1. The diverter doors must be fully
closed to:
A. Operate the cockpit fan
B. Operate the Freon system
C. Operate the auxiliary heating system
D. Prevent loss of bleed-air conditioning
2. The valve used to control cabin temper-
ature is the:
A. Flow control valve
B. Damper valve (SNs 23-003 through
24-229)
C. Bypass H-valve
D. Outflow valve
3. When the aircraft is unpressurized
on the ground, air circulation is
provided by:
A. Ram air
B. The cockpit fan and the cabin
blower
C. Bleed-air system
D. Auxiliary defog system
4. The primary air conditioning in flight
is provided by:
A. Engine bleed air
B. The heat pump
C. The auxiliary heater
D. The Freon refrigeration system
5. When using the auxiliary heater, the
heated air blows out through the:
A. Conditioned air outlets
B. Louvered grille above the divan seat
C. Overhead cockpit air outlets
D. Overhead passenger outlets
6. The Freon system should not be
used above:
A. 5,000 feet
B. 8,000 feet
C. 10,000 feet
D. 18,000 feet (15,000 feet, model 23)
7. The Freon system automatically
disengages:
A. During engine start
B. Upon touchdown
C. When unpressurized
D. If the main door is opened
8. When the Freon system is operating,
it cools:
A. Ram air
B. Cabin air
C. Outside air
D. Bleed air
9. When operating the Freon system on
the ground with engines running, the
switch(es) that should be in OFF for
maximum cooling effectiveness is the:
A. START-GEN
B. CABIN BLOWER
C. CAB AIR or AIR BLEED
D. COCKPIT AIR
10. In order to operate the auxiliary heater
or Freon system:
A. The engines cannot be running.
B. The CAB AIR switch must be off.
C. Either a GPU or an engine-driven
generator is required.
D. The airplane must be on the ground.
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