CDL HW Test Updated 2024

CDL HW Test ( Updated 2024 ) Complete Questions & Answers (Solved) 100% Correct

• A commercial motor vehicle's (CMV's) engine controls are used for: * 10 points
• safely operate your vehicle.
• start up and shut down the vehicle's engine.
• warn you when pressures or temperatures reach a dangerous level.
• help you steer, accelerate, brake, and park your CMV.

Answer: start up and shut down the vehicle's engine

• If your truck has a(n) , you must first turn the engine key to the 'on' position

before engaging it. * 10 points

• starter button
• engine brake
• clutch button
• cruise control

Answer: starter button

• Which clutch position is required to start the engine or shift gears? * 10 points
• Engaged
• Free play
• Disengaged
• Clutch brake

Answer: Disengaged

• Which of the following is a yellow, diamond-shaped knob that allows you to activate the

parking brake? * 10 points

• Parking brake control valve
• Trailer air supply valve
• Foot brake control valve
• Trailer brake hand-control valve

Answer: Parking brake control valve

5. Secondary vehicle controls: * 10 points

• provide backup functionality to the primary controls.
• shut down the vehicle's engine in an emergency.
• assist you in a safely operating your vehicle.
• all of the above.

Answer: assist you in a safely operating your vehicle

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• If your CMV has a , the Federal Motor Carrier Safety Regulations (FMCSR)

say you must use it. * 10 points

• seat heater
• cruise control

• seat belt
• fog lamps

Answer: seat belt

• Which vehicle instrument measures the voltage in a vehicle's electrical system? *

10 points

• Voltmeter
• Exhaust pyrometer
• Ammeter
• Both A and C

Answer: Voltmeter

• What is a normal operating range for a CMV's oil pressure gauge? * 10 points
• 20-45 psi
• 30-50 psi
• 40-65 psi
• 50-70 psi

Answer: 30-50 psi

• Which of the following warning devices help you to know when exhaust temperatures are

abnormal? * 10 points

• Pyrometer warning light
• Coolant temperature warning light
• Differential warning light
• Both A and B

Answer: Pyrometer warning light

• Which of the following warning devices indicates there is inadequate pressure in the air

brake system? * 10 points

• Coolant level alarm
• Oil level alarm
• Low pressure warning alarm/light
• Oil pressure warning light

Answer: Low pressure warning alarm/light

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• In order to put a commercial motor vehicle on the road, you must first: * 10 points
• complete and sign a DVIR.
• ask a mechanic about the vehicle's condition.
• conduct a thorough pre-trip inspection.
• perform a short test drive to verify safe operation.

Answer: complete and sign a DVIR.

• Before you inspect the engine compartment and front axle components: * 10 points
• verify the parking brakes have been set.
• put the vehicle's keys in the ignition, depress the clutch, and start the

engine.

• remove the chocks from the wheels.
• close the hood.

Answer: verify the parking brakes have been set.

• What is the minimum tread depth for the steer-tire? * 10 points
• 2/32 inch
• 4/32 inch
• 6/32 inch
• 8/32 inch

Answer: . 4/32 inch

• What is the only circumstance you are not required to inspect your cargo and load

securing devices? * 10 points

• If your load is sealed and you have been ordered not to open it.
• If your vehicle is loaded in a way that makes cargo inspections impossible
• If your destination is less than 100-air miles from your home terminal
• Both A and B

Answer: Both A and B

• When is it appropriate to conduct a post-trip inspection? * 10 points
• Whenever it's most convenient, but before the start of your next day
• The same exact time every evening, regardless of where you are
• At the end of every work day
• Right before 12 midnight, when your next day begins on your driver's daily log

Answer: At the end of every work day

• What items should a post-trip inspection include? * 10 points
• Brakes, steering, and lighting
• Oil and tire pressure
• The same items as the pre-trip inspection except for things affected by heat 3 / 4

• Only items known to be defective.

Answer: The same items as the pre-trip inspection except for things affected by heat

• When do the regulations require drivers of property-carrying CMVs to complete and sign

a DVIR? * 10 points

• At the start of their work day for each vehicle they intend to operate during that shift
• Whenever a defect or deficiency is discovered or reported
• When a change of duty status is made, every three hours, or every 150 miles, whichever comes

first

• At the end of their work day for any vehicle or equipment they used during that shift

Answer: . Whenever a defect or deficiency is discovered or reported

• If the previous driver found defects and noted them on a DVIR, what must you do before

operating that vehicle again? * 10 points

• Ensure that any items listed defective/deficient that may affect the safe operation of the

vehicle were repaired.

• The original copy of the DVIR must be received at the carrier's home terminal.
• A Master Diesel Technician must personally certify the vehicle is safe for operation.
• All of the above.

Answer: Ensure that any items listed defective/deficient that may affect the safe operation of the vehicle were repaired.

• What is the very first step you should take when starting a tractor-trailer engine? *

10 points

• Depress the clutch
• Apply the parking brake
• Turn the ignition switch/key on
• Apply the service brakes

Answer: Apply the parking brake

• What is the appropriate cool down period for a tractor-trailer engine? * 10 points
• A cool down period is not necessary
• Between 30-60 minutes
• It depends on the weather (temperature and humidity)
• It varies based on engine type, nature of the trip, and cargo hauled

Answer: . It varies based on engine type, nature of the trip, and cargo hauled

• When setting your tractor-trailer in motion, how can you tell the friction point of your

clutch has been reached? * 10 points

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