The bypass ratio .i is the ratio of inlet air mass flow to hp compressor mass ? [ Program pilot ]

Question 50-1 : I is incorrect ii is incorrect i is correct ii is incorrect i is incorrect ii is correct i is correct ii is correct

exemple 150 I is incorrect, ii is incorrect. — Img939.bypass ratio = bypass mass flow / hp compressor mass flow .the bypass ratio can be determined from the inlet air mass flow and the bypass mass flow and not by volume I is incorrect, ii is incorrect.

Compressor stall in a gas turbine engine ?

Question 50-2 : Can be caused by an axial airflow velocity that is low relative to the rotor speed does not occur with well designed compressor blades is unlikely to occur in a compressor with many stages only occurs during engine start up

exemple 154 Can be caused by an axial airflow velocity that is low relative to the rotor speed. — .like the stall of a wing compressor stall is caused by a breakdown of airflow .if your wing is suitable for high speed and you fly at low speed and large angle of attack the stall is most likely to occur .a compressor stall is most likely to occur when the air flow stagnates in the rear stages of the compressor a compressor blade is hitting the oncoming airflow at an angle of attack that is determined by a combination of the rotational speed and the incoming airflow .when the incoming speed is low the angle of attack will be high when the angle of attack gets too high the blade stalls so when the axial flow in a compressor backs up the blades stall pressure increase in the rear stages this slows down the flow .you can prevent this by dumping some late stage air to atmosphere via bleed valves Can be caused by an axial airflow velocity that is low relative to the rotor speed.

The air flow passages between adjacent axial compressor rotor blades are ?

Question 50-3 : Part of the compressor work delivered to the air is converted into kinetic energy it is a constant temperature process the compressor rotational velocity slows down the air flow the gas expands between the blades

exemple 158 Part of the compressor work delivered to the air is converted into kinetic energy. — .compression of hot gas in the rotor is followed by an expansion before entering the stator Part of the compressor work delivered to the air is converted into kinetic energy.

A twin spool gas turbine engine is one in which the ?

Question 50-4 : Lp turbine drives the lp compressor and the hp turbine drives the hp compressor lp compressor drives the hp compressor turbines are free to rotate at speeds that differ from their associated compressors lp turbine drives both the lp compressor and the hp compressor

exemple 162 Lp turbine drives the lp compressor and the hp turbine drives the hp compressor. — Lp turbine drives the lp compressor and the hp turbine drives the hp compressor.

When the combustion gases pass through a turbine the ?

Question 50-5 : Pressure drops pressure rises axial velocity of the flow decreases temperature increases

exemple 166 Pressure drops. — Pressure drops.

The most common extinguishing agent used in gas turbine engine fire protection ?

Question 50-6 : A liquid halogenated extinguishing agent and pressurized gas typically nitrogen water co2 powder

exemple 170 A liquid halogenated extinguishing agent and pressurized gas (typically nitrogen). — A liquid halogenated extinguishing agent and pressurized gas (typically nitrogen).

When a part of a continuous loop fire detection system is heated .1 its ?

Question 50-7 : 1 and 3 2 and 3 1 and 4 2 and 4

A fault protection circuit in a fire detection system will ?

Question 50-8 : Inhibit the fire detector when the detection line is connected to ground activate an alarm in the cockpit and in the landing gear bay for ground crew activate the fire detection system when the detection line is connected to ground automatically initiate apu shutdown and fire extinguisher striker activation in the event of fire

exemple 178 Inhibit the fire detector when the detection line is connected to ground. — A fault protection circuit in a fire detection system will inhibit fire detection when the detection line is connected to ground so if a fire detection system with no fault protection has single loop continuous components if the line is accidentally grounded the alarm will be triggered Inhibit the fire detector when the detection line is connected to ground.

In a fire detection system with single loop continuous components with no fault ?

Question 50-9 : The fire alarm is triggered the engine fire extinguisher striker is automatically activated there will be no effect on the system the power supply is cut off automatically

When a continuous loop wire type fire detection system is tested ?

Question 50-10 : The wiring and the warning are tested the wire is totally heated only the warning function is tested a part of the wire is totally heated

exemple 186 The wiring and the warning are tested. — The wiring and the warning are tested.

Regarding fire detection ion detectors are used to detect ?

Question 50-11 : Smoke overtemperature and fire fire overtemperature

Smoke detector systems are installed in the ?

Question 50-12 : Upper cargo compartments class e wheel wells engine nacelles fuel tanks

exemple 194 Upper cargo compartments (class e). — Upper cargo compartments (class e).

Continuous loop fire detector systems operate on the principle that an increase ?

Question 50-13 : A decrease in resistance an increase in resistance a decrease in the reference current a decrease in pressure

exemple 198 A decrease in resistance — A decrease in resistance

Generally when the fire handle of the engine fire extinguishing system on an ?

Question 50-14 : 1 3 4 and 5 1 3 and 4 1 2 5 and 6 2 3 4 and 5

exemple 202 1, 3, 4 and 5. — Pulling the engine fire switch up . closes both the engine fuel shutoff valve and the spar fuel shutoff valve. closes the engine bleed air valve resulting in loss of wing anti ice to the affected wing and closure of bleed air operated pack valve. trips the generator control relay and breaker. closes the hydraulic fluid shutoff valve . disables thrust reverser for the related engine. allows the engine fire switch to be rotated for discharge. arms one discharge squib on each engine fire extinguisher bottle.rotating the engine fire switch electrically 'fires' a squib discharging the extinguishing agent into the related engine rotating the switch the other way discharges the remaining bottle 1, 3, 4 and 5.

On a multi engined aircraft a fire detection system includes ?

Question 50-15 : A warning light for each engine and a single alarm bell common to all engines both a warning light and an alarm bell unique to each engine a single warning light and a single alarm bell a single warning light but a separate alarm bell for each engine

exemple 206 A warning light for each engine and a single alarm bell common to all engines. — A warning light for each engine and a single alarm bell common to all engines.

On an aircraft provided with resistance and capacitance variation type fire ?

Question 50-16 : At any isolated point of the loops or else generally on all the loops only at an isolated point of the loops only in a uniform way along the loops on at least one loop

exemple 210 At any isolated point of the loops or else generally on all the loops. — At any isolated point of the loops or else generally on all the loops.

Smoke detectors fitted on transport aircraft are of the following type ?

Question 50-17 : Optical or ionization chemical electrical magnetic

exemple 214 Optical or ionization. — Optical or ionization.

The bimetal strip detectors of an engine fire detection system .1 are arranged ?

Question 50-18 : 2 and 4 1 and 4 2 and 3 1 and 3

exemple 218 2 and 4. — For an engine the bimetal strip detectors are arranged in parallel and close during a fire the reason for this its because engine fire detection systems don't need to be operating 100% of time eg when the aircraft is parked for the night .watch this video . >jaqmgkxk2q8.the system is functioning only when the aircraft is 'alive' .when they are arranged in series the system must be energized all the time since it opens during a fire .it means that in case of an electrical failure or in the case that you forget to switch on the alternators after having start the engine when you switch off the batterie the alarm is triggered 2 and 4.

When a bimetallic strip is used as a switch in a fire detection loop a fire ?

Question 50-19 : Avoid false alarms in case of vibrations allow temperatures to equalise delay the triggering of the fire extinguishers and increase their efficiency wait for the triggering of the second fire detection loop in order to confirm the fire

exemple 222 Avoid false alarms in case of vibrations. — Avoid false alarms in case of vibrations.

An engine fire is indicated by a n ?

Question 50-20 : Warning and an aural alert bell warning only aural alert only

exemple 226 Warning and an aural alert. — Warning and an aural alert.

A continuous loop detector system is a ?

Question 50-21 : Overheat detection system smoke detection system carbon dioxide warning system fire fighting system

exemple 230 Overheat detection system. — Overheat detection system.

At reference the smoke detection in the aircraft cargo compartments is carried ?

Question 50-22 : The c1 and c2 sensors detect smoke the c1 and c3 sensors detect smoke only one sensor detects smoke the c2 and c4 sensors detect smoke

exemple 234 The c1 and c2 sensors detect smoke. — Notice c3 and c4 will also trigger the alarm . 941 The c1 and c2 sensors detect smoke.

A gaseous fire loop system is tested by ?

Question 50-23 : Heating up the sensor checking the continuity of the system checking the wiring harness for faults but not the sensor checking the sensor with external pressurised gas

exemple 238 Heating up the sensor. — Heating up the sensor.

Power plant fire extinguishers are operated by ?

Question 50-24 : An electrically fired cartridge rupturing a seal in the head of the bottle manual remote control opening a discharge valve an electrically heated capsule rupturing a seal in the pipeline at the engine a mechanical link withdrawing a safety pin and allowing a spring operated plunger to rupture the bottle seal

Boeing 737 computer based training cbt . pulling the fire handle arms the associated squib of each fire bottle once the fire handle has been pulled the fire extinguisher bottle can be discharged by rotating the fire handle in either direction this will discharge the associated fire bottle and release the contents of the selected bottle into the selected ducting for example rotating the fire handle to the left discharges the left bottle 28 volts dc from the hot battery bus is required to fire the bottle

A fire detection system includes ?

Question 50-25 : A warning light for each engine and a single alarm bell common to all engines a single warning light but a separate alarm bell for each engine a single warning light and a single alarm bell both a warning light and an alarm bell unique to each engine

exemple 246 A warning light for each engine and a single alarm bell common to all engines. — A warning light for each engine and a single alarm bell common to all engines.

The correct statement about rain protection for cockpit windshields is that ?

Question 50-26 : Rain repellent should never be sprayed onto the windshield unless the rainfall is very heavy wipers are sufficient under heavy rain conditions the electric de icing system for cockpit windows is also suitable for rain protection the alcohol de icing system for cockpit windows is also suitable for rain protection

exemple 250 Rain repellent should never be sprayed onto the windshield unless the rainfall is very heavy. — Rain repellent should never be sprayed onto the windshield unless the rainfall is very heavy.

Fire precautions to be observed before refuelling are ?

Question 50-27 : All bonding and connections to the earth terminal between ground equipment and the aircraft should be made before filler caps are removed ground power units gpu are not to be operated passengers may be boarded traversing the refuelling zone providing suitable fire extinguishers are readily available aircraft must be more than 10 metres from radar or hf radio equipment under test

exemple 254 All bonding and connections to the earth terminal between ground equipment and the aircraft should be made before filler caps are removed. — The fuel caps should not be removed until the aircraft has been correctly earthed/bonded All bonding and connections to the earth terminal between ground equipment and the aircraft should be made before filler caps are removed.

Overheat detection systems in a transport aircraft are installed in the ?

Question 50-28 : Wheel wells wheels cabin fuel tanks

exemple 258 Wheel wells. — You will find smoke detectors in the cargo bays .there are no smoke detectors in the wheel wells the wheel wells doors will not 'seal' the well the smoke is quickly sucked out so smoke detectors would be ineffective Wheel wells.

In a pressurized transport aircraft the protective breathing equipment ?

Question 50-29 : Protects the members of the crew against fumes and noxious gases protects all the occupants against the effects of accidental depressurization protects the members of the crew against the effects of accidental depressurization gives medical assistance to certain passengers with respiratory disorders

exemple 262 Protects the members of the crew against fumes and noxious gases. — Protects the members of the crew against fumes and noxious gases.

When quick donning masks are in use the pilot is ?

Question 50-30 : Able to radiotelephone only able to receive only able to transmit not able to do any radio communication

exemple 266 Able to radiotelephone. — Able to radiotelephone.

What is breathed in when using a passenger oxygen mask ?

Question 50-31 : Cabin air and oxygen 100% oxygen cabin air and oxygen or 100% oxygen a mixture of oxygen and freon gas

exemple 270 Cabin air and oxygen. — An oxygen mask consists of a yellow soft silicone facial cup with white elastic bands for securing the mask to the passenger's face. 1059.chemical oxygen generators is the most common system they use sodium chlorate and iron filings and the supply lasts for about 15 minutes the flow can not be modulated and it is a continuous flow .at 32000 ft even if it's a rapid decompression cabin pressure remains a little bit higher than outside pressure and do not forget that the pilots have to immediatly start a descent Cabin air and oxygen.

The purpose of the regulator of a flight deck oxygen system is to .1 increase ?

Question 50-32 : 2 3 4 and 5 3 4 5 and 6 1 2 3 and 4 1 3 4 and 6

exemple 274 2, 3, 4 and 5. — 2, 3, 4 and 5.

A diluter demand oxygen regulator selected to '100%' ?

Question 50-33 : Delivers oxygen flow when inhaling delivers oxygen flow only above fl100 is only recommended for use with smoke in the cockpit mixes air and oxygen in a passenger oxygen mask

exemple 278 Delivers oxygen flow when inhaling. — Delivers oxygen flow when inhaling.

In jet transport aircraft breathing oxygen for the cockpit is usually stored in ?

Question 50-34 : Gaseous liquid chemical chemical or gaseous

In what state is the breathing oxygen for the cockpit of jet transport ?

Question 50-35 : Gaseous a gaseous or chemical compound chemical compound liquid

If the maximum operating pressure of the oxygen system is exceeded the ?

Question 50-36 : Oxygen is discharged overboard via a safety plug oxygen becomes unusable for the passengers passenger oxygen masks will drop down oxygen bottles close automatically

exemple 290 Oxygen is discharged overboard via a safety plug. — Oxygen is discharged overboard via a safety plug.

A pressurized aircraft is operated at fl 300 it undergoes a rapid decompression ?

Question 50-37 : The oxygen masks are automatically presented to cabin crew members and passengers the oxygen masks are automatically presented to flight crew members if the automatic mask presentation has been activated the oxygen will flow within the first 3 minutes manual override of the automatic presentation of passenger oxygen masks is generally speaking not possible

exemple 294 The oxygen masks are automatically presented to cabin crew members and passengers. — The oxygen masks are automatically presented to cabin crew members and passengers.

A substance which may never be used in the vicinity or on parts of an oxygen ?

Question 50-38 : Grease water halon nitrogen

exemple 298 Grease. — Oil or grease traces may never be near or on parts of an oxygen installation as there is a risk of explosion when used with oxygen under pressure .heat and pressure are just two means of producing the same effect i e jamming molecules together with enough force to trigger a chemical reaction .so putting oxygen under pressure in contact with a flammable substance is the same as heating it in pure oxygen environment it take surprisingly little pressure to trigger ignition Grease.

The type of a aircraft oxygen system intended for use by passengers is mostly ?

Question 50-39 : A continuous flow system an air recycle system portable equipment only a pressure demand system

exemple 302 A continuous flow system. — Most commercial aircraft are pressurized at a maximum cabin altitude of 8000 feet where it is possible to breathe normally without an oxygen mask if the cabin pressurization level reaches the equivalent of 14000 feet or higher on the exterior or a decompression occurs above that flying level and hypoxia is possible compartments containing the oxygen masks will open automatically either above or in front of the passenger and crew seats and the oxygen masks will drop down in front of the passenger .an oxygen mask consists of a yellow soft silicone facial cup with white elastic bands for securing the mask to the passenger's face. 1059.chemical oxygen generators is the most common system they use sodium chlorate and iron filings and the supply lasts for about 15 minutes the flow can not be modulated and it is a continuous flow A continuous flow system.

The demand valve of a diluter demand type oxygen regulator in normal mode ?

Question 50-40 : User breathes in user requires 100 percent oxygen diluter control is in normal position pressure in the oxygen reservoir is more than 500 psi

exemple 306 User breathes in. — User breathes in.

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1959 Free Training Exam Other source study: Furious atpl examen 50