Iowa DMV CDL HazMat Quick Practice Test

Iowa DMV CDL HazMat Quick Practice Test For 2026

CDL Class A, B or C. Complete CDL driver training course. All the questions in this test are from the official DMV written exam. You can use our free online tests to evaluate how likely you are to pass the official DMV test. Or you can just cut to the chase and increase your chances of passing by upgrading to Premium Membership and unlock official DMV tests. In addition, you will also receive a master cheat sheet which contains all your state’s DMV questions and answers. Premium membership also unlocks a smart tracker which keeps an inventory of all incorrectly answered questions for easy, fast and effective revision. Practice with our free tests or hit Upgrade button below for premium access and increase your chances of passing your DMV written exam.

99.5% Pass Rate

Get Access To Official DMV Online Tests & A Master Cheat Sheet With All Questions & Answers For Your State. 99.5% Pass Rate Guaranteed!

Upgrade To Premium

Quick Facts:

Number of Questions – 20

Passing Percentage – 80%

Test Type – Free Test

1. Unless it is clearly unsafe, what does a driver need to accept a package?

The shipper’s certification
A notarized statement
A verbal agreement
A contract

2. To ensure you do not interfere with traffic while driving a heavy vehicle, you should:

Switch gears while driving uphill.
Try to pass other vehicles while driving uphill.
Stay in the right lane.
Ride the brakes while driving downhill.

3. What should be used to check for proper tire inflation?

A tire gauge
A tire iron
An air compressor
A lug nut

4. When inspecting the engine compartment, you should not:

Check the engine oil level.
Check the coolant level in the radiator.
Drain the brake fluid.
Check the windshield washer fluid level.

5. If confronted by an aggressive driver, you should:

Keep your vehicle in front of them.
Make eye contact with them
Ignore their gestures.

6. Who must provide emergency response information?

The shipper
The driver
The local fire department
The Department of Homeland Security

7. A placard indicating hazardous materials is shaped like a:

Diamond.
Triangle.
Circle.

8. What does a shipping paper describe?

The materials being transported
How the materials will be transported
Who should accept the materials being transported

Page 1 of 3