Air Conditioning

Question 1

The temperature in each zone is controlled by the cabin air conditioning and temperature control system (CACTCS) modulating ____.

Answer 1

trim air

Question 2

In the auto range, you can adjust the flight deck temperature from ____ degrees F.

Answer 2

65 to 85

Question 3

How are the aft and bulk cargo compartments heated?

Answer 3

bleed air

Question 4

The Flight Attendants can control the conditioned air temperature ____.

Answer 4

plus or minus 10 degrees of the master reference temperature set on the flight deck Air Conditioning Panel, but within the range of 65 to 85 degrees Fahrenheit.

Question 5

If both packs are in standby cooling mode, or one is inoperative and the other is in standby cooling mode, the pack or packs will operate continuously regardless of altitude or OAT to ____.

Answer 5

maintain cabin pressurization

Question 6

The pack outlet temperature is controlled by ____.

Answer 6

the zone requiring the coolest temperature

Question 7

The LOW and HIGH temperature settings for the AFT and BULK Cargo Compartments are approximately ____ degrees Fahrenheit respectively.

Answer 7

40-50 and 65-75

Question 8

The bulk ventilation fan is provided for animal carriage. It is selected on by ____.

Answer 8

setting the Bulk Cargo switch to HIGH

Question 9

A leak is detected by the Duct Leak and Overheat Detection System. During the process of auto leak isolation, the crew may see EICAS message(s) ____.

Answer 9

BLEED LEAK followed by BLEED LOSS

Question 10

The Flight Deck receives 100% fresh conditioned air, at a slightly higher pressure than the cabin, from ____.

Answer 10

the Left Pack

Question 11

With the air conditioning temperature controls set at mid position (12 o-clock), the temperature is approximately ____ degrees F.

Answer 11

75

Question 12

On the ground, when the forward equipment cooling system is inoperative, the EICAS advisory message EQUIP COOLING will be displayed and ____.

Answer 12

the ground crew call horn in the nose wheel well sounds

Question 13

Regarding pack non-normal operations, pack control, fault detection, and overheat protection are all ___________.

Answer 13

automatic

Question 14

With the EQUIP COOLING switch in the AUTO position, equipment cooling is automatically controlled.

Answer 14

True

Question 15

Why does the flight deck receive conditioned air at a slightly higher pressure than the passenger cabin?

Answer 15

To prevent smoke from entering the flight deck.

Question 16

Both air conditioning PACK switches should be selected OFF if ground conditioned air is connected.

Answer 16

True

Question 17

What is the relationship between the aircraft altitude and equipment cooling, when the Equipment Cooling system is operating in the override (OVRD) mode?

Answer 17

The override mode supplies adequate cooling while the airplane is in cruise, but the airflow decreases as the airplane descends and the cabin differential decreases

Question 18

What is the function of the Recirculation (RECIRC) fans?

Answer 18

Recirculation fans assist the packs to maintain a constant ventilation rate through the cabin.

Question 19

Selecting a TRIM AIR switch ON commands the respective master trim air valve open.

Answer 19

True

Question 20

What is the function of the Air Conditioning Reset (AIR COND RESET) switch?

Answer 20

Resets a closed pack flow control valve or trim air valve closed due to overheat, control failure or valve failure.

Attempts to reset a failed recirculation fan.

Resets fault protection.

All of the above.

Question 21

What is the automatic (AUTO) temperature range of the Air Conditioning Temperature Controllers?

Answer 21

65 degrees F to 85 degrees F

Question 22

The flight attendant complains that the cabin is too cold and the highest cabin temperature she can attain is 75 degrees F. What position does the FO have set on the cabin temperature control selector?

Answer 22

65

Question 23

The FO resets the cabin temperature control selector to the center detent. What is the highest temperature (F) that can be selected in each cabin zone?

Answer 23

85

Question 24

If the flightdeck or cabin temperature selector setting is unavailable to the pack temperature controller, the pack outlet temperature is regulated to achieve either the last temperature set or an average cabin temperature of ____ degrees F.

Answer 24

75