4-47.
Distribution of conditioned air
to the cabin can be divided
between air used for the cabin
and air used for defogging the
windshield. This distribution is
accomplished by what action?
1. Selecting the appropriate
position on the suit/cabin
temperature control valve
2. Selecting the appropriate
position on the air-
conditioning system
temperature/flow controller
3. Selecting the appropriate
position on the windshield
defogging switch
4. Selecting the appropriate
position on the cabin defog
plenum distribution valve
with a control handle
4-48.
Which of the following components
provides the electrical signal
that determines the position of
the cabin add heat valve?
1.
Cabin air overtemperature
sensor
2.
Cabin airflow\temperature
sensor
3.
Cabin/defog plenum
distribution valve
4.
Suit/cabin temperature
control
4-49.
Which of the following actions
explains how air pressure and
spring tension operate the cabin
add heat valve?
1.
Venting air pressure from the
valve allows the valve to
close against spring tension
2.
Venting air pressure from the
valve allows the valve to
open under spring tension
3.
Regulated air pressure to the
valve and spring tension aid
in opening the valve
4.
Regulated air pressure to the
valve overcomes spring
tension opening the valve
4-50.
When an overtemperature occurs in
the cabin cooling system, the
cabin air overtemperature sensor
allows which of the following
actions?
1.
The cabin flow valve to open
2.
The cabin/defog plenum
distribution valve to close
3.
The cabin add heat valve to
close
4.
The cabin ram air check valve
to open
4-51.
What component(s) in the cabin
cooling and antifog system
provide(s) for the automatic
operation of the cabin flow
valve?
1.
Cabin/defog ram air solenoid
only
2.
Cabin/defog ram air solenoid
and the cabin overtemperature
sensor
3.
Cabin airflow/temperature
sensor only
4.
Cabin airflow/temperature
sensor and the air–
conditioning system
temperature/flow controller
4-52.
Which of the following statements
is correct regarding the
automatic drain valve in the
cabin cooling and antifog system?
1.
It relieves excessive
pressure
2.
It regulates pressure in the
system
3.
It is open to drain moisture
from the supply duct, it
closes when pressure is
applied
4.
It drains the system of
moisture when the switch on
the air-conditioning system
temperature/flow controller
is turned on, and it closes
automatically when pressure
is applied to the system
Learning Objective:
Recognize the source for
avionics cooling air and
identify the components of
the avionic cooling
system and the function of
each component.
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