ATR 72-600 (Air Conditioning and Pressurization)

During engine start:

• The extract fan stops during 120 seconds, and the EXHAUST MODE pushbutton FAULT light illuminates.

• Extract fan stops during 60 seconds, and the EXHAUST MODE pushbutton FAULT light does not illuminate.

• The extract fan stops during 10 seconds.

How high above take off elevation can the aircraft be operated without canceling the automatic return feature?

• any altitude 3,500 feet above the landing field elevation

• 2,500 feet on QNE (1013)

• any altitude less than 3,500 feet above the departure field elevation

The functions of the pack valve are:

• shut off and pressure control

• shut off, pressure control, and temperature control

• pressure control only

The pneumatic outflow valve:

• is slaved to the electro-pneumatic outflow valve in the automatic mode only

• operates in the manual mode only

• is always slaved to the electro-pneumatic outflow valve

The temperature control valve is:

• The valve is controlled in the automatic mode by the electronic temperature controller. In the manual mode, it is controlled by the compartment temperature selector knob.

• The valve is controlled in the automatic mode by the RECIRC FAN pushbutton. In the manual mode, it is controlled by the electronic temperature controller.

• The valve is controlled in the automatic mode by the pneumatic temperature controller. In the manual mode, it is controlled by the compartment temperature selector knob.

During normal operations with no failures, the pressurization controller uses as reference the aircraft static air pressure generated by:

• ADC 1 and the Captain's altimeter BARO setting

• ADC 2 and the Captain's altimeter BARO setting

• ADC 1 and 1013 hPa

• ADC 2 and 1013 hPa

The compartment temperature selector knob is operative:

• in the automatic mode only

• in the automatic and manual modes

• in the manual mode only

Which pack is the primary supplier of cockpit air?

• the left pack

• The left and right packs supply the cockpit in equal proportions.

• the right pack

If the automatic pressurization mode is desired, what should be the position of the CAB ALT knob?

• 6 o'clock position

• AUTO

• NORM

• 12 o'clock position

Assuming that the associated pack valve is not closed, the ground cooling fan is running:

• on the ground only

• on the ground or in flight, if the flaps are extended

• 1) in flight if the airspeed is less than 150 knots AND the landing gear has been retracted for less than 10 minutes, or 2) on the ground, or in flight when the airspeed is less than 150 knots AND the landing gear is extended