ENGINEERING DUTY OFFICER (EDO) EXAM 2025 QUESTIONS AND ANSWERS
Two fuel heaters located in MER1 and MER2, are capable of heating fuel from 40 degrees F to 80
degrees F +_ 5 at a flow rate of how many gallons per minute at what P S I G. - (answer)110 gallons per
minute.
55 P S I G
What is the flash point for fuel oil? - (answer)140 degrees
What is FOTG - (answer)Fuel alignment for GTG
What are fuel pumps rated at? - (answer)Slow 36 GPM
Fast 72 GPM
105 P S I
What is the fuel pump relief valve set to? - (answer)130 P S I G
Describe the fuel unloader valve. - (answer)Regulates pressure back to the tank.
Fails shut.
LP air operated.
Designed to maintain fuel pressure at 35 P S I G.
When do you bypass the fuel heater? - (answer)In an emergency suction can be taken from storage tank
bypassing the fuel heater and purifier.
, ENGINEERING DUTY OFFICER (EDO) EXAM 2025 QUESTIONS AND ANSWERS
If JP-5 is to be used.
The fuel oil heater maintains header temp at what temperature? - (answer)85 degrees F.
What does the fuel pre filter do? - (answer)Remove sediment.
What is the max DP for the fuel pre filter? - (answer)18.
What is quick heat? - (answer)This is where the lube oil purification system to include heater to both
purify and heat the main lube oil system to 90 degrees.
When would you use quick heat? - (answer)During very cold weather or when an emergency underway
must occur.
What are the temperatures for the chill box and freeze box? - (answer)Chill box is 33 to 36 degrees.
Freeze box is 0 to 5 degrees.
True or false. Refueling operations are controlled from the oil test lab. - (answer)True.
An Oil king Assistant will be stationed at the deck riser to open/close the fill valve and to take what
required fuel samples? - (answer)Initial, midpoint, end samples, and every 15 minutes.
Who will perform a safety brief for transferring lube oil and fuel oil in port from pier to ship? -
(answer)EDO
During in port fueling flow rates shall not exceed how many gallons per minute? - (answer)400
Two fuel heaters located in MER1 and MER2, are capable of heating fuel from 40 degrees F to 80
degrees F +_ 5 at a flow rate of how many gallons per minute at what P S I G. - (answer)110 gallons per
minute.
55 P S I G
What is the flash point for fuel oil? - (answer)140 degrees
What is FOTG - (answer)Fuel alignment for GTG
What are fuel pumps rated at? - (answer)Slow 36 GPM
Fast 72 GPM
105 P S I
What is the fuel pump relief valve set to? - (answer)130 P S I G
Describe the fuel unloader valve. - (answer)Regulates pressure back to the tank.
Fails shut.
LP air operated.
Designed to maintain fuel pressure at 35 P S I G.
When do you bypass the fuel heater? - (answer)In an emergency suction can be taken from storage tank
bypassing the fuel heater and purifier.
, ENGINEERING DUTY OFFICER (EDO) EXAM 2025 QUESTIONS AND ANSWERS
If JP-5 is to be used.
The fuel oil heater maintains header temp at what temperature? - (answer)85 degrees F.
What does the fuel pre filter do? - (answer)Remove sediment.
What is the max DP for the fuel pre filter? - (answer)18.
What is quick heat? - (answer)This is where the lube oil purification system to include heater to both
purify and heat the main lube oil system to 90 degrees.
When would you use quick heat? - (answer)During very cold weather or when an emergency underway
must occur.
What are the temperatures for the chill box and freeze box? - (answer)Chill box is 33 to 36 degrees.
Freeze box is 0 to 5 degrees.
True or false. Refueling operations are controlled from the oil test lab. - (answer)True.
An Oil king Assistant will be stationed at the deck riser to open/close the fill valve and to take what
required fuel samples? - (answer)Initial, midpoint, end samples, and every 15 minutes.
Who will perform a safety brief for transferring lube oil and fuel oil in port from pier to ship? -
(answer)EDO
During in port fueling flow rates shall not exceed how many gallons per minute? - (answer)400
