Propulsion Turbines
This part of a steam turbine directs high-pressure steam onto the blades.
What are nozzles?
A steam-driven generator converts this form of energy into electricity.
What is thermal energy?
WHAT IS THE SE MISUSE/ABUSE FORM?
OPNAV 4790/108
This process allows heat exchangers to transfer thermal energy between fluids without direct contact.
What is conduction?
Modern naval refrigeration systems commonly use this environmentally friendly refrigerant.
What is R-134a?
If this system fails, turbine bearings can overheat and seize within minutes.
What is the lube oil system?
Before working on a steam-driven generator, you must perform this safety procedure to prevent accidental startup.
What is tagging out the generator?
WHO MANAGES THE QA DIVISION?
QAO
This component removes non-condensable gases from a ship’s condenser.
What is the air ejector?
This component removes heat from the refrigerant, converting it from a gas to a liquid.
What is the condenser?
This system provides continuous lubrication and cooling to turbine bearings.
What is the main lube oil system?
This device maintains a constant voltage output from the generator.
What is the voltage regulator?
How long do you have to submit a Hazardous Material Report (HMR)?
What is the preferred method of submitting the report?
must be submitted within 24 hours of discovery;
Joint Deficiency Reporting System (JDRS) website
A decrease in vacuum pressure in the main condenser can indicate a failure in this system.
What is the air ejector system?
This valve controls the flow of refrigerant into the evaporator coil.
What is the thermostatic expansion valve?
The speed of a turbine is regulated by adjusting these valves.
What are nozzle control valves?
Steam-driven generators often use this system to keep windings from overheating.
What is an air or water cooling system?
What form number is the Support Equipment History Record?
How many sections is it?
What section is Preservation/Depreservation logged?
OPNAV 4790/51; 6 total sections; Section III
This type of test is used to check for leaks in heat exchangers.
What is a hydrostatic test?
The refrigeration cycle relies on this principle to transfer heat from inside a compartment to the outside.
What is the phase change of the refrigerant?
This type of naval propulsion turbine has a high-pressure (HP) and a low-pressure (LP) element in separate casings.
What is a Type II-A straight-through turbine?
Excessive vibration in a generator can be caused by this alignment issue.
What is rotor imbalance or misalignment?
What programs does QA manage? Name 5 of the 7
a. Audit
b. Naval Aviation Maintenance Discrepancy Reporting Program (NAMDRP)
c. Technical Data (TD)
d. Safety
e. (O-Level) Vibration Analysis
f. SE Misuse/Abuse Reporting
g. Aircraft Confined Space Program
The buildup of this unwanted material inside heat exchanger tubes reduces heat transfer efficiency.
What is scaling or fouling?
This component removes moisture from the refrigeration system to prevent ice buildup.
What is the dehydrator or filter drier?