1. Portable fire extinguishers are classified according to the:

A. Place where they were manufactured.

B. Amount of time they have been in service.

C. Certification level required to operate them.

D. Type of fire they are designed to extinguish.

2. A portable fire extinguisher must be labeled with the:

A. Colors that designate its class rating.

B. Name of the purchasing department.

C. Type of PPE required to be worn while operating.

D. Letters and/or symbols that designate its class rating.

3. How would a fire containing plastics be classified?

A. Class A

B. Class C

C. Class D

D. Class K

4. Class A portable fire extinguishers are rated from 1-A through 40-A based upon the amount of water and:

A. The weight and height of the portable extinguisher.

B. Whether the portable extinguisher is certified for novice use.

C. Duration and range of discharge used in extinguishing test fires.

D. Whether the portable extinguisher is intended for indoor or outdoor use.

5. Which material is a Class B fuel?

A. Gasoline

B. Lithium

C. Vegetable oil

D. Live electrical wires

Portable fire extinguishers are classified by fire type and must be labeled with specific symbols. Class A fires include plastics, while Class B fuels encompass gasoline. Understanding these classifications ensures proper fire safety measures are followed.

Explanation:

Fire Extinguisher Classification and Use

Portable fire extinguishers are crucial safety devices that are classified according to the type of fire they are designed to extinguish. The correct answer to the first question is D, as extinguishers are categorized by the materials they can effectively combat.

For the second question, portable fire extinguishers must have labels that include letters and/or symbols that designate their class rating. Therefore, the answer is D.

Regarding the classification of fires involving plastics, such materials are classified as Class A, which includes common combustibles like wood, paper, and cloth. Thus, the answer here is A.

The effectiveness of Class A portable fire extinguishers is rated by their water equivalence, which is quantified through the duration and range of discharge during testing. Hence, the answer is C.

Finally, an example of a Class B fuel is gasoline, which is flammable and volatile, so the answer to that question is A.

Learn more about Fire Safety here:

https://brainly.com/question/44319347