Tanker Systems and Equipment Flashcards
7 cards from real Tanker Familiarization practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Tanker Systems and Equipment flashcards as text
What does 'vapor pressure' of a cargo determine in tanker operations?
Answer: The volatility of the cargo and the required venting arrangements
Vapor pressure indicates how readily a liquid forms vapors; high vapor pressure cargoes require more robust venting and inert gas protection.
On a gas tanker, what is the purpose of a reliquefaction plant?
Answer: To condense boil-off gas back into liquid cargo to minimize losses
A reliquefaction plant chills boil-off gas back into liquid, returning it to the cargo tanks and reducing cargo loss and vapor pressure buildup.
Which safety device automatically stops a cargo pump if the discharge pressure drops dangerously low?
Answer: Low-pressure auto-stop (deadman) switch
A low-pressure auto-stop switch detects cavitation or loss of prime conditions and shuts the pump down to prevent mechanical damage.
What is the purpose of 'tank gauging' using a closed (restricted) system on a chemical tanker?
Answer: To measure cargo quantity without opening the tank and releasing vapors
Closed gauging systems measure ullage electronically or by float, maintaining a sealed tank atmosphere and preventing release of toxic or flammable vapors.
A tanker's 'high-level alarm' on a cargo tank is set to activate at what approximate fill level?
Answer: 95–98% of tank capacity
High-level alarms typically trigger at 95–98% capacity to alert crew before the tank overflows, allowing time to stop loading.
What is the primary reason for heating certain cargo tanks on a tanker?
Answer: To prevent high-viscosity or high-pour-point cargoes from solidifying
Heavy fuel oils, molasses, and similar cargoes solidify at ambient temperatures and must be heated to remain pumpable during loading, transit, and discharge.
On a tanker, what does 'MFAG' stand for and how is it used?
Answer: Medical First Aid Guide — used to treat crew exposed to toxic cargo vapors
The MFAG (Medical First Aid Guide for Use in Accidents Involving Dangerous Goods) provides emergency medical guidance when crew are exposed to hazardous cargo vapors or spills.