OCTO exit exam questions and answer quiz contain questions Answer
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151. What are consequences of a ballast tank vent
not working during deballasting operation?
a. The tank de pressurization and denting of
side plates.
b. The tanks taking in cargo vapors during loading operation.
c. The cargo tank alteration of ullage are taking place.
d. Combination of all three a,b,c
152. Type 1 ship is a chemical tanker intended to
transport chapter 17 of the IBC code product with very severe environmental and
safety hazards which require maximum preventive measure to preclude an escape
of such cargo.
a. False
b. True
c. High concentration of acid and organic compounds
d. Both(b)and(c)
153. A vessel is fitted with a sample locker or
spill containment locker in the amidships, what is the general arrangement for
firefighting of that compartment.
a. Foam applicator equipment.
b. Sprinkler system from the fire main
c. Portable extinguishers situated outside the compartment.
d. Any one of (A)or (C) in addition to (B)
154. The inert gas leaving the demister is
saturated with
a. 90%RH
b. 80%RH
c. 100%RH
d. 60%RH
155. In IG the mass
of the water vapor contained in a given volume of saturated gas depends on
the.........of the gas
a. temperature
b. color
c. volume
d. velocity
156. Which of the
following is a safety consideration when dealing with liquefied gas?
a. its corrosive
b. it's cold
c. it's cacogenic
d. its caustic
157. Before entry
into a cargo tank which has contained a petroleum product.........
a. adjacent tanks must be empty
b. the tank must be filled with fresh water and emptied
c. static electricity must be measured
d. the tank must be tested for a sufficient amount of oxygen
158. The blower casing is of ...... material
a. highly water resistant
b. corrosion resistant
c. both a and b
d. none of the above
159. This valve is
used in conjunction with closed and restricted measurement equipment to allow
measurement in ship tanks that are closed to the atmosphere. Once a portable
measurement unit (PMU) is attached to the VCV, the valve is opened and the PMU
probe is dropped into the tank to perform the required measurement.
a. PMU point
b. measurement valve
c. Both (A) and (B)
d. vapor control valve (VCV)
183. Which of the following describes a liquefied
gas?
a. a liquid that needs to be stored at absolute zero to prevent it from becoming gaseous.
b. a gas that is mixed with another substance that causes it to liquefy
c. a substance that at normal temperature and pressure would be a gas
d. a liquid that is required to be heated above normal ambient temperature to make it from a gas
161. On many modern VLCC tankers which of the following
device is used to top up IG pressure on loaded condition in case of slight
reduce in tank temperature.
a. IG by the boiler plant and standard method
b. do not fire the main boiler plant due to excess fuel consumption which is more than allowed in the agreement
c. a separate IGG plant if installed separately
d. wait till the discharge port. Open the tank vent to allow a little rise in tank pressure
162. As well as chemical what may chemical tankers
also be used to transport.......
a. waste products
b. other liquid products
c. nuclear waste
d. bulk acids
163. The IG blower ........introduced pressure
fluctuations in inert gas demand.
a. must not
b. should
c. may or may not
d. none of the above
164. Are all pumps and blowers shut down during
the emergency shut down procedure of a shipboard inert gas system?
a. no, the sea water pumps and the blowers are still running
b. no, the scrubber sea water pumps are still running
c. no, sea water cooling of deck seal running
d. yes, all is shut down
165. Heat released from fire 80% of heat is
conducted through conduction
a. true
b. false
166. The draft reading at the middle of the ship
markings, this draft can and often does, differ from the mean draft due to hogging
or sagging
a. mean draft
b. moulded draft
c. midship draft
d. none of the above
167. Mast riser fire doesn't normally occur during
a. purging
b. discharging
c. loading
d. purging inert gas pressure during normal passage
168. What is the term for filling tanks with
nitrogen, or similar liquid or gas to prevent cargo contact with the
atmosphere?
a. covering
b. padding
c. blanketing
d. inerting
169. Ballast water may be loaded into tanks
previously containing NLS that have been ......
a. stripped
b. properly cleaned
c. discharged
d. certified to carry ballast
170. The proportion of nitrogen in inert gas is
approximately......
a. 51% by vol
b. 77% by vol
c. 56% by vol
d. 85%by vol
171. A raised bridge running fore and aft from the midship house, and also called walkway.it affords safe passage over the pipeline
and other deck obstruction.
a. safe walkway
b. anchor station walkways
c. catwalk
d. gas escape routes
172. What is the
expansion ratio for low expansion foam?
a. from about 3:1 up to about 20:1
b. from about 5.1 up to about 10.1
c. from about3.1 up to about 5.1
d. from about 10.1 up to about 20.1
173. International load line certificate -A document issued by a classification society stating the minimum freeboard granted to a vessel and giving the position of the loading disc on ships side/
a. true
b. false
174. The static suction head of a pump is the
........
a. force necessary to overcome frictional losses in the pump and piping.
b. amount in inches of mercury the total suction head is below atmospheric pressure.
c. distance of the suction liquid level above
the center line of the pump
d. distance of the suction liquid level below the center line of pump
175. General arrangement plan-A drawing of a ship
which lists all necessary statistics and operating information such as
a. LOA, SDWT, cargo, water, fuel capacity etc.
b. type of cargo and ships
c. water ballast exchange log
d. all of the above
176. Which firefighting equipment is most efficient and with the least side effects
in case of a large fire in the engine room?
a. central foam extinguishing system
b. powder extinguishing system
c. central gas extinguishing system and or
water fog
d. sprinkler system
177. When approaching
a fire from windward, you should shield firefighters from the fire by using
.........
a. low velocity fog
b. high velocity fog
c. straight stream of water
d. foam spray
178. In the chemical trade the acceptable means of
cargo line segregation in case of two non-compatible products is
a. by double blank flanges with a drain
between them
b. by double valve segregation using sluice valve only
c. by a single blank flange
d. by double valve segregation
179. Care should be taken when disconnecting cargo
pipelines and lines because.......
a. the pipes are delicate
b. the pipes may be brittle
c. the pipes may be electrically charged
d. residues may spill out
180. If a bonding
cable is not connected by the terminal when joining a manifold for cargo
operation........
a. you should not commence cargo operation
b. you should use an international shore connection
c. you should insert insulating flanges or
single length of non-conducting hose
d. you should use an oxygen analyzer at all times
