This OCTO exit exam questions and answer quiz contain questions Answer
If you find any questions incorrect, please let us know by Clicking here.
1. A gas venting
system 011 a tanker that has gas lines in each tank connected to a common gas
main running the full length of the ship is called:
A gas-main system
A common-main
system
A vent-main system
An independent system
2. Category Z noxious
liquid substances from tank cleaning are deemed to present a hazard; find the
correct statement.
Justify the prohibition of discharge into the marine environment
Justify a limitation on the quantity of discharge into the marine environment
Justify less
stringent restrictions of discharge into the marine environment
3. Acidic solutions are formed in cargo tanks
of tankers
When Sulphur compounds in oil cargoes react with water
When Sulphur compounds in oil cargoes react with oxygen
When Sulphur compounds in oil cargoes react with hydrocarbon gas
When Sulphur compounds in oil cargoes react with chemicals
4. What are closed
operations?
Ballasting, loading
or discharging operations carried out without opening ullage ports •
To prevent the escape of hazardous vapor from tanks
Remote control of tank delivery valves
Remote control of inert gas entry into a tank
5. The change in
resistance of hot filament in tank scope is displayed as:
% Volume of oxygen
% Volume of inert gas
% Volume of
hydrocarbon
6. The important series of hydrocarbons found
in almost every petroleum mixture from any part of the world is
Paraffin
Aromatic
Asphaltene
Napthine
7. The content of
cycloparaffins in petroleum may vary
Up to 60%
Up to 70%
Up to 35%
Up to 50%
8. Vapor pressure in cargo tanks is affected by:
type of cargo
density of cargo
temperature of
cargo
inert gas
9. Sublimation is the
phase transition of a substance:
From the liquid to the solid phase
From the solid to the liquid phase
From to the gas phase to the solid phase
From the solid to the
gas phase
10. The most stable
naphthenic hydrocarbons are the naphthene rings with
Seven and Eight carbon atoms
Two and four carbon atoms
five and six carbon
atoms
Four and seven car bon atoms
11. Static
accumulator oils have an electrical conductance of less than
5 Pico Siemens per meter
25 Pico Siemens per meter
50 Pico Siemens per
meter
100 Pico Siemens per meter
12. Paraffins are
fully saturated (no double bond). They remain unchanged over long periods of
geological time and they are
Unstable
Soluble
stable
Reactive
12. Paraffins are
pure hydrocarbons containing:
only hydrogen
only carbon
carbon and hydrogen
bromine
13. Cargoes should
not be loaded into a tank that is not specially for that duty if it exceeds
normal atmospheric pressure at
60.0 Deg C (140 Deg F)
15.6 Deg C (60 Deg F)
25.0 Deg C (77 Deg F)
37.8 Deg C (100 Deg F)
14. Which category of
NLS chemical in bulk poses maximum threat?
y
OS
X
Z
15. Cargo tank fill
alarm indicator panels:
are normally fitted on the bridge and sometimes on deck
are normally fitted in the engine control room and sometimes on deck
are normally fitted on the bridge and sometimes in the engine control room
are normally fitted in the cargo control room and sometimes on deck
16. Tank coating requirements developed by IMO
are applicable to
new crude oil tankers of 5000 GRT and above
new crude oil tankers
of 5000 DWT and above
new crude oil tankers of 500 GRT and above
new crude oil tankers of 500 DWT and above
17. The total
capacity of all slop tanks on an oil tanker normally should be
1% of the total oil carrying capacity of ship
2% of the total oil carrying capacity of ship
3% of the total oil
carrying capacity of ship
4% of the total oil carrying capacity of ship
18. In chemical tankers the coding system used by the IBC Code for an independent tank is
1
2
G
P
19. Which of the
following is cofferdam?
Chain locker
Pump room on an oil tanker
Deep tank
Slop tank on an oil tanker
20. The purpose of a
cofferdam between two compartments is to
Store tools and equipment that are necessary for the adjacent compartments
Give access to the bulkhead for inspection and repairs when the tanks are full with liquid
Keep a reserve space if the capacity of either compartment needs to be increased
Prevent different liquids
from the two tanks coming in contact in case of a leak
21. Which pump must always be primed?
Centrifugal pump
Reciprocating pump
Rotary pump
22. What does
"VECS" stand for?
Vector control system
Vapor emission
control system
Very economical control system
An arrangement for release of cargo vapor
23. The minimum safety during EGB soot blow must be carried out with
a) The OOW & Masters consent avoid soot blow during the purging time
b) Any time excluding the dark night hours
c) At 12 hours interval
d) At 8 hrs. interval
24. Why is a warning sign displayed at the gangway or access point of a barge during cargo transfer?
a) To indicate any health risk if applicable
b) To keep visitors away from the barge-No smoking, no open lights, no visitors
c) To designate smoking areas
d) To indicate if the cargo is a marine pollutant
25. Oxygen deficiency will begin to cause problems to personnel, do you feel to measure the atmosphere before entering clean Tanker?
a) Not necessary for ballast tanks
b) Always necessary for ballast tanks
c) Not necessary if the tank is filled up twice and discharged at sea
d) Not necessary if the tank is ventilated by external fans
26. Which party is responsible for arranging the reducers or enlarger short pieces to the manifold?
a) The Cargo supplier
b) The Cargo Surveyors
c) The Ships Mooring crew
d) The tankers staff for the operation
27. Very light gaseous molecules such as ______ are extracted at the well head
a) Methane
b) Butane
c) Propane
d) None of these
28. Closed Gauging System: This type of gauging is done extensively on vessels with inert gas systems. Such a system that allows no vapors to atmosphere is a true closed system while other types that allow minimum vapors to be lost to the atmosphere are called “restricted systems”.
a) True
b) False
29. In the event of a pneumatic remote-control failure in the inert gas plant I/P and E/P controllers, during discharge _____
a) The inert gas plant must be operational within one hour of failure and the discharging may continue for this time
b) The discharge must be immediately halted
c) The discharge rate must be reduced until the plant is repaired
d) The venting of IG is set to maintain a predetermined pressure and the discharge can continue manually
30. What are Handy size tankers
a) Tankers of about 12,000 to 25,000 DWT
b) From 26,000 to 16,500 DWT
c) Under 16,500 DWT
d) From 36000 to 26000 dwt
