A320 - ATA 21 AIR CONDITIONING 131
complete solutions.
A320 - ATA 21 AIR CONDITIONING 131
complete solutions.
What are the different sources of air for air conditioning and pressurization?
A) Engine bleed air and recirculated air (only on ground)
B) Engine bleed air and recirculated air.
C) Engine bleed air and recirculated air, or if selected, APU bleed air and recirculated air.
D) Engine bleed air only. - ANSWER C
During the exterior preflight on a warm day, in what position would you expect to find the avionics
ventilation system INLET and EXTRACT valves to be in?
A) Closed.
B) Open.
C) Closed or open regarding of the APU bleed valve.
D) Closed or open - ANSWER B
Conditioned air is distributed to:
A) Cockpit, cargo bays and cabin
B) Cockpit, fwd and aft cabins
C) Cockpit, avionics bay and cabin
D) Cockpit, cabin and holds 1 and 2 only - ANSWER B
Hot air fault light illuminates on the air conditioning panel,
A) The hot air press. reg. valve opens and the trim air valves close.
B) The hot air press. reg. valve closes and the trim air valves open.
C) The hot air press. reg. valve closes and the trim air valves close.
D) The hot air press. reg. valve opens and the trim air valves open. - ANSWER C
,A320 - ATA 21 AIR CONDITIONING 131
complete solutions.
Does the trim air provide the warm air or the cold air to the air conditioning system?
A) Cold air
B) Warm air - ANSWER B
In case of zone controller primary and secondary channel failure, what temperatures are maintained by
pack one and pack two?
A) 15 deg.C both
B) 25 deg.C both
C) 20 deg.C for pack one and 10 deg.C for pack two
D) 24 deg.C for pack one and 15 deg.C for pack two - ANSWER C
In normal flight in closed circuit configuration, the avionics ventilation system controls the temperature
of the cooling air by:
A) Adding air conditioned air to the flow
B) Extracting air overboard
C) Adding avionics bay air
D) Passing air through a skin heat exchanger - ANSWER D
To enable Ram air to the mixture unit, The Ram air switch should be used:
A) At any time
B) Only when differential pressure is less than 1 psi.
C) When pressure is greater than 1 psi diff.
D) Only after outflow valve is fully opened - ANSWER B
Pack controller, primary channel failure.
A) The secondary computer operates as a backup mode and regulation is not optimized
B) The secondary computer takes over (all functions as normal)
, A320 - ATA 21 AIR CONDITIONING 131
complete solutions.
C) Pack is lost
D) Pack outlet temperature is controlled at 15 deg.C - ANSWER A
Pack controller, secondary channel failure (so, not BOTH channels have failed, just the secondary one)
A) No effect on pack regulation backup mode is lost
B) Pack is lost
C) No effect (all modes still available)
D) Pack outlet temperature is controlled at 15 deg.C' - ANSWER A
Pack controller, primary and secondary channel failure
A) Pack outlet temperature is controlled to between 5 and 30 deg.C by the anti-ice valve
B) The pack is closed
C) The packs deliver a fixed temperature of 20 deg.C - ANSWER A
Hot air press. reg. valve failed open:
A) Optimized regulation is lost
B) The temperature stays at the value selected
C) No effect
D) Cabin temperature will be controlled at the upper limit 30 deg.C - ANSWER C
Bleed air supplied from the APU (APU bleed valve open), the pack flow is automatically selected:
A) High
B) Normal
C) Low
D) Econ. Flow - ANSWER A
Trim air valve, each one optimizes the temperature by:
complete solutions.
A320 - ATA 21 AIR CONDITIONING 131
complete solutions.
What are the different sources of air for air conditioning and pressurization?
A) Engine bleed air and recirculated air (only on ground)
B) Engine bleed air and recirculated air.
C) Engine bleed air and recirculated air, or if selected, APU bleed air and recirculated air.
D) Engine bleed air only. - ANSWER C
During the exterior preflight on a warm day, in what position would you expect to find the avionics
ventilation system INLET and EXTRACT valves to be in?
A) Closed.
B) Open.
C) Closed or open regarding of the APU bleed valve.
D) Closed or open - ANSWER B
Conditioned air is distributed to:
A) Cockpit, cargo bays and cabin
B) Cockpit, fwd and aft cabins
C) Cockpit, avionics bay and cabin
D) Cockpit, cabin and holds 1 and 2 only - ANSWER B
Hot air fault light illuminates on the air conditioning panel,
A) The hot air press. reg. valve opens and the trim air valves close.
B) The hot air press. reg. valve closes and the trim air valves open.
C) The hot air press. reg. valve closes and the trim air valves close.
D) The hot air press. reg. valve opens and the trim air valves open. - ANSWER C
,A320 - ATA 21 AIR CONDITIONING 131
complete solutions.
Does the trim air provide the warm air or the cold air to the air conditioning system?
A) Cold air
B) Warm air - ANSWER B
In case of zone controller primary and secondary channel failure, what temperatures are maintained by
pack one and pack two?
A) 15 deg.C both
B) 25 deg.C both
C) 20 deg.C for pack one and 10 deg.C for pack two
D) 24 deg.C for pack one and 15 deg.C for pack two - ANSWER C
In normal flight in closed circuit configuration, the avionics ventilation system controls the temperature
of the cooling air by:
A) Adding air conditioned air to the flow
B) Extracting air overboard
C) Adding avionics bay air
D) Passing air through a skin heat exchanger - ANSWER D
To enable Ram air to the mixture unit, The Ram air switch should be used:
A) At any time
B) Only when differential pressure is less than 1 psi.
C) When pressure is greater than 1 psi diff.
D) Only after outflow valve is fully opened - ANSWER B
Pack controller, primary channel failure.
A) The secondary computer operates as a backup mode and regulation is not optimized
B) The secondary computer takes over (all functions as normal)
, A320 - ATA 21 AIR CONDITIONING 131
complete solutions.
C) Pack is lost
D) Pack outlet temperature is controlled at 15 deg.C - ANSWER A
Pack controller, secondary channel failure (so, not BOTH channels have failed, just the secondary one)
A) No effect on pack regulation backup mode is lost
B) Pack is lost
C) No effect (all modes still available)
D) Pack outlet temperature is controlled at 15 deg.C' - ANSWER A
Pack controller, primary and secondary channel failure
A) Pack outlet temperature is controlled to between 5 and 30 deg.C by the anti-ice valve
B) The pack is closed
C) The packs deliver a fixed temperature of 20 deg.C - ANSWER A
Hot air press. reg. valve failed open:
A) Optimized regulation is lost
B) The temperature stays at the value selected
C) No effect
D) Cabin temperature will be controlled at the upper limit 30 deg.C - ANSWER C
Bleed air supplied from the APU (APU bleed valve open), the pack flow is automatically selected:
A) High
B) Normal
C) Low
D) Econ. Flow - ANSWER A
Trim air valve, each one optimizes the temperature by:
