Powerplant Flashcards
The variable geometry (VG) system varies the position of the inlet guide vanes and the stator vanes on stages:
1 to 4
The cf34-8c5, with APR, has a thrust rating of:
13,560-14,750 lbs
What engine model is equipped on the crj-900 series of aircraft?
CF34-8C5
During normal operation, the data concentrator units monitor:
N1, ITT, N2, oil pressure, temperature, engine vibration, and fuel flow
10th stage bleed air is used for:
Air Conditioning
The engines may be started using the APU, ground source or engine cross bleed:
True
Cross bleed air starts require that:
Operating engine to achieve 42 psi
IGN B is powered from
Battery Bus
Ignition A
AC Bus
Ignition B
DC Battery Bus
Ignition cut-out occurs at:
50% N2
Refilling of the oil system is provided by a replenishment tank:
Located in the aft equipment bay
Engine oil is cooled by:
Fuel/ oil heat exchanger because fuel is cold & oil is hot
80% of engine thrust is generated by?
Bypass Air
How are the CRJ engines protected from compressor stall and surge protection?
Variable geometric vanes
Under what conditions can the FADEC be set to Flex Thrust?
All of the above : thrust levers at idle or shutoff detects, WOW for at least one minute, assumed temperature is greater than actual outside air temperature, & airspeed is less than 65 knots
When will One Engine Operational thrust be activated?
N1 mismatch 15% RPM
The left engine is the master engine for
N1 & N2 sync
The primary thrust setting reference is:
N1
With wing anti-ice on, the N2 rpm indicators will:
Turn white from 0 to 77%
Pressing the left engine START switch light
Opens the left bleed air start valve and the isolation valve
FLEX N1 is computed by the
FMS computer
