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Texan > SYS - Environmental 1 > Flashcards

SYS - Environmental 1 Flashcards

(44 cards)

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1
Q

Which cockpit has the environmental control panel?

A

The front cockpit

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2
Q

What environmental switch is in the rear cockpit too?

A

Evap blower

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3
Q

Which duct provides fresh air?

A

Inlet duct

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4
Q

How is airlfow provided for in flit and on the ground?

A

In flight from ram air and a blower on the ground

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5
Q

What does the engine bleed air provide for? (5)

A
  • pressurisation
  • heating
  • OBOGS
  • G suit
  • defogging
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6
Q

Cockpit air conditioning cooling and avionics cooling is provided by the?

A

Engine driven vapour cycle system

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7
Q

Three positions of the bleed air inflow control switch?

A

Hi
Norm
Off

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8
Q

Three positions of the ram air flow control switch?

A

Hi
Norm
Off

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9
Q

What does the evaporator blower provide?

A

Airflow through respective air conditioning vents

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10
Q

What does the temperature control switch knob operate?

A

Motor driven heat exchanger bypass valve

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11
Q

What temp C is cockpit temperature regulated to in AUTO?

A

60-90deg f

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12
Q

Is the temp controller switch spring loaded to manual?

A

Yes

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13
Q

What does the AIR COND switch control?

A

The air conditioning compressor

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14
Q

When is the air conditioning compressor automatically on?

A

When the DEFOG switch is on

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15
Q

When is fresh air ventilation available? (2)

A

On ground and during unpressurised flight

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16
Q

Where is the ram air inlet?

A

On top of the cowl

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17
Q

What activates the blower?

A

Weight on wheels switch

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18
Q

Where does the fresh air come from once weight is off the wheels?

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A

Through the ram air inlet

19
Q

What happens to the fresh air valve when above 8000ft msl?

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A

It closes allowing the pressurisation system to operate

20
Q

What switch manually controls the fresh air valve?

Study These Flashcards
A

The RAM AIR FLOW switch

21
Q

What two areas are controlled with the vent controllers?

Study These Flashcards
A

Canopy defog and foot warmers

22
Q

How is cockpit air heated?

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A

Engine bleed air from P3 port

23
Q

What valve does the Bleed Air Inflow switch control?

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A

Bi-level flow control and shut off valve

24
Q

Which air is warmed in the heat exchanger?

Study These Flashcards
A

Fresh ram air

25
Where does the hot bleed air vent after it has been through the heat exchanger?
Lower potion of the right AFT cowling
26
What does the heat exchanger bypass valve do?
Allows for a portion of hot Bleed air to bypass the heat exchanger and mix with downstream air to control the desired temperature.
27
What temp does heat exchanger bypass valve closes and directs all air through the heat exchanger?
73.8deg c
28
Why does the firewall shit off valve get closed after an engine shutdown?
Prevents fumes entering the cockpit.
29
Where are the two duct temperature sensors?
One near the firewall shut off valve | One at the AFT defog control valve
30
When does the DUCT TEMP caution light illuminate?
300degf , 148.8degc
31
What is the name of the CB for inflow valves and motors?
INFLOW SYS
32
What valve is opened by the defog switch?
The bi-level flow control bypass valve
33
How does the cockpit defog venting system draw in cockpit air as well?
Am ejector Venturi
34
Other than the defog switch what switch must be positioned to get effective canopy defogging?
The vent lever must be in the canopy position
35
Warning - the canopy/windshield defogging system may not clear the windshield during an ___________ encounter.
Icing
36
Where can the first signs of icing present itself? (2)
Forward canopy bow and at base of windshield
37
What valve does is controlled by the TEMP CONTROL switch when in AUTO?
Heat exchanger bypass valve
38
When will Amber duct TEMP caution illuminate? (2)
- above 300deg f at AFT defog control valve with system in defog mode - above 300deg f anytime in the environmental system
39
What type of system is the air conditioning system?
Vapor cycle system
40
When does air conditioning system only operate? (3)
- engine is running - generator on line - Air Cond or Defog switch is on
41
The engine driven compressor pumps ________ in _________ form to the ____________ producing a high pressure _______ .
Refrigerant Vapor Condenser Liquid
42
Where does the liquid refrigerant go to from the condenser?
To the evaporator modules
43
Flow rate of evaporator blowers on hi?
350 cubic feet per minute
44
Where does the vaporised refrigerant go to after it has been through the evaporator coil?
Back to the engine driven compressor

Texan (19 decks)

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