1. The engines powering the 20 series
Learjets are defined as:
A. Single-spool, reverse flow turbojets
B. Twin-spool, straight flow turbojets
C. Single-spool, axial-flow turbojets
D. Twin-spool, centrifugal turbojets
2. The function of the variable geometry
system is to:
A. Prevent compressor stalls and surges
B. Offload the turbines at high altitudes
C. Provide laminar airflow through the
compressor
D. Limit combustion chamber pressure
3. The power source required for engine
oil pressure gages is supplied by:
A. A battery-operated power pack
B. The pilot’s 115-volt AC bus
C. Resistance bulbs at the oil pump outlet
D. The 26-VAC system
4. The primary thrust indicator for the
CJ610 engine is:
A. EGT
B. Fuel flow
C. Engine pressure ratio (EPR)
D. Rpm
5. During start, ignition occurs when the:
A. Rpm indicates 10%
B. Thrust lever is moved from the CUT-
OFF position
C. Start GEN switch is moved to the
START position
D. Generator magnetic pickups sense 8%
rpm
6. If fuel flow, EGT, and EPR are normal
for the thrust setting but oil pressure and
rpm are indicating zero, the probable
cause is:
A. A sheared oil pump shaft
B. Loss of the electrical power source
C. An open circuit breaker
D. A faulty oil pressure switch
7-21
FOR TRAINING PURPOSES ONLY
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