AND CORRECT ANSWERS
Basement - CORRECT ANSWER A story partly below the grade plane and having less
than one-half its
Clear height (measured from finished floor to finished ceiling) below the grade plane.
Boiling point - CORRECT ANSWER The temperature at which the vapor pressure of a
liquid equals the
Atmospheric pressure of 14.7 pounds per square inch (psia) or 760 mm of mercury.
Where a boiling point is unavailable for the material in question or for mixtures which
Do not have a constant boiling point, for the purposes of this classification, the 20-
Percent evaporated point of a distillation performed in accordance with ASTM D 86
Shall be used as the boiling point of the liquid.
Chemical - CORRECT ANSWER An element, chemical compound or mixture of
elements or compounds or
Both.
Chemical name - CORRECT ANSWER The scientific designation of a chemical in
accordance with the
Nomenclature system developed by the International Union of Pure and Applied
Chemistry (IUPAC), the Chemical Abstracts Service rules of nomenclature, or a name
That will clearly identify a chemical for the purpose of conducting an evaluation.
Closed container - CORRECT ANSWER A container sealed by means of a lid or other
device capable of
Preventing the escape of liquid, vapor or dusts in the ordinary course of storage,
Handling or use.
,Combustible liquid - CORRECT ANSWER Any liquid that has a closed-cup flash
point at or above
100°F, as determined by the standard test procedures.
Container - CORRECT ANSWER For solid and liquid hazardous materials, a vessel of
60 gallons or less
In capacity used for storage or transportation. For compressed gases, a container,
Pressure vessel or tank designed for pressures greater than one atmosphere at 68°F.
Pipes, piping systems, engines and engine fuel tanks associated with solid or liquid
Hazardous materials or compressed gases, shall not be deemed to be containers if in
Active use.
Corrosive materials - CORRECT ANSWER A liquid, solid, or gas that causes
permanent injury ("full
Thickness destruction") to human skin at a rate specified by the Department of
Transportation (DOT) regulations. Or a liquid that can corrode ¼ inch of steel or
Aluminum within the course of a year.
Design pressure - CORRECT ANSWER The maximum gauge pressure that a pressure
vessel, device,
Component or system is designed to withstand safely under the temperature and
Conditions of use.
Dispensing - CORRECT ANSWER The pouring or transferring by other means of any
material from a
Container, tank or similar vessel, which would release dusts, fumes, mists, vapors or
Gases to the atmosphere, unless such release is prevented by a device, equipment or
System designed for that purpose.
, Excess flow control - CORRECT ANSWER A fail-safe system or other approved
device, equipment or
System designed to shut off flow caused by a rupture in a pressurized piping system.
Exhausted enclosure - CORRECT ANSWER A device, typically consisting of a hood
equipped with a
Fan that serves to capture and exhaust fumes, mist, vapors and gases generated at a
Workstation or other local environment. An exhausted enclosure does not include a
Room provided with general ventilation.
Explosion - CORRECT ANSWER An effect produced by the sudden violent expansion
of gases, whether or
Not accompanied by a shock wave or disruption, of enclosing materials, including the
Effects of the following sources of explosion:
1. Chemical changes such as rapid oxidation, deflagration or detonation,
Decomposition of molecules and runaway polymerization (usually
Detonations).
2. Physical changes such as pressure tank ruptures.
3. Atomic changes (nuclear fission or fusion).
Face velocity - CORRECT ANSWER The rate of flow or velocity of air moving into
the chemical fume
Hood entrance or face, as measured at the plane of the chemical fume hood face.
Fire separation - CORRECT ANSWER A horizontal or vertical fire resistance-rated
assembly of
Materials that have protected openings and are designed to restrict the spread of fire.
Flammable gas - CORRECT ANSWER Any substance that exists in the gaseous state
at normal