NCF Safety Exam Questions And Accurate Answers 100% Verified
There are four general classes of fires. List each of the classes of fires and the type of
extinguisher which you should use to put out the fire. - ANSWER Class A: water
Class B: covering the container holding the burning liquid or by spraying it with foam
Class C: inert gas or dry chemicals
Class D: inert powder
Name some common hazards associated with chemicals. - ANSWER Fire Hazards
Explosions Hazards (incompatible chemicals)
Extremely Toxic Chemicals
Lachrymators (substances that irritate the eyes and produce tears)
Vesicants (substances that can blister and burn body tissues by contact with the skin or
inhalation)
Carcinogens (substances that produce cancer)
Explain the problems which may be associated with wearing contact lenses in a
chemical laboratory. - ANSWER If chemicals should enter the eye, these can be held
against the eyeball and not washed free due to contact coverage.
Soft contacts may absorb organic vapors.
What does the fire alarm sound like and what is its function? - ANSWER These alarms
are loud buzzers throughout the building. If you hear the fire alarm, leave the building
right away! The alarms call the UIC police and the fire department.
What are appropriate circumstances for using fire fighting equipment and first aid
equipment? - ANSWER Lab personnel should attempt to put out only small fires when
they are confident the fires can be extinguished rapidly and when they themselves are
not endangered. They should then call UIC police and EHSO to report the fire and use of
equipment. If the fire is too big to put out very quickly, call the fire department (if
, possible by phone), activate a fire alarm to evacuate the building, and meet the fire
fighters at the building entrance to direct them to the fire. First aid should be
administered to anyone who is hurt. This includes removing the victim from the source
of the injury and control of life-threatening conditions such as bleeding or shock and
lack of breathing or heartbeat.
How are emergency doors used? - ANSWER The doors are weakly bolted closed so that
a hard impact will cause the bolt to break and the door to open.
Where is the fume hood fan cut-off located in the lab area? - ANSWER Each set of hoods
in a "lab module" is operated through the same blower. The switch for this blower is a
red panic button just inside the doors to the lab. There is also an ON/OFF switch on the
hood. This closes the damper on that particular hood.
What type of electrical cutoffs are available? - ANSWER A single circuit breaker box
located at one of the lab entrances
The bench area outlets pose a particularly serious hazard - explain. - ANSWER These
circuits are supplied by several adjacent breakers in the circuit box so that two adjacent
outlets will be taken from different legs of the three-phase main power supply. It is
possible to have electrical potentials as high as 240 volts at 50 amps. Frayed electrical
wires can easily cause a very dangerous exposure to high voltage.
State the correct procedure for labeling a waste chemical container. - ANSWER Use the
Hazardous Waste labels specifically designated for this purpose. Mark the name of the
chemical and the date. Place the label on a waste bottle to completely cover any
previous label on that container.
Solvents collected for disposal are only accepted if the containers are fireproof cans or
polyethylene jerricans. Outline the reasons for use of these types of containers and the
solvents which should be kept in each. - ANSWER The fireproof cans should be used
with flammable non-corrosive solvents, these solvents will not lead to corrosion of the
metal but the can will provide protection in the event of a fire.
The polyethylene jerricans are used for corrosive nonflammable solvents, these
containers will prevent corrosion from the solvents with no danger of breakage.
There are four general classes of fires. List each of the classes of fires and the type of
extinguisher which you should use to put out the fire. - ANSWER Class A: water
Class B: covering the container holding the burning liquid or by spraying it with foam
Class C: inert gas or dry chemicals
Class D: inert powder
Name some common hazards associated with chemicals. - ANSWER Fire Hazards
Explosions Hazards (incompatible chemicals)
Extremely Toxic Chemicals
Lachrymators (substances that irritate the eyes and produce tears)
Vesicants (substances that can blister and burn body tissues by contact with the skin or
inhalation)
Carcinogens (substances that produce cancer)
Explain the problems which may be associated with wearing contact lenses in a
chemical laboratory. - ANSWER If chemicals should enter the eye, these can be held
against the eyeball and not washed free due to contact coverage.
Soft contacts may absorb organic vapors.
What does the fire alarm sound like and what is its function? - ANSWER These alarms
are loud buzzers throughout the building. If you hear the fire alarm, leave the building
right away! The alarms call the UIC police and the fire department.
What are appropriate circumstances for using fire fighting equipment and first aid
equipment? - ANSWER Lab personnel should attempt to put out only small fires when
they are confident the fires can be extinguished rapidly and when they themselves are
not endangered. They should then call UIC police and EHSO to report the fire and use of
equipment. If the fire is too big to put out very quickly, call the fire department (if
, possible by phone), activate a fire alarm to evacuate the building, and meet the fire
fighters at the building entrance to direct them to the fire. First aid should be
administered to anyone who is hurt. This includes removing the victim from the source
of the injury and control of life-threatening conditions such as bleeding or shock and
lack of breathing or heartbeat.
How are emergency doors used? - ANSWER The doors are weakly bolted closed so that
a hard impact will cause the bolt to break and the door to open.
Where is the fume hood fan cut-off located in the lab area? - ANSWER Each set of hoods
in a "lab module" is operated through the same blower. The switch for this blower is a
red panic button just inside the doors to the lab. There is also an ON/OFF switch on the
hood. This closes the damper on that particular hood.
What type of electrical cutoffs are available? - ANSWER A single circuit breaker box
located at one of the lab entrances
The bench area outlets pose a particularly serious hazard - explain. - ANSWER These
circuits are supplied by several adjacent breakers in the circuit box so that two adjacent
outlets will be taken from different legs of the three-phase main power supply. It is
possible to have electrical potentials as high as 240 volts at 50 amps. Frayed electrical
wires can easily cause a very dangerous exposure to high voltage.
State the correct procedure for labeling a waste chemical container. - ANSWER Use the
Hazardous Waste labels specifically designated for this purpose. Mark the name of the
chemical and the date. Place the label on a waste bottle to completely cover any
previous label on that container.
Solvents collected for disposal are only accepted if the containers are fireproof cans or
polyethylene jerricans. Outline the reasons for use of these types of containers and the
solvents which should be kept in each. - ANSWER The fireproof cans should be used
with flammable non-corrosive solvents, these solvents will not lead to corrosion of the
metal but the can will provide protection in the event of a fire.
The polyethylene jerricans are used for corrosive nonflammable solvents, these
containers will prevent corrosion from the solvents with no danger of breakage.
