Question 51-1 : The chemical oxygen generator supplies oxygen for about ? [ Teaching aircraft ]

Question 51-2 : The advantages of a gaseous oxygen source for the passenger cabin are 1 a greater autonomy2 no risk of explosion3 reversible functioning4 easy storage and maintenance5 possibility to regulate flowthe combination regrouping all the correct statements is ?

1 3 and 5.

In large aircraft chemical oxygen generators furnsih oxygen to the cabin only they use sodium chlorate and iron filings and the supply last for about 15 minutesstorage and maintenance are easy they are no risk of explosion but you can not regulate or stop the flowin small aircraft oxygen is normally carried in a gaseous state pressurised in cylinders to 1800 psiautonomy is greater the flow can be modulated and stopped the storage volume depends on the size of the bottle and there is some maintenance explosion risk is not avoided

Question 51-3 : The equipment of an oxygen supply installation must be kept absolutely free of oil or grease traces as ?

These substances catch fire spontaneously in the presence of oxygen under pressure.

Question 51-4 : The opening of the doors giving access to the oxygen masks for the passengers is 1 pneumatic for the gaseous oxygen system2 electrical for the chemical oxygen system3 pneumatic for the chemical oxygen system4 electrical for the gaseous oxygen systemthe combination regrouping all the correct ?

1 2.

Question 51-5 : A passenger emergency mask is a ?

A continuous flow mask and cannot be used if there is smoke in the cabin.

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 passengeran oxygen mask consists of a yellow soft silicone facial cup with white elastic bands for securing the mask to the passenger's face 1059chemical 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 flowotherwise when the chemical generators is actived the passengers breathes a mixture of oxygen and cabin airnote this question is intended for pilots and flight crews inviting them in the case of smoke in the cabin to prefer a portable equipment instead of a passenger mask

Question 51-6 : When the oxygen system of a large aeroplane is used ?

With the setting on 'normal' the cockpit crew is supplied with a mixture of oxygen and cabin air.

Question 51-7 : An oxygen regulator has 3 controls a power lever onoff an 'o2' lever normal100% an emergency lever onoffamong the following statements the correct proposition is ?

The power lever on on and the 'o2' lever on normal allows the oxygen to enter the regulator and enables breathing of a mixture of airoxygen according to altitude.

Pilot oxygen mask is an on demand type mask

Question 51-8 : In case of smoke in the cockpit the crew oxygen regulator must be set to ?

Emergency.

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Question 51-9 : The installation and use of on board oxygen generators is such that 1 the smoking ban is imperative when used2 radio transmissions should be avoided3 no trace of grease must be found in the system assembly4 the system's filling adaptors must be greased with non freezing or graphite greasethe ?

1 and 3.

Question 51-10 : The replenishment of an onboard oxygen bottle must be done ?

With the engine s off.

Question 51-11 : The contents of an oxygen bottle can be ensured by the 1 weight2 pressure3 level4 volumethe combination containing all of the correct statements is ?

1 and 2 only.

A full cylinder of oxygen weighs a lot more than empty one the content can also be checked by reading the pressure gauge

Question 51-12 : The demand valve of a diluter demand type oxygen regulator in normal mode operates when the ?

User breathes in.

Question 51-13 : A passenger oxygen mask is ?

A continuous flow mask and in principle should not be used if there is smoke in the cabin.

Question 51-14 : A smoke hood is a device covering ?

The whole head and with a continuous oxygen flow.

A smoke hood has continuous flow it is a protective breathing equipment pbe >x2pjcxp m2e basilismail is this question different from question number 718 wich says that a smoke mask is a mask with flow on request and not continuousquestion 718 is about a smoke mask which is different from a hooda smoke mask is a device covering the whole face and with an oxygen flow only on demand

Question 51-15 : Regarding the chemical oxygen generator to enable the oxygen to flow the passenger must ?

Firmly pull the mask towards his face.

Question 51-16 : Fixed oxygen systems in pressurised aeroplanes are used to provide oxygen 1 in the event of depressurisation2 in the event of any passenger indisposition3 during a normal flight 4 in the event of smoke or toxic fumes in the cockpitthe combination of corrects statements is ?

1 4.

Question 51-17 : When using an emergency oxygen mask a pilot is able to ?

Both transmit and receive.

Question 51-18 : A smoke mask is a ?

Mask with flow on request and covers the whole face.

Question 51-19 : Which of these statements about chemical oxygen generators are correct or incorrect i chemical oxygen generators are used to supply the cockpit oxygen systemii the oxygen supply of chemical oxygen generators once activated can be switched off ?

I is incorrect ii is incorrect.

Question 51-20 : Which of these statements about chemical oxygen generators are correct or incorrect i chemical oxygen generators are often used to supply passenger oxy ii the oxygen supply of chemical oxygen generators once activated can be switched off ?

I is correct ii is incorrect.

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

Question 51-21 : Which of these statements about chemical oxygen generators are correct or incorrect i chemical oxygen generators are often used to supply passenger oxy ii the oxygen supply of chemical oxygen generators once activated cannot be switched off ?

I is correct ii is correct.

Question 51-22 : Which of these statements about chemical oxygen generators are correct or incorrect i chemical oxygen generators are used to supply the cockpit oxygen systemii the oxygen supply of chemical oxygen generators once activated cannot be switched off ?

I is incorrect ii is correct.

Chemical oxygen generators are used to supply the cockpit oxygen system incorrect cockpit oxygen is carried in a gaseous state pressurised in cylinders to 1800 psi greater autonomy reversible functioning and possibility to regulate flow the oxygen supply of chemical oxygen generators once activated cannot be switched off correct 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

Question 51-23 : The advantages of a chemical oxygen source for the passenger cabin are 1 reduced weight and volume 2 easy storage and maintenance 3 greater autonomy 4 no risk of explosion 5 reversible functioning 6 no maintenance the combination regrouping all the correct statements is ?

1 2 4 and 6.

Question 51-24 : The disadvantages of a chemical oxygen source for the passenger cabin are 1 a flow which cannot be modulated 2 a heavy and bulky system 3 non reversible functioning 4 risks of explosion 5 poor autonomy the combination regrouping all the correct statements is ?

Question 51-25 : The advantages of a gaseous oxygen source compared with a chemical source for the passenger cabin are 1 no risk of fire andor explosion2 possibility to regulate flow3 more capacitythe combination that regroups all of the correct statements is ?

2 3.

Question 51-26 : High frequency vibration usually emanates from ?

Transmission shafting.

Question 51-27 : The sand filter located at the air intake of a gas turbine engine ?

Reduces the efficiency of the air intake.

Question 51-28 : Warning lights associated with basic pitotstatic heating systems in helicopters usually inform the pilot that when illuminated ?

Either the heating element or the power relay has failed.

Question 51-29 : Helicopter engine bellmouth air intakes ?

May be heated by either hot oil electric mats or engine bleed air.

bell mouth inlet duct a form of convergent inlet air duct used to direct air into the inlet of a gas turbine engine the area of the duct gets smaller as the air flows into the engine the duct is very efficient especially where ram pressures are low as in helicopter engines where it is used widelyit may be heated by either hot oil electric mats or engine bleed air

Question 51-30 : Heating systems for helicopters may obtain hot air from the following sources 1 air tapped from the engine compressor2 air tapped from the engine turbine3 ambient air heated by electrical elementsthe combination grouping all of the correct statements is ?

1 3.

Question 51-31 : Warning devices associated with air conditioning systems fitted in helicopters are limited to ?

A green system ''on'' information light and amber bleed air failure lights.

Question 51-32 : The most common type of starter used on a helicopter engine is ?

A dc startergenerator.

Question 51-33 : The most common material used in the construction of gearbox casings is ?

Magnesium alloy.

Question 51-34 : For a large helicopter ram air ventilation ?

May be provided throughout the cockpit and cabin through a series of ducts.

Question 51-35 : The throttle control may be interconnected with ?

The collective lever to increase power with increased pitch application.

Question 51-36 : The purpose of the primary stops in a flying control system is to ?

Restrict the movement of the controls within the correct range.

Question 51-37 : The ducted fan type tail rotor ?

Uses an aerofoil shaped duct creating thrust.

Question 51-38 : Friction controls are usually fitted to ?

Both collective and cyclic controls but only the collective friction is adjustable in flight.

Question 51-39 : Which of the following statements about the swash plate in a helicopter provided with a hydraulic control system is correct ?

To be able to move or to tilt the swash plate in all directions at least three separate servo units are needed.

Question 51-40 : The main reason for fitting a rotor brake can be 1 to bring the rotor quickly to rest after engine shut down2 to stop the rotor from flight rpm3 to avoid high wind rotor engagement4 to allow an abrupt rotor stop at landingthe combination which regroups all of the correct statements is ?

1 3.