regulations for Commercial Driver's Licenses (CDLs) impose severe penalties for specific offenses. A driver will lose their CDL for life if they use a Commercial Motor Vehicle (CMV) to commit a felony involving controlled substances, or if they commit a second alcohol-related offense while operating any vehicle. These actions are considered grave violations, leading to permanent disqualification.

Question 4: You will be denied or lose your hazardous materials endorsement, if you _______.

Have a conviction in military or civilian court for certain felonies.
Have been committed to a mental institution.
If you are under indictment for certain felonies.
All of the listed answers. (Correct answer)

Correct answer: All of the listed answers.

Obtaining and maintaining a hazardous materials (HazMat) endorsement requires meeting stringent security and safety criteria. You will be denied or lose this endorsement if you have a conviction in military or civilian court for certain felonies, have been committed to a mental institution, or are currently under indictment for specific felonies. These conditions are considered risks to public safety when transporting dangerous goods.

Question 5: A commercial motor vehicle (CMV) is defined as ______.

A vehicle transporting hazardous materials.
A vehicle transporting 16 or more passengers.
All of the listed answers. (Correct answer)
A vehicle with a gross weight rating over 26,001 lbs.

Correct answer: All of the listed answers.

A Commercial Motor Vehicle (CMV) is broadly defined by federal regulations to encompass vehicles based on several criteria. This includes vehicles transporting hazardous materials, those designed to transport 16 or more passengers (including the driver), and vehicles with a gross vehicle weight rating (GVWR) or gross combination weight rating (GCWR) over 26,001 lbs. Therefore, all the listed options contribute to the definition of a CMV.

Question 6: As you drive your commercial vehicle through long sections of road construction, you should remember to ________.

Accelerate only when you don't see people or other vehicles.
Watch your speedometer and maintain a slow pace. (Correct answer)
Drive as quickly through adverse road conditions as possible.
Watch your speedometer and maintain a fast pace.

Correct answer: Watch your speedometer and maintain a slow pace.

Driving through road construction zones requires extreme caution due to potential hazards like uneven surfaces, reduced lane widths, and the presence of workers and equipment. Maintaining a slow pace allows for better control of your commercial vehicle, increases your reaction time to unexpected changes, and ensures the safety of both yourself and construction personnel. Speeding through these areas is dangerous and often illegal.

Question 7: The key principle in balancing cargo for a journey is keeping the load _____.

To the rear.
Balanced. (Correct answer)
To the front.
To the left

Correct answer: Balanced.

The fundamental principle for safe cargo transportation is to keep the load balanced. An unbalanced load, whether too heavy at the front, rear, or to one side, can severely compromise the vehicle's stability, steering, and braking capabilities. Proper balance prevents dangerous weight shifts that could lead to loss of control, especially during turns or emergency maneuvers.

Question 8: If you are driving in freezing temperatures, which of the following is a quick and easy way to see if ice has formed on the road?

Drivers honking their horns at you.
A lack of spray from other vehicles. (Correct answer)
None of the listed answers.
Drivers having difficulty staying in the proper lane.

Correct answer: A lack of spray from other vehicles.

In freezing temperatures, a key indicator of ice on the road is the absence of tire spray from other vehicles. On wet roads, tires typically kick up water, creating visible spray. If you notice that other vehicles are not producing spray, even when the road appears wet, it strongly suggests that the moisture has frozen into a layer of ice, making the road extremely slippery.

Question 9: To test your vehicle's hydraulic brakes you should pump the brake pedal three times. Then apply firm pressure to the pedal and hold for five seconds. If the pedal moves this indicates _______.

There may be a problem but it doesn't need to be fixed immediately.
There may be a leak or other problem. (Correct answer)
You are a very good driver.
The hydraulic brakes are working.

Correct answer: There may be a leak or other problem.

When testing hydraulic brakes, applying firm pressure to the pedal for five seconds should result in the pedal holding its position. If the pedal moves or continues to sink during this test, it indicates a loss of pressure within the hydraulic system. This suggests a potential leak or another internal problem that requires immediate inspection and repair to ensure braking effectiveness.

Question 10: On the CDL pre-trip vehicle inspection test, you can expect to ________.

To answer general CDL questions.
To be asked to explain to the examiner what parts of your vehicle you would inspect and why. (Correct answer)
To park your school bus.
To explain why you want a commercial driver's license.

Correct answer: To be asked to explain to the examiner what parts of your vehicle you would inspect and why.

The CDL pre-trip vehicle inspection test assesses your knowledge of your commercial vehicle's components and their operational importance. You are expected to not only identify various parts but also explain to the examiner what you are checking for (e.g., damage, leaks, wear) and why these checks are crucial for the safe and legal operation of the vehicle. This demonstrates a comprehensive understanding of vehicle safety.

Question 11: Blocking is used in the __________ of a piece of cargo to keep it from sliding.

Front.
Back.
All of the listed answers. (Correct answer)
Sides.

Correct answer: All of the listed answers.

Blocking is a critical method for securing cargo by placing sturdy materials, such as wood, against the cargo to prevent movement. To effectively keep cargo from sliding, blocking must be applied to the front, back, and sides of the piece. This comprehensive approach ensures the cargo remains stable and secure against forces from acceleration, braking, and turns.

Question 12: Within the first ____ miles of your journey you should always check that your cargo is secure.

125
50 (Correct answer)
100
25

Correct answer: 50

It is a standard safety regulation and best practice for commercial drivers to stop and check their cargo securement within the first 50 miles of a journey. This initial check is crucial because cargo can settle and shift during the first part of the trip, potentially loosening tie-downs or blocking. Re-securing the load ensures it remains stable and safe for the remainder of the journey.

Question 13: Who is responsible for making sure the vehicle is not overloaded with cargo?

You, the driver. (Correct answer)
Your mom.
The shipper.
Your employer.

Correct answer: You, the driver.

As the driver of a commercial motor vehicle, you bear the ultimate responsibility for ensuring your vehicle is not overloaded with cargo. Overloading can lead to dangerous handling characteristics, increased stopping distances, excessive wear on vehicle components, and is a serious violation of federal and state regulations. It is your duty to verify the weight and proper distribution of the load before departing.

Question 14: There are two basic reasons for covering your cargo during transportation. One reason is to protect people from spilled cargo. What is the other?

None of the listed answers.
There is no other reason.
To protect the cargo from different or extreme weather conditions. (Correct answer)
To help your vehicle accelerate smoothly.

Correct answer: To protect the cargo from different or extreme weather conditions.

Covering cargo serves two essential purposes during transportation. Firstly, it protects other road users from spilled or falling cargo, preventing accidents and debris on the roadway. Secondly, it protects the cargo itself from adverse or extreme weather conditions, such as rain, snow, wind, or direct sunlight, which could damage or degrade the goods being transported.

Question 15: Why are false bulkheads sometimes necessary and typically beneficial for drivers transporting livestock?

Because livestock can move around in a trailer, causing unsafe handling, false bulkheads can keep the livestock bunched together and potentially prevent unnecessary movement and loss of control in your tractor or trailer. (Correct answer)
There is no reason to use bulkheads. It's actually quite dangerous for the animals.
False bulkheads are very useful for transporting livestock cargo. The bulkheads can separate the livestock's feces and urine from the inanimate cargo you are also carrying.
False bulkheads can help muffle the sound of livestock, helping you be more aware of more important road noises around you.

Correct answer: Because livestock can move around in a trailer, causing unsafe handling, false bulkheads can keep the livestock bunched together and potentially prevent unnecessary movement and loss of control in your tractor or trailer.

False bulkheads are beneficial for drivers transporting livestock because animals can move significantly within a trailer, causing dangerous weight shifts. By using false bulkheads, drivers can keep the livestock bunched together in smaller compartments, minimizing their movement. This helps maintain vehicle stability, prevents loss of control, and reduces stress on the animals during transit.

Question 16: Why should you never leave your vehicle unattended without chocking the wheels?

Because it's the law.
Because the vehicle might roll away and cause injury and damage. (Correct answer)
There is no reason.
Because the vehicle might cause injury and damage.

Correct answer: Because the vehicle might roll away and cause injury and damage.

Leaving a commercial vehicle unattended without chocking the wheels is extremely dangerous because the vehicle could roll away. This is especially true on inclines or if the air brake system leaks down over time, releasing the brakes. A runaway vehicle can cause severe injuries, extensive property damage, or even fatalities, making wheel chocks a critical safety measure.

Question 17: When stab braking if you re-apply the brakes before the wheels start rolling, __________.

The vehicle's air pressure will increase.
The brakes will break.
The vehicle will not stop moving.
The vehicle won't straighten out. (Correct answer)

Correct answer: The vehicle won't straighten out.

When performing stab braking, you apply the brakes fully until the wheels lock, then release them. If you re-apply the brakes before the wheels have a chance to start rolling again, you risk keeping the wheels locked. This prevents the vehicle from regaining traction and straightening out, which can lead to a skid, jackknife, or loss of directional control.

Question 18: If the ABS in your vehicle malfunctions, you need to remember __________.

You still have regular brakes.
To drive normally.
All of the listed answers. (Correct answer)
Get the ABS serviced as soon as possible.

Correct answer: All of the listed answers.

If your Anti-lock Braking System (ABS) malfunctions, it's important to remember several things. First, you still have regular braking capability, so you can drive normally but with increased caution. Second, because ABS is a critical safety feature designed to prevent wheel lock-up during braking, it is imperative to get the system serviced as soon as possible to restore full braking performance and safety.

Question 19: The air compressor governor allows the air start pumping again when it reaches the cut-in level or at approximately ______.

200 psi.
115 psi.
125 psi.
100 psi. (Correct answer)

Correct answer: 100 psi.

The air compressor governor regulates the air pressure in the air brake system. It is set to allow the air compressor to start pumping air into the tanks when the pressure drops to a 'cut-in' level, typically around 100 psi. The compressor then continues to pump until the pressure reaches the 'cut-out' level, usually around 125 psi, maintaining optimal operating pressure.

Question 20: Where is the braking mechanism located?

Inside the brake drum. (Correct answer)
To the left of the brake drum.
To the right of the brake drum.
On the outside of the brake drum.

Correct answer: Inside the brake drum.

In a drum brake system, the braking mechanism, which consists of the brake shoes and brake lining, is located inside the brake drum. When the brakes are applied, the shoes expand outwards and press against the inner surface of the rotating drum, creating friction that slows and stops the vehicle.

Question 21: What type of trailer can get stuck on raised crossings?

Car carrier
All of the listed answers. (Correct answer)
Lowboy
Possum-belly livestock trailer
Moving van

Correct answer: All of the listed answers.

Trailers with low ground clearance or long wheelbases are particularly susceptible to getting stuck or 'high-centered' on raised railroad crossings or other uneven terrain. This includes car carriers, lowboy trailers designed for heavy equipment, and possum-belly livestock trailers, all of which have designs that can cause them to scrape or get hung up on obstacles.

Question 22: The fifth wheel should be checked to see if _______.

The jaws are open.
There is damage or missing parts.
It is sufficiently greased.
All of the listed answers. (Correct answer)

Correct answer: All of the listed answers.

During a pre-trip inspection, the fifth wheel, which connects the tractor to the trailer, requires a thorough check. This includes verifying that the jaws are open and ready to couple, inspecting for any damage or missing parts that could compromise the connection, and ensuring it is sufficiently greased for smooth operation and to prevent excessive wear. All these checks are vital for safe coupling.

Question 23: At what psi will the tractor protection valve close?

80-95 psi.
60-85 psi.
20 to 45 psi. (Correct answer)
100-125 psi.
50-75 psi.

Correct answer: 20 to 45 psi.

The tractor protection valve is a safety component in air brake systems. It is designed to automatically close and prevent air loss from the tractor's air tanks if there's a major leak in the trailer's air lines. This valve typically closes when the air pressure in the service line drops to a critical range, usually between 20 to 45 psi, simultaneously applying the trailer's emergency brakes.

Question 24: Emergency lines are often coded what color?

Blue.
Red. (Correct answer)
Yellow.
Orange

Correct answer: Red.

In commercial vehicle air brake systems, emergency lines are consistently color-coded red. This standardized color coding allows drivers and mechanics to quickly identify the emergency air line, which controls the trailer's emergency (spring) brakes and supplies air to release them. The service line, in contrast, is typically blue.

Question 25: You have a major leak in the service line. You put on the brakes. Service air pressure will escape and thus causing _______.

All of brakes of the trailer to be ineffective.
The tractor spring brakes to malfunction.
The trailer emergency brakes to come on. (Correct answer)
None of the listed answers.

Correct answer: The trailer emergency brakes to come on.

If there is a major leak in the service line and you apply the brakes, the service air pressure will rapidly escape. When this pressure drops below the critical threshold (typically 20-45 psi), the tractor protection valve will close, and the trailer's emergency brakes (spring brakes) will automatically engage. This safety feature prevents the tractor from losing all its air pressure and ensures the trailer stops.

Question 26: What emergency equipment should your vehicle have?

All of the listed answers. (Correct answer)
Warning devices for parked vehicles.
Fire extinguisher.
Spare electrical fuses.

Correct answer: All of the listed answers.

Commercial vehicles are legally required to carry specific emergency equipment to ensure safety and compliance. This includes a fully charged fire extinguisher to combat potential fires, spare electrical fuses (unless the vehicle uses circuit breakers) for electrical repairs, and warning devices such as reflective triangles or flares to alert other motorists if the vehicle is stopped on the roadside.

Question 27: If your vehicle's landing gear is power-operated, you will need to check for ______.

None of the listed answers.
Oil on the ground.
Air or hydraulic leaks. (Correct answer)
Water.

Correct answer: Air or hydraulic leaks.

If a vehicle's landing gear is power-operated, it typically relies on either an air or hydraulic system for its function. During a pre-trip inspection, it is crucial to check for any signs of air or hydraulic leaks around the landing gear mechanism. Leaks indicate a potential malfunction that could prevent the landing gear from operating correctly or safely, compromising trailer stability.

Question 28: Which of the following engine compartment belts must you check for cracks or frays as part of your pre-trip inspection?

Water pump belt.
All of the listed answers. (Correct answer)
Power steering belt.
Alternator belt.
Air compressor belt.

Correct answer: All of the listed answers.

During a pre-trip inspection, all engine compartment belts are critical components that must be checked for cracks, frays, or excessive wear. This includes belts for the water pump, power steering, alternator, and air compressor. Any damage to these belts can lead to the failure of essential vehicle systems, potentially causing a breakdown or loss of control.

Question 29: All versions of the Class B Pre-trip inspection tests will include ________.

An engine start.
An engine start and in-cab inspection. (Correct answer)
An inspection of the emergency exit.
An examination of the student mirrors.

Correct answer: An engine start and in-cab inspection.

All versions of the Class B CDL pre-trip inspection test require the applicant to perform an engine start and a comprehensive in-cab inspection. This segment of the test evaluates the driver's ability to check critical gauges, warning lights, controls, mirrors, and safety equipment from the driver's seat, ensuring they can properly operate and monitor the vehicle's systems before driving.

Question 30: During your vehicle's inspection test as you check the oil pressure gauge, you should _______.

Make sure the oil temperature gauge decreases below the operating range.
Check if the pressure gauge shows increasing or normal oil pressure and/or if the warning light goes off. (Correct answer)
None of the listed answers.
Make sure the warning light blinks red.

Correct answer: Check if the pressure gauge shows increasing or normal oil pressure and/or if the warning light goes off.

During a vehicle inspection, checking the oil pressure gauge is crucial to ensure the engine's health. The correct indication is that the pressure gauge shows increasing or normal oil pressure, and any associated warning light should go off. This signifies that the engine's lubrication system is functioning correctly, providing adequate oil flow to prevent engine damage.

Class A Driver's License Practice Test -4

You will lose your CDL for at least _____ if you have committed three or more violations of an out-of-service order in a ten-year period.