HazMat Chemistry Chapter 3

The process of reducing the built-up of static electricity of a cylinder containing a flammable gas refer to the practice of: a. Grounding b. Bonding c. Tapping d. Purging

a. Grounding

Who has regulatory authority over the features of cylinders in transport? a. DOT b. OSHA c. EPA d. CGA

a. DOT

What is the definition of autoignition point? a. The minimum temperature a confined vapor reaches in which self-contained combustion occurs even in the absence of an ignition source. b. The maximum temperature a confined vapor reaches in which self-contained combustion occurs even in the absence of an ignition source c. The minimum temperature at which the vapor off-gassing from a flammable liquid ignites if exposed to an ignition source. d. The temperature a substance reaches at which self-contain combustion occurs when exposed to an ignition source.

a. The minimum temperature a confined vapor reaches in which self-contained combustion occurs even in the absence of an ignition source.

NFPA defines a flammable liquid as a(n) a. flashpoint below 100°F b. flashpoint above 100°F c. approval from NFPA d. approval from OSHA

a. flashpoint below 100°F

A Class 1A liquid has a flashpoint of a. less than 73°F b. less than 100°F c. more than 100°F d. more than 200°F

a. less than 73°F

What is an example of a flammable compressed gas? a. Nitrogen b. Hydrogen c. Oxygen d. Argon

b. Hydrogen

A non-pressurized cargo tank constructed of a single-shell aluminum alloy with an oval cross-section with a typical capacity of 900 gallons define which type of cargo tank? a. MC-307 b. MC-306 c. MC-331 d. MC- 307

b. MC-306

What is the name given to a closed container that is not intended for fixed installation and possesses a liquid capacity of 60 gallons (227 L) or more? a. Cryogenic sphere b. Portable tank c. Fixed tank d. High-pressure tank

b. Portable tank

What is the definition of flashpoint? a. Liquid gives off sufficient vapor so that contained combustion is maintained b. The minimum temperature at which a liquid gives off sufficient vapor to form an ignitable mixture with air across the surface of the liquid or within a test vessel c. A lean mixture d. Minimum temperature is attained, at which self-sustained combustion occurs even in the absence of an ignition source

b. The minimum temperature at which a liquid gives off sufficient vapor to form an ignitable mixture with air across the surface of the liquid or within a test vessel

Define fire point. a. A lean mixture b. The minimum temperature at which a liquid gives off sufficient vapor to form an ignitable mixture with air across the surface of the liquid or within a test vessel c. Liquid gives off sufficient vapor so that continued combustion is maintained d. Minimum temperature is attained, at which self-sustained combustion occurs even in the absence of an ignition source

c. Liquid gives off sufficient vapor so that continued combustion is maintained

A rupture disk installed in a gas cylinder is designed to: a. to prevent product from escaping a damaged cylinder b. melt always when exposed to nominal melting temperatures. c. burst a unique pressure, thereby releasing the cylinder's product d. All of the above

c. burst a unique pressure, thereby releasing the cylinder's product

A class IIB combustible liquid has a flashpoint of a. less than 73°F. b. more than 100°F but less than 140°F. c. more than 200°F d. less than 100°F

c. more than 200°F

Upper flammable range refer to the a. range of vapor having a concentration less than a known percentage by volume in air that will not burn . b. minimum concentration or percentage by volume in air that the substance will burn. c. range of vapor having a concentration greater than a known percentage by volume in air that will not burn. d. rich mixture

c. range of vapor having a concentration greater than a known percentage by volume in air that will not burn.

Flammable or explosive range refer to a. autogenous ignition. b. flash point c. fire point d. Minimum and maximum vapor to air concentrations below and above which a flammable liquid does not burn

d. Minimum and maximum vapor to air concentrations below and above which a flammable liquid does not burn

How should you approach an "emptied" tank? a. Feel free to cut it b. With limited PPE or fire suppression available; after all, it's empty. c. As if no hazards exists d. Treat it like a potential flammable or toxic source.

d. Treat it like a potential flammable or toxic source.