CDL Tanker Practice Test 2

Question 1

What is the main hazard of driving a liquid tanker that is only partially filled?

Accepted Answer

Liquid surge that can shove the truck

Answer

A partially filled tank allows the liquid to surge back and forth, which can push the vehicle in the direction the wave moves.

Question 2

Why do tank vehicles have a high center of gravity?

Accepted Answer

Much of the weight is carried high off the road

Answer

Liquid loads sit high in the tank, raising the center of gravity and increasing rollover risk.

Question 3

When should you take a curve in a tanker?

Accepted Answer

Well below the posted speed

Answer

Because of the high center of gravity and liquid surge, you should slow well below posted curve speeds.

Question 4

What does 'outage' refer to when loading a tanker?

Accepted Answer

Empty space left for liquid expansion

Answer

Outage is the room left in a tank so liquid can expand as temperature rises without overpressuring the tank.

Question 5

Baffled tanks have bulkheads that control which type of liquid movement?

Accepted Answer

Forward-and-back surge

Answer

Baffles reduce forward-and-back surge but do little to control side-to-side movement.

CDL Practice Test