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ASA POWERPLANT ORAL EXAM 2 LATEST
VERSIONS 2024-2025 ACTUAL EXAM COMPLETE 400
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED
A+||BRAND NEW!!
ASA POWERPLANT ORAL VERSION A
In what publication can a mechanic find the operating limitations for an aircraft engine? - ANSWER- In the TCDS for the engine
Who is authorized to perform the powerplant inspection that is required for an annual inspection? - ANSWER- An A&P mechanic who holds an IA
What are two types of compression checks that can be performed on an aircraft reciprocating engine? - ANSWER- A differential compression check and a direct compression check
What items are checked in a hot section inspection of a turbine engine? - ANSWER- The combustion sections is checked for cracks or distortion. The turbine wheel, the turbine case, and the 1 / 4
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exhaust section are checked for cracks, indications of overheating, and any indication of warpage, erosion, or burning
What is the most common type of damage that is found in the hot section of a turbine engine? - ANSWER- Cracks that are caused by the high concentration of heat in the hot section
Is the use of a checklist required when performing an annual or 100-hour inspection on an aircraft engine? - ANSWER- Yes
What inspection must be performed on an aircraft reciprocating engine if it has been operated on turbine fuel? - ANSWER- The inside of the cylinders must be inspected with borescope. The oil must be changed and the filters examined, and the engine given a careful run-up and operational check
In what units is the tachometer for a reciprocating engine calibrated? - ANSWER- In hundreds of RPM
In what units is the tachometer for a turbine engine calibrated? - ANSWER- In percent of the engine's rated takeoff RPM
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Where does the manifold pressure gage used on an aircraft reciprocating engine pick up the pressure it measures? - ANSWER- From the intake manifold of the engine
What are two types of pickups used for measuring the cylinder head temperature of a reciprocating engine? - ANSWER- The thermocoulple can be embedded in a gasket that is installed under the spark plug of the hottest running cylinder, or it can be in a bayonet that is held against the cylinder head by a spring
Why do most engine oil pressure gages have a restrictor in the line between the engine and the instrument? - ANSWER- The restrictor damps out pressure pulsations in the oil to keep the needle from oscillating
What is used to measure the fuel flow of a horizontally opposed, fuel-injected reciprocating engine? - ANSWER- A pressure gage that measures the pressure drop across injector nozzles
What is indicated if the needle of a ratiometer-type oil temperature indicator pegs to the high side of the dial as soon as the aircraft master switch is turned on? - ANSWER- There is an open in the bulb circuit that causes the instrument to see an infinite resistance. The higher the resistance in the bulb circuit, the higher the temperature indication 3 / 4
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What type of indicating system is used to measure the EGT of a turbine engine? - ANSWER- A set of thermocouples arranged in an averaging circuit. These thermocouples are installed in the tail pipe of the engine
What should a thermocouple-type cylinder head temperature indicator read when the engine is not operating? - ANSWER- The temp of the outside air
how does a torquemeter actually measure the torque produced by an engine? - ANSWER- A torquemeter is actually an oil pressure gage. The pressure it measures is produced in a torque sensor and is proportional to the amount of strain in the torsional shaft that drives the reduction gears of the turboprop engine
What two pressures are measured to get the Engine pressure Ratio of a turbojet engine? - ANSWER- The turbine discharge total pressure and the compressor inlet total pressure
Of what two materials are the thermocouples made that are used in a turbine engine EGT system? - ANSWER- Chromel and alumel
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