In each blank, try to type in the
word that is missing. If you've
typed in the correct word, the
blank will turn green.
If your not sure what answer should be entered, press the space bar and the next missing letter will be displayed. When you are all done, you should look back over all your answers and review the ones in red. These ones in red are the ones which you needed help on. Question: explain the main difference and of turbofan over turbo jet engines.Answer: a turbofan engine uses a fan to bypass some air around the core and to provide thrust. the advantage is that this provides additional thrust without increasing fuel flow. Question: name the major in a gas turbine engine.(7)Answer: air inlet, section, combustion section, turbine section, exhaust section, gearbox and accessory section. Question: what determines the amount of through a turbine engine?(3)Answer: the forward speed of the aircraft, speed, and air density. Question: name the two types of compressors commonly used in turbine .Answer: axial and centrifugal flow . Question: name two(3) different methods for attaching turbine rotor blades to the rotor disk.Answer: -type root, bulb-type root, fir tree-type root. Question: what is a split compressor ?Answer: also called dual or twin spool compressors, these are to the turbine section with two rotor shafts, one inside the other. Question: what are the different types of combustion chambers(4) used in turbine ?Answer: can, , can-annular, and reverse flow annular. Question: what prevents the chamber from burning? Answer: cooling air the inside of the liner. Question: what is the purpose of the tubes attached between can-type combustion chambers?Answer: for flame propagation start. Question: what function do axial flow nozzles perform?Answer: they direct the mass airflow to drive the turbine rotor at a specific . Question: how is thermal stress relieved on a disk?Answer: by bleed air onto the face of the disk, or by grooves being cut into the disk. Question: what are carbon seals used for in engines?Answer: they are used as oil seals for the rotor shaft . Question: what are the possible causes(2) for a turbojet or turbofan engine having high exhaust gas temperatures, low r.p.m., and high fuel flow at all pressure ratios?Answer: damage or loss of turbine efficiency due to wear. Question: why are compressor washes (2) and what methods are commonly used(2)?Answer: to remove any from the compressor section and improve engine performance. the fluid wash and abrasive grit wash are commonly used. Question: how can you tell if a or turbojet engine is out of trim?Answer: there will be high exhaust gas temperature at target engine ratio for takeoff power. Question: name the different types of compressor blade damage that may be during inspection(8).Answer: dents, cracks, galling, pitting, , burrs, burns, gouges. Question: what kind of markers can be used to mark the in hot and cold sections during repair(3)?Answer: layout dye, felt tip , chalk. Question: how does humidity affect turbine engines?Answer: negligible . |
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Justin84
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