Jet Aircraft Fuel and Fuel systems and Jet Aircraft Engine Lubrication Systems
What valve is opened by turning it 90 degrees clockwise with a screwdriver?
What valve is used for the aft boost pump drain?
Which of the following is NOT variable sensed by the fuel control?
Low-pressure compressor speed
From what pump does the fuel control get its high-pressure fuel?
Engine-driven fuel pump
What valve maintains a constant pressure differential across the throttle valve?
A constant fuel pressure drop is maintained across the throttle valve by using a computing system to position which of the following components?
The contoured plunger
Which of the following components is the last to act upon metered fuel before it leaves the fuel control?
The minimum pressure and shutoff valve
Burner can pressure(s)
P (subscript B)
High-pressure compressor rotor speed
N (subscript 2)
Compressor inlet temperature
T (subscript T2)
The force proportional to P (subscript B) is sent to the multiplying lever through which of the following components?
A set of rollers
The equilibrium of the multiplying lever is upset by by what variables?
W(subscript F)/P (subscript B) or P (subscript B)
Which of the following components returns the multiplying lever to its equilibrium position?
What element in the fuel control senses burner pressure with respect to ambient pressure?
Burner pressure limiter
The flyweight force in the speed-sensing governor varies, and the pilot valve is positioned to meter either low- or high-pressure fuel to the speed servo piston. At what time does this action occur?
When high-pressure compressor rotor speed changes
What are the temperature-sensing bellows and servo assembly connected to through a lever-and-yoke assembly?
If the primary control system fails, the manual system may be engaged by operating a switch in the cockpit to energize which of the following components?
Manual transfer solenoid
The danger of hot starts and after fires is reduced by a pressure differential combustion chamber drain valve that opens under which of the following circumstances?
Valve spring force is greater than the pressure within the chamber
Which of the following parts is peculiar to the modern jet engine fuel nozzle?
Most jet engines today use which of the following types of fuel nozzle?
By what means are the fuel selector valves controlled?
Electrically or manually
What device allows you to override a defective fuel selecor valve motor?
cable and drum
What type of filter is especially valuable for use between the fuel tank and engine?
The filters used to remove minute particles of contamination are which of the following types?
Microfilter and wafer screen
What type of filter is used when filtering action is NOT critical?
What are the two general groups that pumps are identified by?
Constant displacement and variable displacement
When variable displacement engine-driven fuel pumps are used, two pumps are connected in parallel for which of the following reasons?
To provide a broader safety margin during takeoff and landing
What device maintains constant pressure in the contant pressure tupe of engine-driven fuel pump?
A spring-loaded pressure relief valve
For additional information on the principles and operations of fluid power systems and components, you should refer to NAVEDTRA 129624, Fluid power TRAMAN.
Because aircraft fuels are extremely hazardous, maintenance personnel must follow which of the following precautions?
Avoid breathing vapors or prolonged contact with fuels?
Know the symptoms and first aid procedures for poisoning due to fuel vapor inhalation?
Be aware and follow all safety procedures during aircraft maintenance?
All of the above
Fuel leaks are sometimes difficult to locate because of the arrangement of lines and components in an aircraft fuel system. What are the first steps to isolate the leak?
Review past discrepancies and perform visual inspections
The Navy uses a red dye in JP-5 fuel tanks. What is the purpose of this dye?
To detect a leak in an aircraft fuel tank, you should add a 2-ounce can of liquid red dye to what total quanitity of fuel?
100 gallons of fuel
Which of the following actions do you follow if you find conflicting information between your aircraft maintenance manuals and NA 01-1A-35?
Follow the procedures in NA 01-1A-35
NA 01-1A-35 contains information on which of the following areas?
Aircraft fuel cell maintenance?
Required safety equipment for fuel cell maintenance?
Specific type aircraft fuel cell maintence?
Both 1 and 2 above
Removing fuel vapors from the aircraft cell/tank
the process of removing residual fuel from aircraft fuel cells
Removing fuel from the aircraft cell/tank
Which of the following types of maintenance may be performed during aircraft fueling/defueling operations?
No maintenance is permitted
What agent is used for purging the fuel cells?
Which of the following steps should you take to prevent fuel cell contamination during maintenance?
Cap or plug all fuel lines
When removing a fuel cell, what, if anythingk should be done to the sharp edges in the cell cavity?
Tape them over
When removing a fuel cell, if it becomes necessary to pry on rubber fittings or on the cell, which of the following tools should be used?
If fuel cell maintenance time exceeds 72 hours, the cell interior walls must be coated with which of the following items before closing?
Grade 1010 oil
To prevent cracking of the fuel cells during cold weather folding, cells should be warmed to what temperature?
60 degrees fahrenheit
When installing a fuel cell, what should be applied to the outer surface of the cell and cavity to aid in moving the cell into position?
Which, if any, of the following types of sealing compound may be used on rubber fuel cell fittings?
Buns N rubber compound?
Which of the following is one of the major causes for a newly installed fuel cell to leak?
The improper torquing of bolts and fittings
After fuel cell installation, which of the following methods is recommended to check the system for leaks?
Why is the main fuel strainer installed in the lowest point in the fuel system?
To trap water
Before any maintenance is performed on the D-704 buddystore, which of the following actions must be taken?
The hose jettison cartridge must be removed
Which of the following components must you inspect for stress cracking and corrosion when rigging and adjusting fuel controls, selectors, and shutoff valves?
Rods and bell cranks where the bearings are staked
Which of the following conditions should be checked prior to adjusting the engine power controls?
Power lever is free from binding and the controls have FULL THROW at the console
High cable tension may result in sluggishness or insufficient travel of the controls.
Which of the following operational factors determines the grade of lubricating oils used in engines?
Which of the following types of lubricants are LEAST useful at high temperatures?
animal and vegetable oils
What is the base or origin of synthetic oils?
Which of the following oils is the primary type of oil used in Navy and Marine Corps turbine engines?
What function performed by oil depends on circulation of the lubricant?
How many digits are in the grade number that identifies an aircraft engine lubricating oil?
In the military grade number 1080, what does the 1 identify?