Volume 2 Unit Review Exercises Aircraft Fuel System
Try your hand at another one of our many aircraft unit review exercises, as we put you to the test against a series of questions regarding Aircraft Fuel Systems. How do they work? You tell us!
- 1.1. (201) What type of pumps is used for engine feed in the FWD and AFT reservoir tanks of a fighter aircraft?
- A.
Dual-impeller, turbine-driven.
- B.
Single-impeller, turbine-driven.
- C.
Dual-impeller, electrically driven.
- D.
Single-impeller, electrically driven
- 2.2. (201) The crossfeed valve on a fighter aircraft is a
- A.
Cable-operated gate valve.
- B.
Motor-operated butterfly valve.
- C.
Fuel pressure-operated gate valve
- D.
Solenoid-operated butterfly valve
- 3.3. (201) On a fighter aircraft fuel system, a thermally-actuated valve in the heat exchanger outlet prevents fuel from exceeding
- A.
140ºF
- B.
160ºF.
- C.
180ºF
- D.
200ºF
- 4.4. (202) To use body tank fuel to feed the engines on a tanker aircraft, the
- A.
Air refueling pumps must be operated.
- B.
Main tank pumps must be operated.
- C.
Alternate pumps must be operated
- D.
Override pumps must be operated
- 5.5. (202) To feed all engines from the center wing tank on a tanker aircraft, the
- A.
Gravity feed valve must be opened.
- B.
Override wing valves must be opened.
- C.
Tank to manifold valves must be opened
- D.
Air refueling to engine manifold valves must be opened
- 6.6. (203) The output pressure and the flow ratings of a centrifugal pump are greater than the amount the system needs in order to
- A.
Provide an ample supply of fuel in case of a single pump failure.
- B.
Prevent fuel boiling and evaporation in the wing tanks at high altitudes.
- C.
Provide fuel to the engines during negative Gs or inverted flight conditions.
- D.
Prevent the reverse flow of fuel from a pump with a greater pressure output.
- 7.7. (203) When fuel supply is required during negative gravity conditions,
- A.
A rotary-vane centrifugal pump is used.
- B.
A dual-impeller centrifugal pump is used.
- C.
An in-line ejector centrifugal pump is used.
- D.
A top-mounted pump centrifugal pump is used.
- 8.8. (203) What feature prevents foreign objects from holding the bypass valve open in a dual-impeller pump?
- A.
A two-way check valve.
- B.
A one-way check valve.
- C.
An impeller screen.
- D.
An inlet screen.
- 9.9. (203) Which of the following is not an advantage of the quick change electrically drive fuel pump?
- A.
Requires special tools to install.
- B.
It isn’t possible to install the wrong pump.
- C.
Shortens the time required for pump changes.
- D.
Does not require either physically entering or completely defueling the tank.
- 10.10. (204) The arrow stamped on the body of a check valve indicates the
- A.
Direction of fuel flow.
- B.
Direction of restricted flow.
- C.
Location of the drilled hole in the valve.
- D.
Location of the manufacturer’s data block.
- 11.11. (204) The flapper on a flapper-type check valve is opened by
- A.
Spring pressure.
- B.
Hydromechanical action.
- C.
Gravity flow or pump pressure.
- D.
An electrical impulse to the flapper mechanism.
- 12.12. (204) What shutoff valve cannot withstand extreme pressures?
- A.
Disc.
- B.
Butterfly.
- C.
Sliding gate.
- D.
Rotary plug.
- 13.13. (204) What feature prevents excessive pressure from building up in trapped lines or within the body of a sliding gate valve?
- A.
Pressure relief valves
- B.
Thermal relief valves.
- C.
One-way check valves.
- D.
Spring-loaded check valves.
- 14.14. (204) What type of seal is found between the disc and valve body on a disc-type valve?
- A.
V-ring.
- B.
O-ring
- C.
Gasket.
- D.
Metal-to-metal
- 15.15. (205) The best method for troubleshooting a fighter engine feed system component you suspect of leaking is to
- A.
Operate the component while looking for leaks.
- B.
Pressurize the manifold with fuel and look for leaks
- C.
Stand-test with fuel for 30 minutes and look for leaks
- D.
Pressurize the manifold with air and listen for leaks.
- 16.16. (205) You are troubleshooting a boost pump problem on a fighter aircraft. To do this properly, your first step is to check for
- A.
Power to the boost pump.
- B.
A pressure switch reading
- C.
Continuity of the pressure switch.
- D.
A direct pressure reading of the pump.
- 17.17. (206) On a tanker aircraft, where must fuel be routed in order to feed any engine from any main tank?
- A.
Forward body tank.
- B.
Crossfeed manifold.
- C.
Transfer manifold.
- D.
Center wing tank.
- 18.18. (207) You are troubleshooting a malfunction of the crossfeed system on a tanker aircraft when you determine there is no pressure available to route fuel to the crossfeed manifold. The most probable cause of this malfunction is
- A.
A stuck open check valve.
- B.
A malfunctioning boost pump.
- C.
An inoperative pressure transmitter
- D.
Foreign object damage stuck in a shutoff valve.
- 19.19. (208) The purpose of the power transfer method on a fighter aircraft is to
- A.
Pressurize the tanks only.
- B.
Augment fuel transfer only.
- C.
Pressurize and scavenge the tanks.
- D.
Augment fuel transfer and scavenge the tanks
- 20.20. (208) How many pumps are used in the power transfer system on a fighter aircraft?
- A.
Two.
- B.
Three.
- C.
Four
- D.
Six.
- 21.21. (208) On a fighter aircraft, what type of pumps are the scavenge pumps and where are they located?
- A.
Ejector-type; located in the F–2 tank
- B.
Turbine-type; located in the F–2 tank.
- C.
Ejector-type; located in the F–1 tank.
- D.
Turbine-type; located in the F–1 tank.
- 22.22. (208) On a fighter aircraft,
- A.
The external centerline tank will transfer first.
- B.
The left wing external tank will transfer first.
- C.
The right wing external tank will transfer first.
- D.
Both wing external tanks will transfer first.
- 23.23. (209) You are troubleshooting a problem on a fighter aircraft. You find that none of the external tanks transferred fuel with the select switch in NORM position; however, the external wing tanks did transfer fuel with the select switch in WING FIRST position. The most probable cause of this malfunction is the
- A.
Inoperative wing float valve.
- B.
External transfer shutoff valve is bad.
- C.
External vent and pressurization valve is bad.
- D.
Centerline refuel/transfer valve is inoperative.
- 24.24. (209) You are troubleshooting a problem on a fighter aircraft when you discover that none of the external tanks transfer fuel, regardless of the switch positions. The most probable cause of this malfunction is the
- A.
Transfer pumps are inoperative.
- B.
Refuel/transfer valves are inoperative.
- C.
Vent and pressurization valve is inoperative.
- D.
Centerline tank manual shutoff valve is inoperative.
- 25.25. (210) The fuel level control valve on a cargo aircraft is operated
- A.
Hydromechanically and controlled by fuel pressure.
- B.
Hydromechanically and controlled by a solenoid.
- C.
And controlled hydromechanically.
- D.
And controlled by a solenoid.
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