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2208 final
| Question | Answer |
|---|---|
| What component in a vaporcycle cooling system will most likely be at fault if a system would not take a free on charge | Expansion valve |
| What is ventilating air used for on a combustion heater | Carries heat to the places where needed |
| The point at which Freon flowing through a vapor cycle cooling system absorbs heat and changes from a liquid to a gas is the | Evaporator |
| When an aircraft oxygen system has developed a leak the lines of fitting should be | Bubble tester with a special soap solution manufacture specifically for that purpose |
| An aircraft oxygen bottle may be considered airworthy if it has been hydrostatically tested in identifying | What’s the test eight DOT number and serial number stamped on the cylinder near the neck |
| What component might be possibly damage of liquid refrigerant is introduced to the low side of a vapor cycle cooling system when the pressure is too high or the outside air temperature is too low | Compressor |
| The function of the evaporator in a Freon cooling system is to | Lower the temperature of the cabin air |
| Turbine engine air used for air conditioning in pressurization is generally called | bleed air |
| Which section of a turbine engine provides high pressure bleed air to an air cycle machine for prejualization and air conditioning | Low or high pressure compressor |
| Primary difference between aviation breathing oxygen and other types of commercially available compressed oxygen is that | Aviation breathing oxygen has had all the water vapor removed |
| High pressure cylinders containing oxygen for aviation used to be identified by their | Green color and the words AVIATORS BREATHING OXYGEN stenciled in 1 inch white letters |
| If oxygen bottle pressure is allowed to drop below a specific minimum it may cause | Moisture to collect in the bottle |
| Evacuation of a vapor cycle cooling system removes any water that may be present by | Lowering the boiling point of the water and drawing out the vapor |
| Which oxygen system employees a regulator that operates only when the user inhales | Continuous flow system |
| When servicing and air-conditioning system that has lost all his Freon is necessary to | Check oil and add as necessary evacuate the system and add Freon |
| How compressor bleed air operates the condition air system on some turbine aircraft code air supplied by the | Air cycle air conditioning |
| What is the condition of the refrigerant as it leaves the condenser of a vapor cycle cooling system | High pressure liquid |
| How often should standard weight high pressure oxygen cylinders be hydrostatically tested | Every five years |
| What component of a pressurization system prevents the cabin attitude from becoming higher than the airplane | Negative pressure relief valve |
| What unit is located immediately downstream of the expansion valve and a Freon refrigeration system | Evaporator coils |
| What is used in some oxygen systems that change hi cylinder pressure too low system pressure | Pressure reducer valve |
| The point at which Freon flowing through a vapor cycle cooling system gives off heat and changes from a gas to a liquid is the | Condenser |
| When charging a vapor cycle cooling system after evacuation the low pressure gauge fails to come out of a vacuum what is indicated | Blockage in the system |
| Which of the following are characteristics of a chemical or solid-state oxygen system | A volume storage capacity about three times that of a compressed oxygen and system generators that are a nerd below 400°F even under severe impact |
| The purpose of a dump valve a pressurized aircraft has to relieve | Are positive pressure from the cabin |
| On some Kevin price rotation system specialization on the ground is restricted by the | Main landing gear operated switch |
| The function of an expansion valve in a Freon cooling system is to act as a metering device and to | Reduce the pressure of the liquid Freon |
| To be eligible for recharging a DOT3HT oxygen cylinder must have been how do you say tested every three years and be retired from service after | 24 years or 4380 filling cycles |
| Before a high-pressure oxygen cylinder is serviced it must be correct type and have been | Hydrostatically test placed in the proper time interval |
| What controls the amount of oxygen delivered to a mask and a continuous flow oxygen system | Calibrated office |
| Basic air cycle cooling system consist of | source of compressed air heat exchangers and a turbine |
| Hey contaminated oxygen system is normally purged with | Oxygen |
| The primary function of the cabin pressurization system outflow valve is to | Maintain desired cabin pressure |
| Froster ice build up on a vapor cycle coin system evaporator would most likely be caused by | Inadequate airflow through the evaporator |
| One purpose of a jet pump in a pressurization and air-conditioning system is to | Provide for augmentation of airflow in some areas of the aircraft |
| The question heater combustion air system what prevents too much air from entering the heaters as an air pressure decreases | Either combustion air leaf Avenue or a differential pressure regulator |
| What is the purpose of pressurizing the aircraft cabin | To make human flight possible in a hostile environment of the upper atmosphere |
| Which best describes cabin differential pressure | Difference between the ambient and internal air pressure |
| And the diluter demand oxygen regulator when does the demand valve operate | When they user breathes |
| An operating vapor cycle cooling system if the two lines connected to the expansion valve are essentially the same temperature what does this indicate | The expansion valve is not metering properly |
| Oxygen systems and unpressurized aircraft are generally of the | Continuous flow and pressure demand types |
| What controls the operation of the cabin pressure regulator | Cabin altitude |
| In a gaseous oxygen system which of the following are vented to blow out plugs in the fuselage skin | Pressure relief valves |
| How is the cabin pressure of a pressurized aircraft usually controlled | Buy an automatic outflow Val that dumped all the pressure in excess of the amount for which it is set |
| When refrigerant – 12 has passed over an open flame it | Changes to phosgene gas |
| Oxygen used in aircraft systems | Is at least 99.5% pure and is practically water free |
| The cabin pressure control setting has a direct influence upon the | Outflow valve opening |
| Which is considered a good practice concerning the inspection of heating and exhaust systems of aircraft utilizing a jacket around the engine exhaust as a heat source | Supplement physical inspections with periodic operational carbon monoxide detection test |
| What is the condition of the refrigerant as it enters the condenser of a vapor cycle cooling system | High pressure vapor |
| An aircraft pressurization cycle is normally considered to be | One complete series of events or operations that recur regularly |
| The cabin pressurization modes of operation are | Differential unpressurized and isobaric |
| The purpose of a sub core in a vapor cycle cooling system is to | Call the Freon to prevent premature vaporization |
| For use and unpressurized aircraft which is generally the least complicated and requires the least maintenance | Chemical oxygen generator systems |
| What unit in a weber cycle cooling system serves as a Reservoir for the refrigerant | Receiver dryer |
| Which component in an air cycle cooling system does air undergo a pressure and temperature drop | Expansion turbine |
| Where does the last stage of calling in an air cycle air-conditioning system occur | Expansion turbine |
| A small amount of water and a vapor so I can cooling system can freeze | And the expansion valve and stop the entire system operation |
| What is the purpose of a mixing valve in a compressor bleed air air conditioning system | Control the supply of hot cool and cold air |
| How can I be determined that a vapor cycle cooling system is charged with the proper amount of Freon | Air bubbles in the sight glass disappear |
| The position of the thermostatic expansion valve in a vapor cycle cooling system is determined by temperature and the pressure of the | Freon in the outlet of the evaporator |
| And what positions to the bottle be placed when adding liquid Freon to a vapor cycle cooling system | Vertical with the outlet at the bottom |
| What is the condition of the refrigerator as it leaves the evaporator of a vapor cycle cooling system | Low pressure vapor |
| What is the main cause of contamination in a gaseous oxygen system | Moisture |
| The component of determines the pressure level in the cabin is the cabin air pressure | Outflow valve |
| I’m transport category aircraft what might be an indication of an overpressure event of the aircraft oxygen system | The green thermal expansion disk missing |
| The air cycle cooling system produces cold air by | Extracting heat energy across an expansion turbine |
| How is cabin pressure of an aircraft maintained in flight | By controlling the rate of the air flowing out of the cabin |
| And a high pressure oxygen system if the pressure reducer fails what prevents high-pressure oxygen from entering the system down stream | Pressure relief valve |
| What type of oil is suitable for use in vapor cycle cooling system | Special high-grade refrigeration oil |
| How should you determine the amount of oxygen in a portable high pressure cylinder | Read the pressure gauge mounted on the cylinder |
| If a high pressure oxygen cylinder is to be installed an airplane I must me the specifications of the | Department of transportation |
| After cleaning replacing the filtering elements in a combustion here fuel system the system should be pressurized and | All connections checked for leaks |
| Which prevents a sudden loss of specialization in the event that there is a loss of the pressurization source | Delivery air duct check valve |
| What maybe use as a lubricant on oxygen system tapered pipe thread conductions | Teflon tape |
| The operation of an aircraft combustion heater is usually controlled by a thermostat circuit which | Alternately turns the fuel on and off a process known as cycling |
| What is a steady stream of bubbles and the Cait when servicing a vapor cycle air conditioning system | The system is under charged |
| What test is used to determine the serviceability of an oxygen cylinder | Pressure test with water |
| The purpose of the airflow metering android assembly found in oxygen diluted the man regulators is to | Really airflow in relation to cabin altitude win and dilute demand position |
| If the cabin rate of climb is too great the control should be adjusted to cause the | Outflow valve to close faster |
| The function of the condenser in a Freon cooling system is to | Transfer heat from the Freon gas to ambient air |
| If a liquid level gauge in a vapor cycle cooling system indicates a low Freon charge the system should | Be operated for a period of time to read a stable condition and then the Freon level rechecked |
| When a vapor cycle cooling system is not an operation what is an indication that the system is leaking Freon | Oil seepage |
| Hey pressurization controller uses | Barometric pressure cabin altitude and cabin rate of change |
| What is the condition of the refrigerant as it enters the evaporator of a vapor cycle cooling system | Low pressure liquid |
| When purging a Freon air conditioning system is important to release the charge at a slow rate what is a reason for the slow rate discharge | Prevent access loss of refrigerant oil |
| And a Freon vapor cycle cooling system where is cooling air obtain for the condenser | Ambient air |
Created by:
Ihaymond