CHEMCO - Advanced Training for Chemical Tanker Cargo Operations Exit Exam Questions - Set 4

Question 1

Acidic solutions are formed in cargo tanks of tankers

Accepted Answer

A: when sulphur compounds in oil cargoes react with water

Answer

B: when sulphur compounds in oil cargoes react with oxygen

Answer

C: when sulphur compounds in oil cargoes react with hydrocarbon gas

Answer

D: when sulphur compounds in oil cargoes react with chemicals

Question 2

Tank level measurement of free water by gauging tape and plumb bob: find the labeling combination that is correct,

Accepted Answer

B: 1- Water Cut; 2- Water Innage; 3- Water Cut; 4- Water Ullage

Answer

A: 1 Water Innage; 2-Water Cut; 3- Water Cut; 4- Water Ullage

Answer

C: 1- Water Cut; 2- Water Innage; 3- Water Ullage; 4- Water Cut

Answer

D: 1- Water Cut; 2- Water Cut; 3- Water Innage ; 4- Water Ullage

Question 3

An inert gas generator burns what oil to generate inert gas ?

Accepted Answer

B: Gas oil

Answer

A: Crude oil

Answer

C: Heavy oil

Answer

D: Diesel oil

Question 4

Float gauges can only record liquid level greater than ___ inches.

Accepted Answer

B: four

Answer

A: five

Answer

C: ten

Question 5

Back flow of inert gas is prevented by:

Accepted Answer

B: The deck water seal

Answer

A: An isolating valve

Answer

C: A valve provided in the scrubber

Answer

D: The deck mechanical non-return valve

Question 6

Continuous exposure of the float to the fluctuation in sea level can damage the ___.

Accepted Answer

A: Tape tensioning device

Answer

B: diaphragm

Answer

C: sensors

Question 7

The float gauge is provided with a ____ valve.

Accepted Answer

B: gate

Answer

A: ball

Answer

C: pressure

Question 8

Tank coating requirements developed by IMO are applicable to

Accepted Answer

B: new crude oil tankers of 5000 DWT and above

Answer

A: new crude oil tankers of 5000 GRT and above

Answer

C: new crude oil tankers of 500 GRT and above

Answer

D: new crude oil tankers of 500 DWT and above

Question 9

A deepwell pump is a type of ___________.

Accepted Answer

B: centrifugal pump

Answer

A: screw pump

Answer

C: eductor

Answer

D: gear pump

Question 10

Bottom washing:

Accepted Answer

A: is done to remove traces of the previous cargo

Answer

B: will remove heavy wax sediments at the tank bottom

Answer

C: is not effective when carrying a small quantity of refined products

Answer

D: cannot be done with chemical solvents

Question 11

The total capacity of all slop tanks on an oil tanker normally should be

Accepted Answer

C: 3% of the total oil carrying capacity of ship

Answer

A: 1% of the total oil carrying capacity of ship

Answer

B: 2% of the total oil carrying capacity of ship

Answer

D: 4% of the total oil carrying capacity of ship

Question 12

Float gauge is a commonly used device in most of the tankers.

Accepted Answer

B: true

Answer

A: false

Question 13

An inert gas system is required to be fitted:

Accepted Answer

C: On crude oil tankers of above 20,000 tonnes deadweight

Answer

A: On all tankers of above 20,000 tonnes deadweight

Answer

B: On product tankers of above 20,000 tonnes deadweight

Answer

D: On chemical tankers of above 20,000 tonnes deadweight

Question 14

Radar gauge is a type of tank gauging equipment.

Accepted Answer

B: true

Answer

A: false

Question 15

Centrifugal pumps are otherwise known as

Accepted Answer

D: Hydro-dynamic pumps

Answer

A: Reciprocating pumps

Answer

B: Gravity pumps

Answer

C: Positive discplacement pumps

Question 16

The ring main pipeline system is extensively used on:

Accepted Answer

D: Product carriers

Answer

A: VLCCs

Answer

B: Crude oil tankers

Answer

C: Medium range tankers

Question 17

Class B fires are caused by

Accepted Answer

B: flammable liquids

Answer

A: combustible solids

Answer

C: flammable gases

Answer

D: electricity

Question 18

Use of Pressure-Vacuum (PV) Relief Valve; label the diagram correctly,

Accepted Answer

C: 1-Deck Isolating Valve; 2- IG Main; 3- Vent Main; 4- By-Pass Valve; 5- PV valve; 6- Tank Isolating Valve

Answer

A: 1-IG Main; 2-Deck Isolating Valve ; 3- Vent Main; 4- By-Pass Valve; 5- PV valve; 6- Tank Isolating Valve

Answer

B: 1-Deck Isolating Valve; 2- Vent Main; 3- IG Main; 4- By-Pass Valve; 5- PV valve; 6- Tank Isolating Valve

Answer

D: 1-Deck Isolating Valve; 2- IG Main; 3- Vent Main; 4- By-Pass Valve; 5 - Tank Isolating Valve; 6- PV valve

Question 19

Cargo tank fill alarm indicator panels:

Accepted Answer

D: are normally fitted in the cargo control room and sometimes on deck

Answer

A: are normally fitted on the bridge and sometimes on deck

Answer

B: are normally fitted in the engine control room and sometimes on deck

Answer

C: are normally fitted on the bridge and sometimes in the engine control room

Question 20

Identify the equipment in the IG system correctly,

Accepted Answer

B: 1- Demister; 2-O2 Analyzer; 3-Air Intake-Gas Freeing; 4- Regulating Valves; 5- Blowers

Answer

A: 1-O2 Analyzer ; 2-Demister; 3-Air Intake-Gas Freeing; 4- Regulating Valves; 5- Blowers

Answer

C: 1- Demister; 2-O2 Analyzer; 3 - Blowers ; 4- Regulating Valves; 5- Air Intake-Gas Freeing

Answer

D: 1- Demister; 2-O2 Analyzer; 3-Regulating Valves; 4-Air Intake-Gas Freeing ; 5- Blowers

Question 21

Tank level measurement by gauging tape and plumb bob: find the labeling combination that is correct,

Accepted Answer

A: 1- Reference Point; 2-Tape Cut; 3-Bob Cut; 4-Ullage; 5- Innage

Answer

B: 1- Reference Point; 2-Tape Cut; 3-Bob Cut; 4-Innage; 5- Ullage

Answer

C: 1- Bob Cut; 2-Reference Point; 3-Tape Cut; 4-Ullage; 5- Innage

Answer

D: 1- Innage; 2-Tape Cut; 3-Bob Cut; 4-Ullage; 5- Reference Point

Question 22

Sensors can be fixed horizontally at the required levels for enabling a high level alarm.

Accepted Answer

B: Horizontally

Answer

A: vertically

Answer

C: axially

Question 23

The liquid content at all levels throughout the depth of the tank can be determined by the capacitance gauge.

Accepted Answer

A: true

Answer

B: false

Question 24

Cargo discharging: find a statement that ensures safe cargo discharging from start to finish,

Accepted Answer

D: During discharge the oxygen content and pressure of the inert gas in the inert gas main should be continuously recorded as per regulation.

Answer

A: When the vessel arrives at the discharge port, the inert gas system should be tested and ready for operation in due time for discharge.

Answer

B: Before pumping of cargo oil is started, the inert gas system should be in operation and connected to the deck line, with the pressure control in the "automatic" position.

Answer

C: Cargo discharge should not be commenced until all the conditions have been checked; tanks should be re- pressurized if required

Question 25

Automatic shutdown systems independent of operator intervention: how to ensure that it will work correctly?

Accepted Answer

D: If the ship and shore shutdown circuits are to be linked their operation should be checked before cargo transfer begins; if not, the terminal should be informed of the closing rate of the ship's valves.

Answer

A: Express approval for their use is required from both the flag administration and the port state authorities.

Answer

B: Automatic shutdown systems are normally designed to shut the main cargo tank filling valve if the liquid level rises above the maximum level permitted.

Answer

C: Ensure that the activation point is set accurately, and that the operation of the device is checked by simulation whenever the system is recommissioned.

Question 26

Statements on Float Gauges; identify the key statement of importance,

Accepted Answer

B: If the float remains unsecured at sea it will almost certainly be damaged due to sloshing of the cargo

Answer

A: Floats should be secured when at sea, except briefly during measurement of tank contents.

Answer

C: Remote and local readings should be compared frequently to determine discrepancies;

Answer

D: Readings may need to be corrected to allow for tape and tank expansion or contraction, and ship trim and heel. Tables are normally provided for this purpose

Question 27

Several types of bobs connected to handheld tapes: Identify those correctly,

Accepted Answer

D: 1-Innage Bob; 2-Extension Outage Bob; 3-Plain Ullage Bob; 4-Deep-grooved ullaged Bob

Answer

A: 1-Innage Bob; 2-Plain Ullage Bob; 3-Extension Outage Bob; 4-Deep-grooved ullaged Bob

Answer

B: 1-Innage Bob; 2-Extension Outage Bob; 3-Deep-grooved ullaged Bob; 4-Plain Ullage Bob

Answer

C: 1-Extension Outage Bob; 2-InnageBob ; 3-Plain Ullage Bob; 4-Deep-grooved ullaged Bob

Question 28

Example of cargo heating system: identify correct labelling

Accepted Answer

C: 1-Compressed Air Line; 2-Steam Return Line; 3- Steam Supply Line; 4- Toxic Gas Detector

Answer

A: 1-Steam Return Line; 2-Compressed Air Line ; 3- Steam Supply Line; 4- Toxic Gas Detector

Answer

B: 1-- Toxic Gas Detector; 2-Steam Return Line; 3- Steam Supply Line; 4-Compressed Air Line

Answer

D: 1-Steam Supply Line; 2-Steam Return Line; 3-Compressed Air Line; 4- Toxic Gas Detector

Question 29

____ is passed through the signal lines of the differential pressure gauge.

Accepted Answer

A: Inert gas

Answer

B: air

Answer

C: liquid

Question 30

Inerting Operations:During normal operation of oil tankers the following operational modes frequently take place: find an operation that is required after tank cleaning during a ballast voyage and before loading

Accepted Answer

A: Inerting of empty tanks

Answer

B: Inerting during loading and simultaneous discharge of ballast

Answer

C: Inerting during loaded sea voyage

Answer

D: Inerting during discharging and ballasting

Advanced Training for Chemical Tanker Cargo Operations (CHEMCO) (Set 4)

Acidic solutions are formed in cargo tanks of tankers

Questions in CHEMCO Set 4

Question Discussion & Notes

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