PP212 EXAM QUESTIONS LATEST UPDATE 2024 WITH 100% DETAILED VERIFIED ANSWERS, Exams of Business Administration

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PP212 EXAM QUESTIONS

LATEST UPDATE 2024 WITH

100% DETAILED VERIFIED

ANSWERS

WHAT DOES THE OIL PRESSURE VALVE DO?

Regulate system pressure at any pump RPM HOW IS OIL & AIR REMOVED FROM BEARING AREAS? HOW IS OIL & AIR REMOVED FROM BEARING AREAS? Scavenge pump WHAT IS BLEED AIR USED FOR? Deicing, pressurization, heating and cooling What restricts engine inlet air at low RPM? variable inlet guide vanes The fuel control controls fuel to the engine and also? controls VSV, IGV, and bleed valves on some systems 800 PSI to 900 PSI would be used for? small engines What does the airframe boost pump do? Provide a constant supply of fuel to the engine driven pump Air bubbles in the fuel lines or pump cause?

foaming of fuel Entrained and free are the two types of? fuel contamination WATTS x Time=? Joules How many joules does a DC capacitor system use? DC system uses 3 to 4 joules Low tension ignition systems can be? may be intermittent or extended duty 2 ignition systems are required on? all turbines OFF, Continuous, Auto & Ground are? different modes of the ignition system Which system would be energized when the flaps are down? Auto What would power thrust reversers? Pneumatic actuating system powered by compressor discharge pressure or hydraulics Which part of a turbine engine imparts a high exit velocity to the exhaust gases? exhaust section Which turbine engine produces high tension spark by collapsing magnetic fields across coil windings? Induction What is expressed in watts and time? Energy

Tachometer, EPR & EGT would be affected when which system is turned on? Anti-ice system, bleed air High flash point would be a good characteristic of Lubricant What would the Fuel-Oil heat exchanger do the temperature of the fuel? increase the temperature of the fuel A positive displacement pump would be used for? lubrication system What would be the final protection for bearings? last chance filter Where does turbine engine oil pick up most of the heat? turbine bearings What will happen to the residual fuel if the dump valve fails? If the dump valve fails the residual fuel will travel to the fuel nozzles If you set the idle & max speed or EPR you would be? Trimming What controls blow-out or die-out? fuel control The trigger transformer would? step up the voltage to high voltage levels What would indicate wear in an engine? metal contaminants in the oil What would injecting water do to a turbine engine??

Increases thrust/ power output What is the purpose of the fuel manifold? Provides necessary plumbing to carry fuel to the nozzles in the combustion chamber What are the types of fuel nozzles? Simplex, duplex, vaporization At what position would drain valves be located? 6 O' Clock position or lowest position Length of duty cycle, availability of power, size of the engine would be? factors used in selecting a starter Which type of starter would be used on small turbine engines? electric starter Which starter has high torque to weight ratio? Pneumatic or air turbine What would be located at the outlet of the oil pump? oil pressure transmitter Fuel and air are used to cool? oil Why is there a bypass feature on the oil cooler? in case cooler becomes clogged What is the purpose of the oil jet nozzles? to lube bearings, gears, and moving parts with oil and remove heat and contaminates from components What bleeds excessive air at low RPM from the H/P compressor? compressor bleed

What would be located between the engine driven fuel pump & the fuel control? high pressure fuel filter What would be located at the outlet of the fuel filter or in the airframe tank? fuel temperature Which FAR covers stress analysis test for a turbine engine? FAR 33. Turbine engine oil tanks must have an expansion space of not less then 10% of the tank capacity. Which FAR covers this? FAR 33. Which FAR covers turbine ignition system starting? FAR 33. Turbine engine must not freeze before?

• 40 degrees F How many sparks are required per minute in the ignition system? 60 to 100 Low tension system use low voltage output of? 2,000 volts at 200 amps High tension system uses high voltage output up to? 28,000 volts at 200 amps High heat, high intensity spark keeps plug tip? clean and extends life of plug Igniter plug gap where center electrode protrudes past plug body? annular

Igniter plug gap where center electrode recessed into plug? constrained What is the purpose of the accessory gear box? To provide mounting and a drive system for engine accessories and some airframe systems Fuel pump, Fuel control, Oil pump, Air-oil separator, tach generator, alternator, starter, oil tank are all? engine accessories The starter drives the? accessory gearbox and engine The purpose of the engine lube system is to? lubricate, cool, and clean Which bearing type carries heavy radial loads? roller type Which bearing carries moderate radial and heavy axial loads? ball type Max operating time without oil pressure is? 2 minutes Turbine engines use? synthetic oil only Oil cooler is in pressure system, oil hot entering tank hot tank system Oil cooler is return system, oil cool when entering tank cold tank system Receives oil from oil supply tank, pressurizes oil, sends through filter, delivers to bearings

pressure system Picks up oil from bearing compartments and returns oil to tank scavenge systems Equalizes pressure throughout gear box, separates air from oil, and vents air overboard Breather and pressurization system Which pump type is the most common? gear Where is the pressure relief valve usually located? main pump outlet side What type of system does not have a regulator? full flow system What are the three types of oil jet nozzles? fluid stream, air/oil, under race lubrication Delta P indicators are used for? indication of bypass in oil system Where is the low pressure fuel filter located? Low pressure located between tank and engine driven pump. What uses 1500 psi or higher? large engines Where is the high pressure fuel filter located? High pressure located between engine driven pump and fuel control Water injection systems increase thrust/power by? 10 to 15 % by increasing the mass flowing though the engine

Water is injected at the? compressor inlet or the diffuser Methyl or Ethyl alcohol may be mixed with the water to? reduce the freezing point of the water Increases thrust output by reheating the exhaust gasses to increase their acceleration as they leave the engine? afterburners Afterburners are basically a ___ ____ bolted onto the back of a gas turbine engine ram jet Small band that goes around diffuser, allows bleed air to escape at low RPM bleed bands When a bleed band or valve closes the engine RPM will increase 2 to 3% Changes angle of attack of air on to the next stage of rotors, controlled by calculated fuel from the fuel control variable stator vanes Changes angle of attack of inlet air on to the first stage rotor, controlled by calculated fuel from the fuel control variable inlet guide vanes