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The tanker endorsement applies to drivers who wish to drive a tank in Class A, B, or C CDL. To add this endorsement to your CLP/CDL, you must pass a knowledge test on the problems posed by large volume liquid cargos. The Iowa CDL tank vehicles test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The IA tanker test covers the following sections of the Iowa CDL Manual: Driving Safely, Combination Vehicles, Tank Vehicles, Hazardous Materials. Take this IA tanker practice test now to prepare for the actual test!
1. Engine oil pressure should come up to normal within _________ after the engine is started.
two minutes
five minutes
2. If you are carrying a heavy load that is slowing you down, you should:
drive in the left lane.
drive on the shoulder.
drive in the right lane.
3. Hazardous materials should be loaded:
away from heat sources.
even if some packages are leaking.
near heat sources.
4. To warn drivers behind you when you see you'll need to slow down, you should:
flash the brake lights.
use your headlights.
sound your horn.
5. When you need to brake, you should warn the drivers behind:
by flashing your brake lights.
by changing lanes.
by making gestures.
6. For safety during a trip, you should:
watch gauges for signs of trouble.
check critical items when you stop.
All of the above.
7. It may not be safe to operate at legal maximum weights:
on two-way streets.
during bad weather or in mountains.
in hot weather.
8. Shippers must warn drivers and others about the material's hazards:
by making a written report each day on the condition of the material.
by placing a red triangle with an orange center on the vehicle.
by putting hazard warning labels on packages.
9. Baffled liquid tanks have:
separate tanks inside the trailer.
bulkheads in them with holes that let the liquid flow through.
hollow balls floating in the liquid to slow movement.
10. Texting while operating a commercial motor vehicle is:
acceptable if you are contacting your supervisor.
acceptable if you are contacting your dispacther.
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IA Tanker CDL Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
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