CDL Tank Vehicles (N) Endorsement Test
Safe driving rules: practice questions
Our CDL Tank Vehicles bank has 31 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
A hazmat cargo tank starts leaking on the road. How far may you drive it?
- Back to the shipper to be refilled
- To the delivery address, as long as it is nearby on the route
- To the next truck stop on your route
- Only as far as needed to reach a safe place
Show the answer
D. Only as far as needed to reach a safe place — Never transport a leaking cargo tank farther than needed to reach a safe place (CDL Manual 9.7)
Question 2
How far ahead should you look while driving a tanker?
- 12 to 15 seconds
- 2 to 3 seconds
- 30 to 40 seconds
- 5 to 6 seconds
Show the answer
A. 12 to 15 seconds — Good drivers look at least 12 to 15 seconds ahead (CDL Manual 2.4.1)
Question 3
What do wet roads do to normal stopping distance?
- They cut it in half
- They don't change it
- They add about 10 feet
- They can double it
Show the answer
D. They can double it — Remember that wet roads double the normal stopping distance (CDL Manual 8.3.4, 2.6.2)
Question 4
What is the right way to take a curve in a tank vehicle?
- Slow down before the curve, then accelerate slightly through it
- Brake hard in the middle of the curve
- Speed up before the curve, then brake while in the curve
- Keep the same speed and coast through
Show the answer
A. Slow down before the curve, then accelerate slightly through it — Slow down before curves, then accelerate slightly through the curve (CDL Manual 8.3.3)
Question 5
At 55 mph, what is the minimum total stopping distance the manual gives in ideal conditions?
- About 120 feet
- About 250 feet
- About 1,000 feet
- About 419 feet
Show the answer
D. About 419 feet — At 55 mph your vehicle will travel a minimum of 419 feet before stopping (CDL Manual 2.6.1)