Citation Mustang – Air Conditioning - SmartCockpit - Airline training guides, Aviation, Operations, Safety

The hot bleed air from the engines is cooled by:

Centrifugal diffusers that drop the air pressure and thereby cools the bleed air.

Heat exchangers utilizing liquid refrigerants.

Either the Left Generator or the Right Generator needs to be operating.

Heat exchangers utilizing ram air.

Correct! Wrong!

A conventional vapor-cycle air-conditioning system provides further cooling and defogging, especially on the ground or at low altitudes on hot days.

False.

True.

Correct! Wrong!

If DC power is removed from the thermal actuator, it cools and retracts, opening its temperature control valve to maximum cooling. If the actuator fails by leaking, a spring retracts it to set the temperature control valve to maximum cooling.

False.

True.

Correct! Wrong!

On the ground with the throttles below 85% TLA and a temperature above 18 deg. C (65 deg. F), bleed air inflow is:

Selected to 8 ppm (pounds per minute).

Selected to 4 ppm (pounds per minute).

Stopped by the PRSOVs (Pressure regulating shutoff valves).

Stopped by the flow control valves.

Correct! Wrong!

In the event of a total DC power failure, the flow control valves fail to:

4 ppm (pounds per minute).

20 ppm (pounds per minute).

8 ppm (pounds per minute).

10 ppm (pounds per minute).

Correct! Wrong!

If either engine fails, the opposite flow control valve automatically goes to:

10 ppm (pounds per minute).

12 ppm (pounds per minute).

8 ppm (pounds per minute).

4 ppm (pounds per minute).

Correct! Wrong!

Selecting the FRESH AIR position:

Activates the vapor cycle air conditioner in flight to cool the bleed air from the engine.

Must not be used during ground operations.

Does not affect normal pressurized flight.

Causes the cabin to depressurize in flight at a nominal rate.

Correct! Wrong!

The left engine supplies air to the cabin area. The right engine supplies air for the cockpit.

False.

True.

Correct! Wrong!

The left engine supplies air to the cockpit. The right engine supplies air for the cabin area.

On the ground, the vapor cycle air conditioning system can be operated by:

Ground power unit only.

Either the left or right generator as well as a ground power unit.

The right generator or a ground power unit.

The left generator or a ground power unit.

Correct! Wrong!

Which of the following is required for the vapor cycle air conditioner to operate while in flight?

Both generators operating, the AIR COND switch placed in the up (AIR COND) position, and the COCKPIT and CABIN TEMP knobs set to the COLD position.

Both generators operating, the AIR COND switch placed in the up (AIR COND) position. There is no need to move the COCKPIT or CABIN FAN knobs out of the OFF position.

Both generators operating, the AIR COND switch placed in the up (AIR COND) position, and either the COCKPIT or CABIN FAN knobs out of the OFF position.

Either the left or right generator operating, the AIR COND switch placed in the up (AIR COND) position, and either the COCKPIT or CABIN FAN knobs out of the OFF position.

Correct! Wrong!

The right engine supplies bleed air to what part of the pressure vessel?

Under normal operating conditions the right engine supplies bleed air to the cabin. However, if the left engine bleed air supply is stopped the right engine can also supply bleed air to the cockpit through a one-way check valve.

The right engine only supplies bleed air to the cockpit.

The right engine only supplies bleed air to the cabin.

Under normal operating conditions the right engine supplies bleed air to the cockpit. However, if the left engine bleed air supply is stopped the right engine can also supply bleed air to the cabin through a one-way check valve.

Correct! Wrong!

Which of the following conditions allows bleed air inflow to the pressure vessel to be stopped?

Positioning the AIR SOURCE SELECT knob to either the L or R position.

Positioning the AIR SOURCE SELECT knob to FRESH AIR.

On the ground with the AIR SOURCE SELECT knob positioned to L or R and a pressure vessel temperature above 18 deg.C (65 deg.F).

In flight with the AIR SOURCE SELECT knob positioned in the BOTH position and a pressure vessel temperature above 18 deg.C (65 deg.F).

Correct! Wrong!

In the event of a total DC power failure, the temperature control valves fail to:

4 ppm (pounds per minute).

Max cold position.

8 ppm (pounds per minute).

Max hot position.

Correct! Wrong!

A thermal actuator adjusts the position of the temperature control valve. The actuator responds to the temperature of a gas inside the actuator, which is heated by an electrical heating element.

True.

False.

Correct! Wrong!

Throttles regulate engine power, but they have no influence on bleed air temperature and pressure.

True.

False.

Correct! Wrong!

If both generators fail and the BATT switch is positioned in the EMER position, what is the failed position for the PRSOVs (Pressure regulating shutoff valves) and FCVs (Flow control valves)?

Both PRSOVs fail closed with a loss of normal DC power and the FCVs fail to 8 ppm (pounds per minute).

Both PRSOVs fail open with a loss of normal DC power and the FCVs fail to 8 ppm (pounds per minute).

Both PRSOVs fail closed with a loss of normal DC power and the FCVs fail to 4 ppm (pounds per minute).

Both PRSOVs fail open with a loss of normal DC power and the FCVs fail to 4 ppm (pounds per minute).

Correct! Wrong!

A separate fresh-air vent system allows direct cockpit and cabin ventilation when unpressurized (at low altitudes or on the ground).

It requires both DC and AC power.

It requires DC power.

It requires AC power.

Correct! Wrong!

Citation Mustang – Air Conditioning