LGTCO/LGTF - Liquefied Gas Tanker Cargo Operations Exit Exam Questions - Set 6

Question 1

Running two identical centrifugal cargo pumps in parallel will result in:

Accepted Answer

B: Almost double the discharge flow rate with discharge pressure largely unchanged

Answer

A: Almost double the discharge pressure with the same discharge rate

Answer

C: Double discharge rate and double discharge pressure simultaneously

Answer

D: The exact same discharge pressure and rate as running one pump

Question 2

Whether cargo tanks are of Type 'A', 'B' or 'C', a complete double hull is required for carriage of liquefied gas cargoes below what temperature?

Accepted Answer

B: -55°C

Answer

A: -88°C

Answer

C: -104°C

Answer

D: -162°C

Question 3

What is the minimum water application rate of the fixed water spray system for fire protection purposes on horizontal deck surfaces?

Accepted Answer

A: 10 litres/m² per minute

Answer

B: 4 litres/m² per minute

Answer

C: 20 litres/m² per minute

Answer

D: 15 litres/m² per minute

Question 4

What is the minimum water application rate of the fixed water spray system for fire protection purposes on vertical surfaces?

Accepted Answer

B: 4 litres/m² per minute

Answer

A: 8 litres/m² per minute

Answer

C: 12 litres/m² per minute

Answer

D: 15 litres/m² per minute

Question 5

In fixed gas-detection systems on board gas carriers, the Gas Codes mandate that sampling intervals from any one space must not exceed:

Accepted Answer

B: 30 minutes

Answer

A: 60 minutes

Answer

C: 45 minutes

Answer

D: 20 minutes

Question 6

What is the name of the statutory certificate issued by a Flag Administration confirming that a gas carrier complies with the IGC/GC Gas Code?

Accepted Answer

D: International Certificate of Fitness for the Carriage of Liquefied Gases in Bulk

Answer

A: Certificate of Construction

Answer

B: Load Line Certificate

Answer

C: Safety Construction Certificate

Question 7

Which space is defined as the space enclosed by the ship's structure in which a cargo containment system is situated?

Accepted Answer

B: Hold space

Answer

A: Interbarrier space

Answer

C: Void space

Answer

D: Cofferdam

Question 8

Which petroleum gases does commercial LPG mainly consist of?

Accepted Answer

D: Propane & Butane

Answer

A: Ethane & Pentane

Answer

B: Butadiene & Ammonia

Answer

C: Chlorine & Ethylene

Question 9

What is the primary purpose of inerting on a liquefied gas carrier?

Accepted Answer

A: To prevent flammable vapour/air mixtures in cargo tanks and associated piping

Answer

B: To increase oxygen content in vapour/air mixtures in tanks

Answer

C: To increase hydrocarbon concentration in vapour/air mixtures

Answer

D: To pressurize cargo tanks for deepwell pump suction

Question 10

What is the function of membrane tank on a liquefied gas carrier?

Accepted Answer

C: a non-self-supporting LNG containment system supported by the ship structure

Answer

A: to replace cargo documentation

Answer

B: to reduce crew watchkeeping requirements

Answer

D: to store domestic fresh water

Question 11

What is the function of secondary barrier on a liquefied gas carrier?

Accepted Answer

C: provides protection if primary containment leaks

Answer

A: to reduce crew watchkeeping requirements

Answer

B: to replace cargo documentation

Answer

D: to store domestic fresh water

Question 12

What is the function of insulation on a liquefied gas carrier?

Accepted Answer

C: reduces heat ingress into low-temperature cargo

Answer

A: to replace cargo documentation

Answer

B: to reduce crew watchkeeping requirements

Answer

D: to store domestic fresh water

Question 13

What is the function of interbarrier space on a liquefied gas carrier?

Accepted Answer

B: space between primary and secondary barriers

Answer

A: to replace cargo documentation

Answer

C: to reduce crew watchkeeping requirements

Answer

D: to store domestic fresh water

Question 14

What is the function of cargo tank relief valve on a liquefied gas carrier?

Accepted Answer

A: prevents overpressure of the cargo tank

Answer

B: to reduce crew watchkeeping requirements

Answer

C: to replace cargo documentation

Answer

D: to store domestic fresh water

Question 15

A flange leak during transfer should be handled by:

Accepted Answer

C: following emergency stop, isolation, and notification procedures

Answer

A: to continue without supervision

Answer

B: to ignore minor changes

Answer

D: to wait until the next port

Question 16

What should be done if portable gas detector gives abnormal reading?

Accepted Answer

D: treat it as unsafe until confirmed and investigated

Answer

A: continue operation and check later

Answer

B: open nearby drains to atmosphere

Answer

C: silence alarms and ignore

Question 17

How does safety culture support safe LGTF operations?

Accepted Answer

D: unsafe conditions are reported and corrected

Answer

A: by replacing cargo equipment maintenance

Answer

B: by allowing alarms to be ignored

Answer

C: by removing the need for training

Question 18

What is the role of purge gas in liquefied gas cargo handling?

Accepted Answer

D: used to change the atmosphere in a line or tank safely

Answer

A: to prepare lifeboat provisions

Answer

B: to reduce navigation watch requirements

Answer

C: to replace fire detection systems

Question 19

Why is SCBA rescue important before or during enclosed space work on gas carriers?

Accepted Answer

D: used when atmosphere is unsafe or unknown

Answer

A: it allows entry without atmosphere testing

Answer

B: it speeds up cargo documentation only

Answer

C: it is needed only for passenger vessels

Question 20

In LGTF operations, nitrogen padding is best defined as:

Accepted Answer

D: using nitrogen to maintain a non-reactive atmosphere

Answer

A: a method to avoid all cargo sampling

Answer

B: a document used only by the catering department

Answer

C: a way to reduce voyage distance

Question 21

What is the purpose of rounds on deck during LGTF cargo operations?

Accepted Answer

D: verify local conditions not visible from the control room

Answer

A: to avoid using checklists

Answer

B: to increase cargo temperature deliberately

Answer

C: to permit unattended transfer

Question 22

What is the purpose of a high level alarm in gas tanker cargo operations?

Accepted Answer

D: warns before an overfill condition develops

Answer

A: to increase engine speed

Answer

B: to replace bridge navigation equipment

Answer

C: to remove the need for watchkeepers

Question 23

Select the correct answer: Smoking is acceptable near the manifold if no smell is noticed.

Accepted Answer

D: FALSE

Answer

A: Only in port state inspection

Answer

B: Only during dry dock

Answer

C: Cannot be decided by safety rules

Question 24

Select the correct answer: Tank pressure and temperature are important cargo watch parameters.

Accepted Answer

D: TRUE

Answer

A: Only in port state inspection

Answer

B: Cannot be decided by safety rules

Answer

C: Only during dry dock

Question 25

What is the main purpose of the emergency response plan in liquefied gas tanker operations?

Accepted Answer

C: guides crew actions during incidents

Answer

A: to replace the Master's standing orders

Answer

B: to allow unsafe shortcuts

Answer

D: to remove the need for toolbox talks

Question 26

What is the main purpose of the IGC Code in liquefied gas tanker operations?

Accepted Answer

C: sets requirements for ships carrying liquefied gases in bulk

Answer

A: to allow unsafe shortcuts

Answer

B: to replace the Master's standing orders

Answer

D: to remove the need for toolbox talks

Question 27

What is the main purpose of the STCW training in liquefied gas tanker operations?

Accepted Answer

B: ensures seafarers have competence for tanker duties

Answer

A: to allow unsafe shortcuts

Answer

C: to replace the Master's standing orders

Answer

D: to remove the need for toolbox talks

Question 28

What is the main purpose of the risk assessment in liquefied gas tanker operations?

Accepted Answer

B: identifies hazards and control measures before work

Answer

A: to allow unsafe shortcuts

Answer

C: to replace the Master's standing orders

Answer

D: to remove the need for toolbox talks

Question 29

What is the main purpose of the terminal regulations in liquefied gas tanker operations?

Accepted Answer

A: local rules that must be followed during cargo operations

Answer

B: to allow unsafe shortcuts

Answer

C: to replace the Master's standing orders

Answer

D: to remove the need for toolbox talks

Question 30

What is the purpose of a flammable gas detector in gas tanker cargo operations?

Accepted Answer

B: detects vapour concentration related to LEL

Answer

A: to increase engine speed

Answer

C: to replace bridge navigation equipment

Answer

D: to remove the need for watchkeepers

Liquefied Gas Tanker Cargo Operations (LGTCO/LGTF) (Set 6)

Running two identical centrifugal cargo pumps in parallel will result in:

Questions in LGTCO/LGTF Set 6

Question Discussion & Notes

Leave a Comment / Clarification