Coast Guard QMED Oiler Exam
Exam Coverage – 10 Most Tested Areas
1. Lubrication Systems & Principles – Oil properties, viscosity,
lubrication methods, oil coolers, filters, and purifiers.
2. Pumps, Piping, Fittings & Valves – Centrifugal, gear,
reciprocating pumps; valve types; strainers; gaskets; expansion
joints.
3. Diesel Engine Operation & Maintenance – Starting systems,
cooling water, fuel systems, exhaust conditions, turning gear,
and bearings.
4. Auxiliary Machinery & Heat Exchangers – Boilers, economizers,
purifiers, air compressors, refrigeration, and steering gear.
,5. Bilge, Ballast & Pollution Prevention – Bilge systems, oily water
separators, cofferdams, environmental regulations, and disposal
procedures.
6. Safety, Firefighting & Emergency Equipment – Fire classes,
extinguishers, SCBA, lockout/tagout, PPE, and confined space
entry.
7. Ship Construction & Stability – Hull terminology, strakes, double
bottoms, frames, stability principles, and free surface effect.
8. Basic Maintenance & Hand Tools – Bolt and thread
identification, gasket making, bearing removal, and measuring
instruments.
9. Watchkeeping Duties & Instrumentation – Pressure gauges,
thermometers, flow meters, logbook entries, and equipment
, monitoring.
10. Elementary First Aid & Survival – CPR, bleeding control, burns,
hypothermia, lifeboat equipment, and abandon ship procedures.
Coast Guard QMED Oiler Exam
1. The main purpose of the jacket water system in a marine diesel
engine is to:
A. Remove heat from the cylinders to maintain proper operating
temperature
B. Lubricate the pistons and cylinder walls during operation
, C. Heat the fuel oil before it enters the injection system
D. Vent exhaust gases from the combustion chamber
Correct Answer: A
Rationale: The jacket water system circulates freshwater around
the cylinder liners and cylinder heads to absorb heat generated
during combustion, maintaining the engine at its designed
operating temperature range.
2. Which type of pump is most commonly used for fuel oil
transfer service aboard ships because of its ability to handle
viscous fluids?
Exam Coverage – 10 Most Tested Areas
1. Lubrication Systems & Principles – Oil properties, viscosity,
lubrication methods, oil coolers, filters, and purifiers.
2. Pumps, Piping, Fittings & Valves – Centrifugal, gear,
reciprocating pumps; valve types; strainers; gaskets; expansion
joints.
3. Diesel Engine Operation & Maintenance – Starting systems,
cooling water, fuel systems, exhaust conditions, turning gear,
and bearings.
4. Auxiliary Machinery & Heat Exchangers – Boilers, economizers,
purifiers, air compressors, refrigeration, and steering gear.
,5. Bilge, Ballast & Pollution Prevention – Bilge systems, oily water
separators, cofferdams, environmental regulations, and disposal
procedures.
6. Safety, Firefighting & Emergency Equipment – Fire classes,
extinguishers, SCBA, lockout/tagout, PPE, and confined space
entry.
7. Ship Construction & Stability – Hull terminology, strakes, double
bottoms, frames, stability principles, and free surface effect.
8. Basic Maintenance & Hand Tools – Bolt and thread
identification, gasket making, bearing removal, and measuring
instruments.
9. Watchkeeping Duties & Instrumentation – Pressure gauges,
thermometers, flow meters, logbook entries, and equipment
, monitoring.
10. Elementary First Aid & Survival – CPR, bleeding control, burns,
hypothermia, lifeboat equipment, and abandon ship procedures.
Coast Guard QMED Oiler Exam
1. The main purpose of the jacket water system in a marine diesel
engine is to:
A. Remove heat from the cylinders to maintain proper operating
temperature
B. Lubricate the pistons and cylinder walls during operation
, C. Heat the fuel oil before it enters the injection system
D. Vent exhaust gases from the combustion chamber
Correct Answer: A
Rationale: The jacket water system circulates freshwater around
the cylinder liners and cylinder heads to absorb heat generated
during combustion, maintaining the engine at its designed
operating temperature range.
2. Which type of pump is most commonly used for fuel oil
transfer service aboard ships because of its ability to handle
viscous fluids?
