Engine Theory And Construction Test Questions Flashcards
Which law may you sum up with two words: action and reaction?
Newton’s third law of motion
The ability to work is the definition of?
Energy
Which type of horsepower determines the performance of the engine- propeller combination?
Equivalent shaft
What two fluids combined are used to make up common jet fuel?
Kerosene and gasoline
What are the three method of heat transfer?
Radiation, convection, and conduction
Where is the highest point of temperature reached in the engine?
Combustion section
On an average, what percent of all the energy produced by the fuel is required to maintain the engine operating cycle?
60
What directs the gases onto the first stage turbine wheel blades in a jet engine?
Turbine stator
Vane-type fuel pumps used on jet engines are similar to?
Sliding vane air compressors
Which condition reduces efficiency of a centrifugal compressor?
Pressure pulsations
Stationary vanes are positioned between rotor discs in a compressor are used to?
Direct air and increase pressure
What is the most probable cause of a flameout of an engine flying at 40,000 feet with a constant rpm of 50 percent?
The rpm is to low
What are three adjectives to describe carbon monoxide?
Poisonous, odorless, and colorless
What is the most chemically correct ratio for burning fuel in a combustion chamber?
15:1
What type of flame speed are swirl-type fuel nozzles normally used to provide?
High
What is placed in front of the rotating blades in a multi-stage turbine engine?
Turbine nozzle vane assembly
The exhaust duct connects the turbine outlet and the?
Jet nozzle
What is the purpose of the exhaust duct?
Straighten exhaust gas flow
Which component in the augmentor creates local turbulence and reduces gases velocity?
Flameholder
Which type of defect appears on bearings as a result of of bearing parts striking together?
Nicks
Which type of defect appears on bearing as a result of small particles of foreign material becoming lodged between the rollers?
Grooves
Which type of bearing defect results from inadequate lubrication?
Galling
Which component reduces the engine rotor speed to the rpm required for accessories?
Reduction geartrain
To cause an accessory in a jet engine to operate at its most optimum speed, designer engineers must?
Change the gear ratio
When the engine is running above 23 percent rpm, the propeller brake is held in the release position by?
Reduction gearbox RGB system oil pressure
The purpose of the T56 safety coupling is to?
Disconnect the power section from the reduction gear box (RGB) assembly
For the safety coupling to disconnect the power unit from the reduction gearbox (RGB), torque must be between?
-4,200 and -7,200 inch pounds
The torque shaft can recouple to the RGB if torque decreases below approximately?
-6,000 inch pounds
The type of bearings used to support the T56 compressor rotor at the front and rear include the?
Roller on the front and ball on the rear
What supports the entire weight of the T56 turbine section?
Combustion section outer case
What is the purpose of the turbine section?
Convert energy into torque
What are used to retain the turbine buckets in the first stage wheel T56-A-15 engine?
Cover plate seals
What does the bottom surface of the AE2100D3 air inlet housing provide the mounting pad for?
Power unit accessory drive (PUAD)
What is the AE2100D3 power unit accessory drive (PUAD) mounted on the bottom of?
Forward end of the compressor air inlet housing
What does the T700 A-sump output shaft assembly provides a mounting surface for?
No. 1 and No. 2 bearing
F108 structural rigidity is obtained with a short length and by having only two main structures that are called?
Mainframes
What percentage of the total engine thrust does the secondary airflow on the F108 engine produce?
80
On the F108, what does the LPT shaft assembly connect the fan shaft to?
LPT rotor
Which accessory is not found on the F108 AGB?
Augmentor pump
On an F100-PW-220 engine, which stages of the compressor stator vanes are variable?
Fourth and fifth
What stage of compressor air provides anti-icing to the inlet guide vanes of the F119-PW-100 engine?
9th
Where is the total temperature sensor (Tt2) located on a F119-PW-100 engine?
Inside the inlet guide vane case at the 5:30 position
How many stages are on the high pressure compressor of a F119-PW-100 engine?
6
On the F119-PW-100 engine, what provides attaching points for the actuator fuel pump, main fuel pump, engine generator/breather pressurizing valve attached to the front, ODI gang drain, two chip detectors at 4:00 position, lubrication system and scavenge pump with two chip detectors, oil servicing and overfill adapter, oil flow management valve, and oil level sensor?
The gearbox assembly
How many fuel nozzles are in the augmentor assembly of the F119-PW-100 engine?
16
