2a353 Vol 3 (In Work)

59 Questions | By Flyboy1 | Updated: Mar 22, 2022 | Attempts: 60

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This is a study guide for Vol 3

Questions and Answers

1.

What two conditions cause the EPU to automatically operate?
- A.
  
  EPU switch to ON & battery switch to EMERG
- B.
  
  Loss of engine generator & low battery charge
- C.
  
  Loss of system-A & system-B hydraulic power
- D.
  
  Failure of the main/standby generators & loss of system-A and system-B hydraulic power
2.

What hydraulic system does the EPU hydraulic pump provide pressure to?
- A.
  
  Hydraulic System-A only
- B.
  
  Hydraulic System-A & System-B
- C.
  
  Hydraulic System-B only
- D.
  
  Utility Hydraulic System
3.

Which EPU operational mode is intended to be a ground functional test only and is not utilized for in-flight emergencies?
- A.
  
  Normal
- B.
  
  Bleed air
- C.
  
  EPU/GEN
- D.
  
  Augment
4.

What is the main electrical component of the EPU system?
- A.
  
  EPU Speed controller
- B.
  
  EPU nitrogen valve
- C.
  
  EPU emergency hydraulic pump
- D.
  
  EPU hydrazine fuel
5.

How many pounds does the Hydrazine tank hold?
- A.
  
  36 lbs
- B.
  
  46 lbs
- C.
  
  56 lbs
- D.
  
  66 lbs
6.

What does the EPU FIRED indicator display once the EPU is fired?
- A.
  
  A "red" button indicator
- B.
  
  Six equally spaced silver and black triangles
- C.
  
  Six equally spaced gray and black triangles
- D.
  
  The word "FIRED" appears in the window
7.

What position of the EPU mode switch arms the EPU system and makes it ready for automatic operation should the need arise?
- A.
  
  NORM
- B.
  
  Bleed Air
- C.
  
  EPU/GEN
- D.
  
  Augment
8.

What does an amber AIR light on the EPU control panel indicate?
- A.
  
  Bleed air is being commanded by the electrponic speed controller to power the EPU
- B.
  
  The nitrogen valve has opened and is bled pressure into the Hydrazine tank
- C.
  
  The decomposition chamber has reached 1,200F
- D.
  
  A failure of the bleed air speed control and shutoff valve
9.

What is a Dewar flask?
- A.
  
  Another name for the LOX converter
- B.
  
  The smallest part of the LOX converter
- C.
  
  A double-walled container in the LOX converter that has air evacuated from the space between the walls
- D.
  
  The junction between the LOX converter and the regulator
10.

What would cause frost to form on the LOX warm-up coil?
- A.
  
  A leak in the Dewar flask
- B.
  
  A leak in the LOX system
- C.
  
  Failure of the LOX relief valve
- D.
  
  Failure of the oxygen heat exchanger
11.

What LOX system component has a spring-loaded check valve that prevents reverse flow of liquid oxygen from the container when you are servicing the converter?
- A.
  
  Oxygen relief valve
- B.
  
  Oxygen fill valve
- C.
  
  Oxygen regulator
- D.
  
  Oxygen distribution manifold
12.

Where is the emergency oxygen bottle located?
- A.
  
  Left side of the ejection seat
- B.
  
  Right side of the ejection seat
- C.
  
  Attached to the right control panel
- D.
  
  Attached to the left control panel
13.

What provides a path from the LOX indicating probes to the quantity indicator?
- A.
  
  Quantity test relay
- B.
  
  Probes
- C.
  
  Coaxial cables
- D.
  
  Test switch
14.

Where is the oxygen low-pressure switch located?
- A.
  
  In the forward right console crew comparment matrix assembly
- B.
  
  In the vacuum space of the converter's Dewar flask
- C.
  
  On the oxygen system TEST panel
- D.
  
  Connected to the gaseous oxygen supply tube between the forward OXY FLOW indicator and the forward oxygen regulator
15.

At what quantity level does the OXY LOW warning light illuminate?
- A.
  
  Less than 0.1 liters
- B.
  
  Less than 0.3 liters
- C.
  
  Less than 0.5 liters
- D.
  
  Less than 0.9 liters
16.

What happens when you close the oxygen quantity test switch?
- A.
  
  The indicator drives towards the empty end of the dial
- B.
  
  The indicator rotates CCW
- C.
  
  The indicator rotates clockwise
- D.
  
  The indicator falls to zero and stops
17.

What would cause the LOX quantity indicator to rotate counter-clockwise?
- A.
  
  Pressing the oxygen test switch
- B.
  
  Loss of electrical power
- C.
  
  A shorted probe (plate to plate)
- D.
  
  A short-to-ground in the high voltage side of the circuit
18.

What causes clockwise rotation of the indicator?
- A.
  
  Pressing the oxygen test switch
- B.
  
  Loss of electrical power
- C.
  
  A shorted probe (plate to plate)
- D.
  
  A short-to-ground in the high voltage side of the circuit
19.

Where are the overheat sensing elements located?
- A.
  
  Throughout the engine bay and engine nacelles
- B.
  
  Throughout the engine bay, engine nacelles, ECS bay, EPU bay and bleed air ducts
- C.
  
  Throughout the engine nacelles, ECS bay, EPU bay and the bleed air ducts
- D.
  
  Throughout the engine bay and bleed air ducts
20.

How are the fire detection set sensing elements grounded?
- A.
  
  Each element grounds to the Fire Detection Unit
- B.
  
  Each element grounds to the aircarft frame by the element connectors
- C.
  
  Each element grounds to the airframe be electrical terminal ends
- D.
  
  Each element grounds to aircraft structural ribs and stringers
21.

What is the alarm temperature of the fire detection set sensing elements?
- A.
  
  765 degrees F
- B.
  
  755 degrees F
- C.
  
  745 degrees F
- D.
  
  775 degrees F
22.

How long can the fire detection set cable assembly withstand a temperature of 2000 degrees F?
- A.
  
  1 minute
- B.
  
  5 minutes
- C.
  
  10 minutes
- D.
  
  15 minuntes
23.

How do you test the integrity of the sensing elements?
- A.
  
  Using the T-handle push-to-test switch
- B.
  
  Using the Master Caution push-to-test switch
- C.
  
  Using the fire detection test set
- D.
  
  Using the fire detection test switch
24.

How many loops of the control unit circuitry must detect a fire or overheat condition before a warning light illuminates in the cockpit?
- A.
  
  Only one loop of the control unit circuitry is required to detect a fire/overheat condition
- B.
  
  Both loops of the control unit circuitry must detect a fire/overheat condition
- C.
  
  Only one loop must sense an overheat condition above 575 degrees F
- D.
  
  Only one loop must sense an overheat condition above 765 degrees F
25.

How much Halon does the fuel interting system reservoir hold?
- A.
  
  11 pounds
- B.
  
  13 pounds
- C.
  
  15 pounds
- D.
  
  17 pounds