QUESTIONS WITH DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS) /ALREADY GRADED A+
ABSOLUTE ZERO - ANSWER: Temperature at which all molecular motion, and
consequently all life, ceases to exist according to Einstein and the kinetic molecular
theory. Absolute zero has never been reached, but it has been approached by the
temperatures of some cryogenic gases.
BULK NITROUS OXIDE SYSTEM - ANSWER: A system comprised of stationary or
portable nitrous oxide storage containers, pressure regulators, safety devices,
vaporizers, manifolds, interconnecting piping and/or other devices or equipment.
Bulk Nitrous Oxide System has a storage capacity of more than 28,000 SCF of nitrous
oxide in liquid or gaseous state, including unconnected reserves in or at the same
building, structure or premises. Bulk nitrous oxide systems at industrial and
institutional consumer sites shall additionally comply with the requirements of CGA
G-8.1
BULK OXYGEN SYSTEM. - ANSWER: A system comprised of stationary or portable
oxygen storage containers, pressure regulators, safety devices, vaporizers,
manifolds, interconnecting piping and/or other devices or equipment. Bulk oxygen
systems have a storage capacities of more than 20,000 SCF of oxygen in liquid or
gaseous state, including unconnected reserves in or at the same building, structure
or premises. Bulk oxygen systems at industrial and institutional consumer sites shall
additionally comply with the requirements of NFPA 50.
CONTROL AREA - ANSWER: Spaces within a building that are enclosed and bounded
by exterior walls, fire walls, fire barriers and roofs, or a combination thereof, where
quantities of hazardous materials not exceeding the maximum allowable quantities
per control area are stored, handled or used, including any dispensing.
CRYOGENIC - ANSWER: A fluid having a boiling point lower than -130°F at 14.7
pounds per square inch absolute (psia) (an absolute pressure of 101.3 kPa). *For the
purposes of this exam Liquid Nitrous Oxide will be considered a cryogenic fluid.
CRYOGENIC CONTAINER - ANSWER: A pressure container, low-pressure container or
atmospheric container of any size designed or used for the transportation, handling
or storage of a cryogenic fluid, and which utilizes venting, insulation, refrigeration or
a combination thereof to maintain the pressure within design parameters for such
container and to keep the contents in a liquid state.
CRYOGENIC SYSTEM - ANSWER: An assembly of components, such as containers,
reactors, pumps, compressors and connecting piping and tubing, designed to
contain, distribute or transport cryogenics.
,DISPENSING - 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.
DOTn - ANSWER: United States Department of Transportation.
EXCESS FLOW CONTROL - ANSWER: A failsafe system or other approved device,
equipment or system designed to shut off flow caused by a rupture in a pressurized
piping system.
FLAMMABLE CRYOGENIC - ANSWER: A cryogenic fluid that is flammable in its vapor
state.
GAS ROOM - ANSWER: A separately ventilated, fully enclosed room in which only
cryogenics and associated equipment and supplies are stored or used.
GENERAL SUPERVISION - ANSWER: Supervision by the holder of any FDNY certificate
who is responsible for performing the duties of the certificate holder but need not
be personally present on the premises at all times.
HANDLING - ANSWER: The movement of a material in its container, the removal of
the material from its container, or any other action or process that may affect the
material, other than its storage or use
HEALTH HAZARD - ANSWER: A classification of a chemical for which there is
statistically significant evidence that acute or chronic health effects are capable of
occurring in exposed persons. The term "health hazard" includes chemicals that are
toxic, highly toxic and corrosive.
INCOMPATIBLE MATERIALS - ANSWER: Materials that, if mixed or combined, could
explode, generate heat, gases or other byproducts, or react in a way hazardous to
life or property.
LIQUID - ANSWER: A material having a melting point that is equal to or less than 68°F
and a boiling point that is greater than 68°F at 14.7 psia. When not otherwise
identified, the term "liquid" includes both flammable and combustible liquids.
LIQUEFIED CRYOGENICS - ANSWER: Gases that, in a packaging under the charged
pressure, are partially liquid at a temperature of 68F.
LOW-PRESSURE CONTAINER - ANSWER: A storage container designed to withstand
an internal pressure greater than 0.5 pounds per square inch gauge but not greater
than 15 psig.
MATERIAL SAFETY DATA SHEET (MSDS) - ANSWER: A document prepared in
accordance with the regulations of the United States Department of Labor, as set
, forth in 29 CFR Part 1910.1200 or a federally approved state OSHA plan which sets
forth information concerning a hazardous material. It contains health and physical
hazards of the material used, procedures that should be followed in case of an
emergency and safety work practices. MSDS does not show the cost of the cryogenic
fluids. (See Appendix at the end of the study materials).
MAXIMUM ALLOWABLE QUANTITY PER CONTROL AREA - ANSWER: The maximum
amount of a hazardous material allowed to be stored or used within a control area
inside a building or structure or an outdoor control area.
MAXIMUM ALLOWABLE WORKING PRESSURE - ANSWER: The maximum pressure
permissible at the top of a container in its operating position for a designated
temperature, as established by the container manufacturer.
NESTING - ANSWER: A method of securing flat-bottomed cryogenic containers
upright in a tight mass using a contiguous three-point contact system whereby all
containers within a group have a minimum of 3 points of contact with other
containers, walls or bracing
NORMAL TEMPERATURE AND PRESSURE - ANSWER: A temperature of 70°F and a
pressure of 1 atmosphere
OUTDOOR CONTROL AREA. - ANSWER: An outdoor area that contains hazardous
materials in amounts Nesting of Portable Containers THIS STUDY MATERIAL IS
PROVIDED FREE FOR THE PUBLIC 14 not exceeding the maximum allowable
quantities. (as set forth in the NYC Fire Code)
OXIDIZING GAS - ANSWER: A gas that can support and accelerate combustion of
other materials
PERSONAL SUPERVISION - ANSWER: Supervision by the holder of any FDNY
certificate who is required to be personally present on the premises, or other
proximate location acceptable to the FDNY, while performing the duties for which
the certificate is required.
PRESSURE VESSEL. - ANSWER: A closed vessel designed to operate at pressures
above 15 psig.
STANDARD CUBIC FEET (SCF) - ANSWER: Cubic feet of gas at normal temperature
and pressure.
STATIONARY TANK - ANSWER: A container having not less than 1,000- pound water
capacity, designed primarily for stationary installations, and not intended to be
moved in the course of normal use.