Acc. Ask: Chp 5,7,8 (Theory)

Name & Matric ID:

Fixed roof tank is being used rather than open top tank due to the risk of evaporation loss for an open top tank

• True
• False

Which of the following statement is NOT true.

• Open Top Tank oil storage tanks are widely used due to its safety consequences
• The gas demand fluctuated during summer (high) and winter (low) for a western country
• natural gas is liquified under low temperature and high pressure
• All above

Which of the following statement on Depleted reservoir storage is True?

• characteristic such as porosity and permeability can limit injection and withdrawal rate
• High disruption to environment beyond that caused by original drilling operations
• Less access points to reservoir eliminating service disruptions due to well problems
• All above

Which of the following disadvantages of Aquifer is True?

• Maintaining integrity of the gas/water interface imposes limits on operating flexibility
• Requires a relatively large base gas to working gas ratio
• Higher potential for water supply contamination
• All above

Salt caverns hold the gas tightly in the reservoir due to the high density and plasticity of the wall that avoid the gas from permeated through it.

• True
• False

Which of the following statement is True regarding on the Line pack system

• during pack, flow rate will be maximum
• During unpack, flow rate will be the average of max and min flowrate
• A temporary storage that need a large vacant site
• All above

The Boil Off Gas (BOG) is the continuously evaporated causes the pressure inside the tank to reduce which changes the quality of LNG over

• True
• False

Which of the following statement is Not True regarding on the flat bottom tank?

• The difference between single, double and full containment flat bottom tank is in the method of secondary containment
• The full containment roof is made of materials that can handle cryogenic temperatures, and if the inner tank leaks, all liquids and vapors are still contained within the outer wall and roof
• For double containment, the inner and outer shell contain liquid and vapor
• For a single containment, inner shell contain liquid and vapor

Which of the following sketch and labels of flat bottom tank is Not True?

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