Chapter 1 Self Test Flashcards
(201) 2. What type of battery is used in the ALCM?
Thermal battery
(201) 1. What is the purpose of the ALCM electrical power system?
To supply power to the missile components via the pulse load (PL), constant load (CL), and main busses during all phases of operation.
(201) 3. Describe how the battery output voltage is generated.
The burning firetrack melts the electrolyte, which reacts with the cell plates to generate 28-VDC PL power.
(201) 4. How is an expended battery identified?
The battery case is coded with a temperature-sensitive paint. A black color indicates an expended battery.
(201) 5. What keeps the generator/regulator cool during free-flight?
Ram air
(201) 6. What condition must the generator be in during the engine startup sequence?
“unloaded”
(201) 7. What is the function of the J-box?
To receive carrier power or air vehicle power, isolate that power, and distribute it to the missile equipment.
(201) 8. The UEA serves what function or purpose?
To provide electrical interface to the pylon/launcher (or ESTS during testing); distribution of power and signals to other components; separation of signal categories; and termination for cable shielding.
(201) 9. What purpose does the rotary switch serve after aircraft power is applied to the missile?
Electrical isolation between the power source and EEDs and warhead until launch.
(201) 10. What must be done to open the rotary switch contacts?
By inserting the detent pin into the switch
(201) 11. During levels I and II checkout, through what connector is main bus power supplied?
Through an ESTS/missile connection at the generator/voltage regulator located in the aft section of the missile.
(201) 12. Where is the AC power from the carrier aircraft primarily used in the missile?
By the INE and instrumentation kit heaters
(201) 13. Why is 28-VDC power from the carrier HYDTRs supplied to the missile during launch countdown?
For testing of the flight control actuators and fuel pump
(202) 1. What is the purpose of the SAF system?
To provide positive control over the warhead.
(202) 2. The operation of the rotary switch centers around what SAF function?
The power source isolation from the warhead.
(202) 3. What purpose does the UEA serve in the SAF system?
Provides power distribution, separation of signal categories, and shielding termination for EMP/EMI purposes.
(202) 4. How is the WAD safed?
Electrically by the aircraft or manually by inserting the safing pin.
(202) 5. What is significant about the positioning of the impact fuze in the nose cap assembly?
Due to the positioning of the impact fuze assembly in the nose cap assembly, it ensures the missile is only functional through angles of impact with the ground of 15-90 degrees.
(202) 6. What role does the INE play in the SAF system?
By sequencing the arming and fuzing commands, enable signals, and activate commands.
(202) 7. What is the purpose of the ESD words?
To ensure the proper sequencing of events takes place during missile free-flight before initiating the warhead arming commands.
(202) 8. How many events make up an ESD word?
A parent word plus 15 events
(202) 9. When do the SAFE/ARM switch contacts first close in the arming device?
The first time the arm enable command is first applied and remains closed throughout the remainder of the flight.
(202) 10. Why is an ALCM warhead arming maneuver required and how often does this event take place?
To ensure missile free-flight is established; twice.
(202) 11. What type of turns make up the arming maneuver?
Controlled “S” turns
(202) 12. How does the airburst terminal maneuver differ from the ground burst?
The INE commands the missile to climb prior to detonation in airburst where as the INE commands the missile to dive for ground burst.
(203) 1. What is the function of the UEA mechanical isolation valve?
Directs air within the missile depending on whether or not the valve is activated.
(203) 2. How does the turbo-compressor cool forward ECS air?
By expansion through the turbine section of the air-cycle machine.
(203) 3. What purpose is served by the check valve located in the turbo-compressor (air-cycle machine)?
Isolates the engine and aft ECS from the forward ECS during ground checkout and captive carry. Serves as a seal to prevent contamination or overpressurization of the aft ECS.
(203) 4. What is the purpose of the turbine bypass valve?
Ensures proper cooling of the INE
(203) 5. When does the forward ECS reach its maximum temperature?
During missile warm up only
(203) 6. Where does the forward ECS cooling air originate during missile free-flight?
The number 2 engine compressor bleed port
(203) 7. During free-flight, where does heated forward ECS air exit the missile?
Boattail annulus
(203) 8. What units are cooled by the aft ECS during engine free-light?
Generator/regulator and engine
(203) 9. Name the units that make up the aft ECS.
The engine inlet and air inlet temperature sensor-tube extension
(203) 10. What type of air is used for the aft ECS?
Ram air ducted from the engine inlet
(203) 11. What is passive cooling in terms of the ALCM missile?
Conduction or transfer of heat from one surface to another
(203) 12. What is the purpose of the engine desiccant system?
To hermetically seal the engine and provide a moisture-free environment.
(203) 13. Why is a plug provided with the engine inlet seal with the engine inlet seal?
To seal the ECS ram air inlet for ground and captive-carry phases of operation.
(203) 14. What seals the gap between the engine tailpipe and the desiccant assembly?
Desiccant seal
(203) 15. Why must one take care when handling the engine desiccant seal?
To prevent damage to the thin protective coating.
(203) 16. How is the desiccant assembly deployed at launch?
The INE fires dual-initiators in the expanding tube shearing the desiccant assembly pins, thus releasing the inner ring from the outer ring. Once the engine starts, it “blows” the desiccant assembly and inner right from the missile.
(204) 1. What is the main purpose of the FCAT system?
To provide fuel to the engine
(204) 2. How is the fuel tank pressurized?
By ducting engine low-pressure bleed air to TANK 1 through a bleed air-check valve and by a squib-operated air-supply valve.
(204) 3. What fuel cell is filled last during fueling?
TANK 1
(204) 4. Which fuel tank forms the payload bay or picklefork assembly?
TANK 1
(204) 5. What is the probability of fuel movement as fuel quantity decreases in the fuel cells?
Fuel movement increases drastically
(204) 6. What is the purpose of the negative “g” sumps?
To keep fuel around the screens during negative “g” maneuvers.
(204) 7. Why is magnetic coupling used between the pump and pump motor?
It eliminates the need for a dynamic seal, and, as a result, eliminates the possibility of fuel leakage from the pump assembly.
(204) 8. Why is an AC-type pump motor preferred over a DC-type motor?
It improves reliability and eliminates problems associated with DC brush-type motors.
(204) 9. What is the function of the fuel pump electronic unit?
It is nothing more than an inverter that converts 28-VDC missile power to 24-VAC, two-phase, 490-Hz power.