1: The purpose of
inert gas systems aboard tank vessels is to __________.
a. allow
sufficient oxygen in the tank to sustain life
b. prevent outside
air from entering the tank
c. provide
increase in cargo discharge pressure
d. comply with
double hull pollution prevention regulations
2: In reference to
accidental oil pollution, the most critical time during bunkering is
when ________
a. you first start
to receive fuel
b. hoses are being
blown down
c. final topping
off is occurring
d. hoses are being
disconnected
3: When giving
mouth-to-mouth rescue breathing to an adult, you should breathe at
the rate of how many
breaths per
minute?
a. 4
b. 8
c. 12
d. 20
4: An inert gas
system installed on a tanker is designed to __________.
a. aid in the
stripping and cleaning of cargo tanks
b. increase the
rate of discharge of cargo
c. force toxic and
explosive fumes from a cargo tank to vent to the outside atmosphere
d. lower the
oxygen levels inside cargo tanks, making explosion nearly impossible
5: Your ship is
sinking rapidly. A container containing an inflatable liferaft has
bobbed to the
surface upon
functioning of the
hydrostatic release. Which action should you take?
a. Cut the painter
line so it will not pull the liferaft container down.
b. Swim away from
the container so you will not be in danger as it goes down.
c. Take no action
because the painter will cause the liferaft to inflate and open the
container.
d. Manually open
the container and inflate the liferaft with the hand pump.
6: The atmosphere
in a tank is too lean if it is __________.
a. incapable of
supporting combustion because the hydrocarbon content is below the
LFL (Lower
Flammable Limit)
b. capable of
supporting combustion because the hydrocarbon content is above the
UFL (Upper
Flammable Limit)
c. capable of
supporting a fire once started
d. not safe for
ballasting
7: Inflatable
liferafts are less maneuverable than lifeboats due to their
__________.
a. shape
b. shallow draft
c. large sail area
d. All of the
above
8: What is the
generally accepted method of determining whether the atmosphere
within a cargo tank is
explosive, too
rich, or too lean to support combustion?
a. Use the open
flame test on a small sample that has been taken from the tank.
b. Send a gas
sample ashore for laboratory analysis.
c. Enter the tank
with an oxygen analyzer.
d. Use an
explosimeter
9: Before using a
fixed CO2 system to fight an engine room fire, you must __________.
a. secure the
engine room ventilation
b. secure the
machinery in the engine room
c. evacuate all
engine room personnel
d. All of the
above
10: You are
fighting a fire in the electrical switchboard in the engine room. You
should secure the power, then
__________.
a. use a portable
foam extinguisher
b. use a
low-velocity fog adapter with the fire hose
c. use a portable
CO2 extinguisher
d. determine the
cause of the fire
11. The minimum
concentration of a vapor in air which can form an explosive mixture
is called the
__________.
a. auto-ignition
point
b. flash point
c. lower explosive
limit (LEL)
d. threshold limit
value (TLV)
12: The deck water
seal of the inert gas system __________.
a. cools the inert
gas and prevents soot from entering the cargo tanks
b. acts as an
emergency system shutdown when the inlet pressures exceed the safe
working pressure in
the hazardous zone
c. prevents the
backflow of hydrocarbon gasses into nonhazardous areas
d. relieves sudden
large overpressures in the system
13: The explosive
range of petroleum vapors mixed with air is __________.
a. 0% to 1%
b. 1% to 10%
c. 10% to 15%
d. 12% to 20%
14: Fuel oil tank
vents are fitted with a screen which will stop __________.
a. oil from
flowing out of the tank vent
b. air from
entering the tank vent
c. vapors from
leaving the tank vent
d. flames on deck
from entering the tank vent