Tanker Familiarization LNG- Questions
and Answers| Latest Update
At what pressure does your relief valve lift on an LNG tank? 17 psi
How many pounds per gallon are LNG tanks designed to hold? 4 pounds per gallons
What is the LENGTH of an industry standard LNG ship? 940 feet
What is the Maximum speed of the LNG ship? 21 Knots
What are the two methods used to maintain gas in a liquid state? Pressure and
Temperature
Why is LNG cargo considered less dangerous than LPG when it is being transported? LNG
is stored at slightly above atmospheric pressure when transported and LPG is stored under
pressure when being transported thus being more volatile.
What is the person who enters a confined space is known as? Entrant
What is the person who stays on the outside of a confined space to monitor the persons inside
doing work? Attendant
Loss of smell due to continues exposure of Hydrogen sulfide is called? Olfactory fatigue
What does OATH mean in terms of a safety line attached to an entrant inside a confined space?
O - OK (1 Pull on rope)
A - Allow slack. (2 Pulls on rope)
, T - Take up slack. (3 Pulls on rope)
H - Help (4 Pulls on rope)
How much percent is a LNG tank atmosphere maintained at? 100
What is a sign of leakage when transporting LPG and LNG? Vapor clouds
Why should the forced ventilation to a compartment where there is a fire be secured? To
stop oxygen from reaching the fire
What are High duty Gas Compressors used for? Transfer GNG vapors ashore during
loading
What is PEL (Permissible Exposure Limit)? the legal limit of a chemical substance or
physical agent that a worker can be exposed to during a typical eight-hour day and a standard
40-hour work week.
How many gases does LNG consist of? 5
What are the gases that LNG consist of? Methane, butane, propane, ethane and pentane
What is used for inert gas when you are in the shipyard. Inert gas generator
What is used for inert gas during operations or when underway? Nitrogen tank
A flammable liquid fire is what class? Class B
What is the Flash point for methane (LNG)? -306° F
and Answers| Latest Update
At what pressure does your relief valve lift on an LNG tank? 17 psi
How many pounds per gallon are LNG tanks designed to hold? 4 pounds per gallons
What is the LENGTH of an industry standard LNG ship? 940 feet
What is the Maximum speed of the LNG ship? 21 Knots
What are the two methods used to maintain gas in a liquid state? Pressure and
Temperature
Why is LNG cargo considered less dangerous than LPG when it is being transported? LNG
is stored at slightly above atmospheric pressure when transported and LPG is stored under
pressure when being transported thus being more volatile.
What is the person who enters a confined space is known as? Entrant
What is the person who stays on the outside of a confined space to monitor the persons inside
doing work? Attendant
Loss of smell due to continues exposure of Hydrogen sulfide is called? Olfactory fatigue
What does OATH mean in terms of a safety line attached to an entrant inside a confined space?
O - OK (1 Pull on rope)
A - Allow slack. (2 Pulls on rope)
, T - Take up slack. (3 Pulls on rope)
H - Help (4 Pulls on rope)
How much percent is a LNG tank atmosphere maintained at? 100
What is a sign of leakage when transporting LPG and LNG? Vapor clouds
Why should the forced ventilation to a compartment where there is a fire be secured? To
stop oxygen from reaching the fire
What are High duty Gas Compressors used for? Transfer GNG vapors ashore during
loading
What is PEL (Permissible Exposure Limit)? the legal limit of a chemical substance or
physical agent that a worker can be exposed to during a typical eight-hour day and a standard
40-hour work week.
How many gases does LNG consist of? 5
What are the gases that LNG consist of? Methane, butane, propane, ethane and pentane
What is used for inert gas when you are in the shipyard. Inert gas generator
What is used for inert gas during operations or when underway? Nitrogen tank
A flammable liquid fire is what class? Class B
What is the Flash point for methane (LNG)? -306° F
