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Gas Turbine Engines Part-66 Questions with 100% Correct Answers | Rated A+
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Gas Turbine Engines Part-66 Questions with 100% Correct Answers | Rated A+ 1. On an axial flow, dual compressor forward fan engine, the fan turns the same speed as the. Option A. low pressure turbine. Option B. high pressure compressor. Option C. forward turbine wheel. - low pressure turbine....

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  • December 8, 2024
  • 314
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • Gas Turbine Mechanic
  • Gas Turbine Mechanic

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Gas Turbine Engines Part-66 Questions

with 100% Correct Answers | Rated A+


1. On an axial flow, dual compressor forward fan engine, the fan turns the

same speed as the.

Option A. low pressure turbine.

Option B. high pressure compressor.

Option C. forward turbine wheel. - ✔✔low pressure turbine.

Explanation. Rolls Royce The Jet engine Page 6 refers.

2. A turbo jet engine gives.

Option A. large acceleration to a small mass of air.

Option B. large acceleration to a large weight of air.

Option C. small acceleration to a large mass of air. - ✔✔large acceleration

to a small mass of air.

Explanation. Rolls Royce The Jet engine Page 2/3 refer.

3. The basic gas turbine engine is divided into two main sections: the cold

section and the hot section.




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,Option A. The cold section includes the engine inlet, compressor, and

turbine sections.

Option B. The hot section includes the combustor, diffuser, and exhaust.

Option C. The hot section includes the combustor, turbine, and exhaust. -

✔✔The hot section includes the combustor, turbine, and exhaust.

Explanation. NIL.

4. A jet engine derives its thrust by.

Option A. drawing air into the compressor.

Option B. impingement of the propelling gases on the outside air.

Option C. reaction of the propelling gases. - ✔✔reaction of the propelling

gases.

Explanation. Newtons third law applies- Rolls Royce The Jet engine Page

2/3 refers.

5. Which of the following might be used to identify turbine discharge

pressure?.

Option A. Pt7.

Option B. Pt2.

Option C. Tt7. - ✔✔Pt7.

Explanation. Jeppesen A&P Powerplant Textbook 3-5.

6. In a free turbine.
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,Option A. there is a clutch between compressor and power output shaft.

Option B. there is a direct drive with a free-wheel unit.

Option C. there is no mechanical connection with the compressor. -

✔✔there is no mechanical connection with the compressor.

Explanation. Rolls Royce The Jet engine Page 5 refers.

7. Bernoulli's Theorem states that at any point in a flow of gas.

Option A. the static pressure and dynamic pressure are equal.

Option B. the static pressure is less than the dynamic pressure.

Option C. the total energy remains constant. - ✔✔the total energy remains

constant.

Explanation. See Chapter 2 of Rolls Royce The Jet Engine.

8. The working fluid of a gas turbine engine is.

Option A. gasoline.

Option B. kerosene.

Option C. air. - ✔✔air.

Explanation. Kerosene provides the energy to drive the air.

9. Which statements are true regarding aircraft engine propulsion?.

Option A. Turbojet and turbofan engines impart a relatively large amount of

acceleration to a smaller mass of air.



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, Option B. In modern turboprop engines, nearly 50 percent of the exhaust

gas energy is extracted by turbines to drive the propeller and compressor

with the rest providing exhaust thrust.

Option C. An engine driven propeller imparts a relatively small amount of

acceleration to a large mass of air. - ✔✔An engine driven propeller imparts

a relatively small amount of acceleration to a large mass of air.

Explanation. Jeppesen A&P Powerplant Textbook 3-43.

10. As subsonic air flows through a convergent nozzle the velocity.

Option A. decreases.

Option B. increases.

Option C. remains constant. - ✔✔increases.

Explanation. Bernoulli's Theorem again.

11. In a twin spool compressor system, the first stage turbine drives the.

Option A. N2 compressor.

Option B. N1 and N2 compressors.

Option C. N1 compressor. - ✔✔N2 compressor.

Explanation. Jeppesen A&P Powerplant Textbook 3-18.

12. At what point in an axial flow turbojet engine will the highest gas

pressures occur?.

Option A. At the compressor outlet.
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