1. Diffuser is located at , Purpose is _ .
- Compressor exit, to give high pressure prior to combustion chamber
2. According to Brayton cycle, what does occur within Combustion chamber
- Pressure drop 3%
3. The N1 section in a twin-spool turbo-fan engine
- Includes the front stage fan
4. The HP turbines in a twin-spool jet engine
- Drives the N2 compressor
5. Sir Isaac Newton states second law as
- The acceleration is directly proportional to the force and inversely proportion...
1. Diffuser is located at , Purpose is _ .
- Compressor exit, to give high pressure prior to combustion chamber
2. According to Brayton cycle, what does occur within Combustion chamber
- Pressure drop 3%
3. The N1 section in a twin-spool turbo-fan engine
- Includes the front stage fan
4. The HP turbines in a twin-spool jet engine
- Drives the N2 compressor
5. Sir Isaac Newton states second law as
- The acceleration is directly proportional to the force and inversely proportional to the mass.
6. The Pratt&Whitney JT8D engine compressor anti-stall system, best describes
(81% Ʋ¸° ¹®Á¦)
- Compressor P across N1 comp to protect against N2 comp stalls
- Uses Ps4 as muscle/actuating air to reposition the bleed valves
(½ÃÇè¿¡¼± Ps3·Î ³ª¿È)
7. The Pratt&Whitney JT8D engine compressor anti-stall uses
- Pt2 and Ps3 sensing pressure to ctrl VBV¡¯s
8. If the venturi vent was restricted, what effect would this have on the against anti-stall system
- Bleed valve will remai¡¦(»ý·«)
n closed
ÇØ¼³: Ps3°¡ ¸·È÷¸é¼ ¹ØÀ¸·Î ´õ ¹Ð¾î³¿.
High P go to bleed line -` block bleed valve
9. EPR is best described at
- Measurement engine thrust output
10. EPR system operated by
- Compares engine inlet to P engine outlet
11. During engine run test, you hear large popping sound and see EGT running high temperature than has to be normal. What action should you do for this
- keep the engine running but retard the throttle back to idle speed
OilÀÌ ¾ø°Å³ª, ºÒÀÌ ³ª¸é ¹Ù·Î ²ö´Ù.
12. Which component does not part of ignition system
a. High voltage ignition leads
b. High tension magnetos
c. High voltage Igniters
d. Ignition exciters
13. How long should you leave ignition system after engine shuts off
a. 5 mins
b. 10 mins
c. 30 mins
d. As the manufacturer recommends
14. Diff P = 2.5 psi, Exhaust nozzle Dia= 5ft, F= (90% Ʋ¸° ¹®Á¦)
- F = PA, where Diff P=2.5psi
A= ( D= 5 ft!!, You have to change this into inches!!!! )
= 5 x 12 = 60 inch
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