AVIA 338 TEST #2 UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS
Question:
1. Pneumatic Systems
Answer:
A system that uses gas or pressurized air to move cylinders, motors, and other
mechanical parts
Question:
2. What is a Bleed Air system
Answer:
extracts air from the engine or APU and distributes it through a heat exchange,
valves, ducts and regulators to then be distributed to other systems
Question:
3. How does the bleed air system function?
Answer:
Taken from the compressor or APU. If both engines are on, they both work. If one
fails, a new valve opens, and still supplies the bleed air to those users. Overall
would reduce thrust and efficiency. APU is used as standby
Question:
4. Which systems require bleed air?
Answer:
-gyros
-Door seals
-Pump or motor power
-anti-icing/de-icing
-Fluid pressurization
-Engine starter
-Pressurization
-heating/cooling
Question:
5. Where can you get pneumatic pressure?
Answer:
Engine, APU or ground cart
, Question:
6. What source of bleed air is used before start?
Answer:
APU (when engines aren't running) or ground cart
Question:
7. What are the dangers of the pneumatic system?
Answer:
theres a high volume drawn from engines, high temps (600-800 F), Starter valve
overspeed
Question:
8. How is the bleed air system monitored?
Answer:
Both temp and pressure gauges. If they become too hot or too high/too low
pressure the bleed air computer will automatically shut off to prevent damage to
other systems.
Question:
9. Whats a check valve?
Answer:
used to restrict pneumatic flow in certain areas to one direction
Question:
10. Whats a isolation valve?
Answer:
Manual or automatic, allow separation of bleed systems in the event of leaks or
other failures
Question:
11. Whats ethylvinylacetate? (EVA)
Answer:
a type of material used for tubing along the bleed air lines. It will melt when leaks
occur.
CORRECT ANSWERS
Question:
1. Pneumatic Systems
Answer:
A system that uses gas or pressurized air to move cylinders, motors, and other
mechanical parts
Question:
2. What is a Bleed Air system
Answer:
extracts air from the engine or APU and distributes it through a heat exchange,
valves, ducts and regulators to then be distributed to other systems
Question:
3. How does the bleed air system function?
Answer:
Taken from the compressor or APU. If both engines are on, they both work. If one
fails, a new valve opens, and still supplies the bleed air to those users. Overall
would reduce thrust and efficiency. APU is used as standby
Question:
4. Which systems require bleed air?
Answer:
-gyros
-Door seals
-Pump or motor power
-anti-icing/de-icing
-Fluid pressurization
-Engine starter
-Pressurization
-heating/cooling
Question:
5. Where can you get pneumatic pressure?
Answer:
Engine, APU or ground cart
, Question:
6. What source of bleed air is used before start?
Answer:
APU (when engines aren't running) or ground cart
Question:
7. What are the dangers of the pneumatic system?
Answer:
theres a high volume drawn from engines, high temps (600-800 F), Starter valve
overspeed
Question:
8. How is the bleed air system monitored?
Answer:
Both temp and pressure gauges. If they become too hot or too high/too low
pressure the bleed air computer will automatically shut off to prevent damage to
other systems.
Question:
9. Whats a check valve?
Answer:
used to restrict pneumatic flow in certain areas to one direction
Question:
10. Whats a isolation valve?
Answer:
Manual or automatic, allow separation of bleed systems in the event of leaks or
other failures
Question:
11. Whats ethylvinylacetate? (EVA)
Answer:
a type of material used for tubing along the bleed air lines. It will melt when leaks
occur.
