Question 1
At what air pressure should the low air pressure warning buzzer or light activate in a heavy vehicle equipped with air brakes?
Correct Answer:
Around 55 to 60 psi
Question 2
Why must the air brake reservoir tanks on a heavy commercial lorry be drained daily by the driver?
Correct Answer:
To remove water and oil that can freeze or corrode the brake system
Question 3
What is the primary safety function of a dual air brake system in a heavy passenger bus?
Correct Answer:
To provide separate front and rear brake circuits in case of a system leak
Question 4
Under Sri Lankan Motor Traffic Regulations, what is the default maximum height allowed for a heavy lorry or bus, including its load?
Correct Answer:
3.8 meters
Question 5
What is the normal operating air pressure range for a heavy vehicle's air brake system?
Correct Answer:
85 to 120 psi
Question 1
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About this Exam

Prepare with the LK DMT Heavy Vehicle Written Practice Questions - Sri Lanka Department of Motor Traffic Heavy Vehicle Written Test Exam practice quiz. This question bank includes 100 questions covering sign, indicates, road, heavy, and white. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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LK DMT Heavy Vehicle Written Practice Questions - Sri Lanka Department of Motor Traffic Heavy Vehicle Written Test Exam

This practice set contains 100 questions from the matching question bank and focuses on sign, indicates, road, heavy, and white. 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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