Which of the 9 hazard classes may NOT be transported in a temperature-controlled trailer?
Answer: C
Classes 1, 2.1, and 3
Explosives (class 1), flammable gases (class 2.1), and flammable liquids (class 3) are all volatile substances that need to be transported without automatic temperature control.
Source: Arizona CDL Manual
All choices
- AClasses 2, 3, and 5.1
- BClasses 1, 3, and 5.2
- CClasses 1, 2.1, and 3
Why the other answers are wrong
A. Classes 2, 3, and 5.1
Classes 2, 3, and 5.1 include flammable gases and liquids, but class 5.1 (oxidizers) can be transported in temperature-controlled trailers.
B. Classes 1, 3, and 5.2
Class 5.2 (organic peroxides) may be temperature controlled, so including it as prohibited is incorrect.
Arizona CDL HAZMAT Test Info
Questions on Exam
30
Passing Score
80%
Time Limit
Typically 30 minutes; varies by testing location
Age Requirements
Intrastate: 18+ · Interstate: 21+
Arizona MVD
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More CDL HAZMAT Practice Questions
- Your vehicle contains explosives, oxidizer, or flammables. No one may smoke within ____ feet of the vehicle.
- It is recommended that a driver refrain from smoking or using an open flame within 25 feet of:
- A vehicle placarded for hazardous materials must have placards on ____ sides.
- What is the purpose of placards?
- Regarding placard table 2, at which weight limit are you required to use placards?