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AF Commercial Driving Theory Practice Questions - Afghanistan Driving License Theory Test - Commercial & Heavy Vehicle Exam

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About this Exam

Prepare with the AF Commercial Driving Theory Practice Questions - Afghanistan Driving License Theory Test - Commercial & Heavy Vehicle Exam practice quiz. This question bank includes 100 questions covering commercial, truck, vehicle, heavy, and brake. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

Sample Questions

Question 1
What is the primary function of the air compressor in a heavy commercial vehicle's pneumatic brake system?
To pump compressed air into the storage reservoirs (air tanks) to supply the braking system
To cool the engine cylinders during heavy braking
To provide hydraulic fluid pressure to the clutch
To inflate the cabin air conditioning system
Question 2
At approximately what pressure does the air compressor governor typically cut out (stop pumping air into the tanks)?
Around 120 to 125 PSI (approximately 8.3 to 8.6 bar)
Around 40 to 50 PSI
Around 250 to 300 PSI
Around 10 to 15 PSI
Question 3
At what air pressure must the low air pressure warning device (buzzer or red light) activate in a commercial air brake vehicle?
Before air pressure drops below approximately 60 PSI (around 4.1 bar)
Only when air pressure reaches 0 PSI
At 100 PSI
Only when the vehicle comes to a complete halt
Question 4
Why must air brake storage tanks be drained daily of water and oil accumulation?
Water and oil sludge can freeze in cold weather, block valves, corrode components, and cause brake failure
To reduce vehicle total weight for fuel economy
To allow fresh fuel to enter the air brake lines
Draining tanks is only required once every 5 years during major overhauls
Question 5
What happens when air pressure in a heavy vehicle's pneumatic system drops completely to zero while driving?
The powerful mechanical spring parking brakes (maxi brakes) automatically engage and lock the rear wheels
The brakes release completely, leaving the vehicle to coast with no retardation
The service brakes continue to work normally from a reserve air supply
The engine shuts down automatically and the vehicle rolls to a halt

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Additional Information

AF Commercial Driving Theory Practice Questions - Afghanistan Driving License Theory Test - Commercial & Heavy Vehicle Exam

This practice set contains 100 questions from the matching question bank and focuses on commercial, truck, vehicle, heavy, and brake. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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Frequently Asked Questions

This quiz contains a total of 100 practice questions carefully selected to test your knowledge on this subject.
Yes, you will have exactly 0 minutes to complete the exam. A countdown timer will be visible once you start.
Yes, you can retake this practice test as many times as you need. The questions and options may be randomized on subsequent attempts to ensure comprehensive learning.

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