Question 1

Quick action with the proper fire extinguisher is the key to control of burning LPG.

Accepted Answer

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Question 2

Label the axes in the diagram.

Accepted Answer

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Question 3

Which of the following is not considered a flammable liquid?

Accepted Answer

Acetone, gasoline, and carbon disulfide are all considered flammable liquids because they have a flash point below 100°F. Propane, on the other hand, is a flammable gas and is not classified as a flammable liquid.

Question 4

Automatic sprinkling systems are required in paint spray areas.

Accepted Answer

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Question 5

Combustible residues contribute to the largest proportion of spray booth fires.

Accepted Answer

Combustible residues, such as paint and solvent buildup, are a major cause of spray booth fires due to their flammable nature.

Question 6

The principal basis for classification of flammable liquids is:

Accepted Answer

The flashpoint of a liquid is the temperature at which it gives off enough vapor to ignite in the presence of an ignition source. This is the most important characteristic for safety reasons since it determines the hazard class of a flammable liquid, as well as its proper storage, handling, and use. Firepoint is the temperature at which the liquid continuously burns when ignited, and is not used for classification purposes. Volatility is a measure of how easily a liquid turns into a vapor, and is related to its evaporation rate, but does not directly indicate its flammability. Autoignition temperature is the temperature at which a liquid spontaneously ignites without a spark or flame, and is not used for classification purposes.

Question 7

Which of the following is used to extinguish LPG fires?

Accepted Answer

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Question 8

Pure propane has a characteristic odor.

Accepted Answer

Pure propane is actually odorless; an odorant, usually ethyl mercaptan, is added to it so that leaks can be detected by smell.

Question 9

Electrical wiring inside spray booths,subject to deposits of combustible residue,must be in rigid conduit or in boxes or fittings containing no taps,splices,or terminal connections.

Accepted Answer

Electrical wiring inside spray booths needs to be in rigid conduit or in boxes or fittings that don't have taps, splices, or terminal connections in order to reduce the risk of ignition due to deposits of combustible residue.

Question 10

If a sprinkler system is installed inside ventilation ducts for a spray area,sprinkler heads are needed on both sides of the filter system.

Accepted Answer

Sprinkler heads are needed on both sides of the filter system to ensure adequate coverage in case of a fire.

Question 11

LPG tanks are required to have "bleed off" valves for removing condensed moisture.

Accepted Answer

LPG tanks have pressure relief valves for safety to release excess pressure, not specifically for removing condensed moisture.

Question 12

The diagram plots

Accepted Answer

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...

Question 13

Label the temperatures (Fahrenheit)on the axes.

Accepted Answer

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Question 14

Spray residue accumulations are difficult to detect and thus do not lead to many OSHA citations.

Accepted Answer

Spray residue accumulations can pose serious health hazards if inhaled or ingested, and OSHA has specific regulations regarding their removal and cleaning. Failure to comply can result in citations and penalties.

Question 15

Injury from liquid propane while opening the tank valve implies that the valve is defective.

Accepted Answer

Injury from liquid propane can occur due to improper handling or misuse, such as not wearing protective gear or opening the valve too quickly, rather than the valve itself being defective.

Question 16

The most frequently used test for flashpoint is the

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Question 17

Electrical equipment of any kind is prohibited in a spray area if subject to deposits of combustible residues.

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Question 18

The "TAG closed tester" derives its name from

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Question 19

"Liquids" excluded by NFPA from the definition of "flammable liquid" are those which have a vapor pressure:

Accepted Answer

The NFPA excludes liquids with a vapor pressure of more than 40 pounds from the definition of "flammable liquid" because these substances vaporize too quickly at normal temperatures to be classified as flammable liquids under their criteria.

Question 20

Small portable spraying apparatus not used repeatedly in the same location is exempt from spray painting standards.

Accepted Answer

According to the Occupational Safety and Health Administration (OSHA), small portable spraying apparatus not used repeatedly in the same location are exempt from spray painting standards. However, all spray painting equipment must meet certain standards to ensure the safety of workers using the equipment.

Quiz 11: Flammable and Explosive Materials