Turbine Engines-Powerplant (Questions with correct answers)
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Course
Engineering
Institution
Engineering
1 (8108) - At what point in an axial-flow turbojet engine will the highest gas pressures occur? correct answers C- At the compressor outlet.
2 (8109) - One function of the nozzle diaphragm in a turbine engine is to correct answers C- Direct the flow of gases to strike the turbine blades at the d...
Turbine Engines-Powerplant (Questions with correct answers)
1 (8108) - At what point in an axial-flow turbojet engine will the highest gas pressures occur? correct answers C- At the compressor outlet.
2 (8109) - One function of the nozzle diaphragm in a turbine engine is to correct answers C- Direct the flow of gases to strike the turbine blades at the desired angle.
3 (8110) - What is the profile of a turbine engine compressor blade? correct answers B- A reduced blade tip thickness.
4 (8111) - The fan rotational speed of a dual axial compressor forward fan engine is the same as the correct answers A- low-pressure compressor.
5 (8112) - The abbreviation Pt7 used in turbine engine terminology means correct answers C- the
total pressure at station No. 7.
6 (8113) - The blending of blades and vanes in a turbine engine correct answers B- should be performed parallel to the length of the blade using smooth contours to minimize stress points.
7 (8114) - What turbine engine section provides for proper mixing of the fuel and air? correct answers A- Combustion section.
8 (8115) - In a gas turbine engine, combustion occurs at a constant correct answers B- pressure.
9 (8116) - Which statement is true regarding jet engines? correct answers B- At the higher engine
speeds, thrust increases rapidly with small increases in RPM.
10 (8117) - Some high-volume turboprop and turbojet engines are equipped with two-spool or split compressors. When these engines are operated at high altitudes, the correct answers A- low-
pressure rotor will increase in speed as the compressor load decreases in the lower density air.
11 (8118) - Turbine nozzle diaphragms located on the upstream side of each turbine wheel, are used in the gas turbine engine to correct answers C- increase the velocity of the heated gases flowing past this point.
12 (8119) - Where is the highest gas pressure in a turbojet engine? correct answers C- In the entrance of the burner section.
13 (8120) - An exhaust cone placed aft of the turbine in a jet engine will cause the pressure in the
first part of the exhaust duct to correct answers A- increase and the velocity to decrease.
14 (8121) - What is the function of the stator vane assembly at the discharge end of a typical axial-flow compressor? correct answers A- To straighten airflow to eliminate turbulence. 15 (8122) - The turbine section of a jet engine correct answers C- drives the compressor section.
16 (8123) - When starting a turbine engine, correct answers A- a hot start is indicated if the exhaust gas temperature exceeds specified limits.
17 (8124) - In the dual axial-flow or twin spool compressor system, the first stage turbine drives the correct answers B- N(2) compressor.
18 (8125) - During inspection, turbine engine components exposed to high temperatures may only be marked with such materials as allowed by the manufacturer. These materials generally include 1. layout dye.2. commercial felt tip marker.3. wax or grease pencil.4. chalk.5. graphite lead pencil. correct answers A- 1, 2, and 4.
19 (8126) - When starting a turbine engine, a hung start is indicated if the engine correct answers
B- fails to reach idle RPM.
20 (8127) - What are the two basic elements of the turbine section in a turbine engine? correct answers C- Stator and rotor.
21 (8128) - The function of the exhaust cone assembly of a turbine engine is to correct answers C- straighten and collect the exhaust gases into a solid exhaust jet.
22 (8129) - What are the two functional elements in a centrifugal compressor? correct answers C- Impeller and diffuser.
23 (8130) - What must be done after the fuel control unit has been replaced on an aircraft gas turbine engine? correct answers C- Retrim the engine.
24 (8131) - If, during inspection at engine overhaul, ball or roller bearings are found to have magnetism but otherwise have no defects, they correct answers C- must be degaussed before use.
25 (8132) - A turbine engine compressor which contains vanes on both sides of the impeller is a correct answers A- double entry centrifugal compressor.
26 (8133) - What is the first engine instrument indication of a successful start of a turbine engine? correct answers C- A rise in the exhaust gas temperature.
27 (8134) - Some engine manufacturers of twin spool gas turbine engines identify turbine discharge pressure in their maintenance manuals as correct answers A- Pt7.
28 (8135) - Who establishes the recommended operating time between overhauls (TBO) of a turbine engine used in general aviation? correct answers A- The engine manufacturer.
29 (8136) - The basic gas turbine engine is divided into two main sections: the cold section and the hot section.(1) The cold section includes the engine inlet, compressor, and turbine sections.
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