EGSA Fuel Systems and Storage Flashcards

What is the function of a fuel transfer pump in a generator fuel system?

Answer: Transfer fuel from the main bulk tank to the day tank or base tank

Fuel transfer pumps move diesel from a remote bulk storage tank to the generator's day tank or sub-base tank, ensuring adequate fuel supply during extended operation.

When sizing a day tank for a diesel generator set, which factor is most critical to determine tank capacity?

Answer: Engine fuel consumption rate at full load multiplied by required runtime

Day tank capacity is determined by multiplying the engine's full-load fuel consumption rate (gal/hr) by the required autonomous runtime to ensure continuous operation.

What is the purpose of a fuel return line on a diesel engine generator set?

Answer: Return excess fuel and heat from the injection system back to the tank

Diesel injection systems deliver more fuel than the engine consumes; the return line routes excess heated fuel back to the tank, requiring consideration of tank temperature rise.

Which fuel additive type is used in cold climates to prevent diesel fuel from gelling and clogging fuel filters?

Answer: Cold flow improver (anti-gel additive)

Cold flow improvers lower the cold filter plugging point (CFPP) of diesel fuel, preventing wax crystal formation that can block filters in cold weather.

What does the Cloud Point of diesel fuel indicate?

Answer: The temperature at which wax crystals begin to form, clouding the fuel

The cloud point is the temperature at which dissolved wax begins to crystallize and cloud diesel fuel, signaling the onset of cold-temperature operability issues.

What is the recommended practice for fuel tank bottom water removal to prevent microbial growth and corrosion?

Answer: Drain accumulated water from tank sumps periodically as part of routine maintenance

Periodic draining of water from tank sumps removes the water layer that supports microbial growth and causes corrosion on tank walls and fuel system components.