EGSA EGSA Fuel Systems and Storage

Question 1

According to NFPA 30 and NFPA 110, what is the maximum allowable capacity for a day tank installed inside a building for a diesel generator set?

Accepted Answer

100 gallons

Answer

NFPA 30 and NFPA 110 permit a maximum day tank capacity of 100 gallons inside a building for diesel-fueled generator sets.

Question 2

What is the primary purpose of a fuel polishing system on a diesel generator installation?

Accepted Answer

Remove water, sediment, and microbial contamination from stored fuel

Answer

Fuel polishing systems circulate stored diesel through filters and water separators to remove contaminants that degrade fuel quality over time.

Question 3

Which ASTM standard governs the specification for diesel fuel used in standby generator applications in the US?

Accepted Answer

ASTM D975

Answer

ASTM D975 is the standard specification for diesel fuel oils, including No. 2-D commonly used in standby generator sets.

Question 4

What microbial growth condition is commonly found in diesel fuel storage tanks and can clog filters and damage fuel systems?

Accepted Answer

Sulfate-reducing bacteria and fungi at the fuel-water interface

Answer

Sulfate-reducing bacteria and fungi thrive at the diesel-water interface in storage tanks, forming biomass that clogs filters and corrodes tanks.

Question 5

What is the recommended maximum storage life for diesel fuel in a properly maintained and sealed tank before polishing or testing is required?

Accepted Answer

12 months

Answer

Diesel fuel has a practical storage life of approximately 12 months; beyond that, oxidation and microbial growth degrade fuel quality unless treated or polished.

(EGSA) Electrical Generating Systems Association Certified Practice Test

(EGSA) Electrical Generating Systems Association Certified Practice Test

EGSA EGSA Fuel Systems and Storage