Mostly cooling...

Which component in a vapor cycle air conditioning system is responsible for changing the liquid refrigerant into a gas and cause cooling of the airflow over the component ?

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• The evaporator.

• The condenser.

• The compressor.

• The expansion chamber.

Which component of a vapor cycle air conditioning system is responsible for filtering the liquid refrigerant ( after the condenser) and removing moisture ?

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• The condenser.

• The receiver-dryer.

• The evaporator.

• The thermal expansion valve.

What is the status of the vapour cycle system if bubbles are seen in the receiver-dryer sight glass?

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• The system is operating normally.

• There is an incomplete condensation and the system is low on refrigerant.

• There is incomplete evaporation and the system is low on refrigerant.

• There is an air leak in the receiver-dryer.

In an air cycle air conditioning system, in which component does the first reduction in bleed air temperature occur ?

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• The primary heat exchanger.

• The secondary heat exchanger.

• The expansion turbine.

• The air cycle machine.

In an air cycle air conditioning system, which component is responsible for the greatest drop in temperature of the bleed air that is used for cabin cooling ?

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• The primary heat exchanger.

• The secondary heat exchanger.

• The expansion turbine.

• The air cycle machine.

What is the source of electrical power for the emergency lights on an aircraft?

• Main DC voltage bus.

• Essential AC voltage bus.

• Dedicated battery packs.

• Aircraft battery.

To check the serviceability of an escape slide during a daily or pre-flight check is

• To ensure that the girt bar is attached

• The bustle is bolted to the housing

• To check the charge on the slide pressure gauge is in the green band

• To check that the slide arm handle is free to move and the red pin has flag installed

When an emergency escape slide requires servicing

• An aircraft maintenance tech can repack the slide, an AME must refill the inflation cylinder and an AME must recertify the slide

• Only the inflation cylinder must be sent out for servicing as it requires nitrogen, or a mixture of gaseous CO2 and Nitrogen

• A team from the manufacturer must assess the level of service requirement and provide an action plan

• It must be sent out to an approved maintenance facility for servicing

Light refraction smoke detectors are activated when the detector

• measures a reduction in the amount of visible or infrared light in the surrounding area.

• senses light reflected from smoke particles passing through a chamber.

• uses radiation induced ionization to detect the presence of smoke.

• Senses smoke from flammable sources at temperatures above 100⁰C

What is the purpose of the oil separator in the pneumatic deicing system?

• To protect the deice boots from oil deterioration.

• To reduce oil consumption when the deice air is vented overboard.

• To keep the oil lubricating the pump.

• To prevent internal corrosion in the vacuum system.