EGSA EGSA Fuel Systems and Storage 2

Question 1

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

Accepted Answer

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

Answer

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.

Question 2

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

Accepted Answer

Engine fuel consumption rate at full load multiplied by required runtime

Answer

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.

Question 3

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

Accepted Answer

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

Answer

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.

Question 4

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

Accepted Answer

Cold flow improver (anti-gel additive)

Answer

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

Question 5

What does the Cloud Point of diesel fuel indicate?

Accepted Answer

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

Answer

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.

(EGSA) Electrical Generating Systems Association Certified Practice Test

(EGSA) Electrical Generating Systems Association Certified Practice Test

EGSA EGSA Fuel Systems and Storage 2