Mechanical Engineering Exam > Mechanical Engineering Questions > Assertion (A): Compared to a turbo-jet engine...
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Assertion (A): Compared to a turbo-jet engine, a turbo-prop engine has a higher power for take-off and higher propulsive efficiency at low speeds.
Reason (R): By mounting the propeller on the turbine shaft, the propeller can be runat a very high speed to obtain higher efficiency.
Reason (R): By mounting the propeller on the turbine shaft, the propeller can be runat a very high speed to obtain higher efficiency.
- a)Both A and R are individually true and R is the correct explanation of A
- b)Both A and R are individually true but R is not the correct explanation of A
- c)A is true but R is false
- d)A is false but R is true
Correct answer is option 'C'. Can you explain this answer?
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Assertion (A): Compared to a turbo-jet engine, a turbo-prop engine has...
Ans. (c)
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Assertion (A): Compared to a turbo-jet engine, a turbo-prop engine has...
Assertion (A) Analysis
The assertion states that compared to a turbo-jet engine, a turbo-prop engine has a higher power for take-off and higher propulsive efficiency at low speeds. This is true because:
- Higher Power for Take-off: Turbo-prop engines are designed to produce more torque at lower speeds, making them more effective for take-off in regional and short-haul flights.
- Propulsive Efficiency at Low Speeds: Turbo-prop engines operate more efficiently at lower speeds, allowing them to convert a greater portion of fuel energy into useful work, particularly during take-off and landing phases.
Reason (R) Analysis
The reason states that by mounting the propeller on the turbine shaft, the propeller can be run at a very high speed to obtain higher efficiency. This statement is misleading because:
- High-Speed Operation: While the propeller is indeed mounted on the turbine shaft, turbo-prop engines typically run the propeller at lower rotational speeds to enhance efficiency, particularly in the subsonic speed range.
- Efficiency Relationship: The efficiency of a turbo-prop engine is not solely dependent on high speed; instead, it benefits from the optimal design of the propeller and engine for low-speed operations.
Conclusion
Based on the analyses:
- Correct Answer: A is true but R is false.
- Explanation: While the assertion about turbo-prop engines is correct, the reason provided does not accurately explain why turbo-prop engines are more efficient at low speeds. Thus, the correct answer is option 'C'.
The assertion states that compared to a turbo-jet engine, a turbo-prop engine has a higher power for take-off and higher propulsive efficiency at low speeds. This is true because:
- Higher Power for Take-off: Turbo-prop engines are designed to produce more torque at lower speeds, making them more effective for take-off in regional and short-haul flights.
- Propulsive Efficiency at Low Speeds: Turbo-prop engines operate more efficiently at lower speeds, allowing them to convert a greater portion of fuel energy into useful work, particularly during take-off and landing phases.
Reason (R) Analysis
The reason states that by mounting the propeller on the turbine shaft, the propeller can be run at a very high speed to obtain higher efficiency. This statement is misleading because:
- High-Speed Operation: While the propeller is indeed mounted on the turbine shaft, turbo-prop engines typically run the propeller at lower rotational speeds to enhance efficiency, particularly in the subsonic speed range.
- Efficiency Relationship: The efficiency of a turbo-prop engine is not solely dependent on high speed; instead, it benefits from the optimal design of the propeller and engine for low-speed operations.
Conclusion
Based on the analyses:
- Correct Answer: A is true but R is false.
- Explanation: While the assertion about turbo-prop engines is correct, the reason provided does not accurately explain why turbo-prop engines are more efficient at low speeds. Thus, the correct answer is option 'C'.
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Assertion (A): Compared to a turbo-jet engine, a turbo-prop engine has a higher power for take-off and higher propulsive efficiency at low speeds.Reason (R): By mounting the propeller on the turbine shaft, the propeller can be runat a very high speed to obtain higher efficiency.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'C'. Can you explain this answer?
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Assertion (A): Compared to a turbo-jet engine, a turbo-prop engine has a higher power for take-off and higher propulsive efficiency at low speeds.Reason (R): By mounting the propeller on the turbine shaft, the propeller can be runat a very high speed to obtain higher efficiency.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Assertion (A): Compared to a turbo-jet engine, a turbo-prop engine has a higher power for take-off and higher propulsive efficiency at low speeds.Reason (R): By mounting the propeller on the turbine shaft, the propeller can be runat a very high speed to obtain higher efficiency.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): Compared to a turbo-jet engine, a turbo-prop engine has a higher power for take-off and higher propulsive efficiency at low speeds.Reason (R): By mounting the propeller on the turbine shaft, the propeller can be runat a very high speed to obtain higher efficiency.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'C'. Can you explain this answer?.
Assertion (A): Compared to a turbo-jet engine, a turbo-prop engine has a higher power for take-off and higher propulsive efficiency at low speeds.Reason (R): By mounting the propeller on the turbine shaft, the propeller can be runat a very high speed to obtain higher efficiency.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Assertion (A): Compared to a turbo-jet engine, a turbo-prop engine has a higher power for take-off and higher propulsive efficiency at low speeds.Reason (R): By mounting the propeller on the turbine shaft, the propeller can be runat a very high speed to obtain higher efficiency.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): Compared to a turbo-jet engine, a turbo-prop engine has a higher power for take-off and higher propulsive efficiency at low speeds.Reason (R): By mounting the propeller on the turbine shaft, the propeller can be runat a very high speed to obtain higher efficiency.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'C'. Can you explain this answer?.
Solutions for Assertion (A): Compared to a turbo-jet engine, a turbo-prop engine has a higher power for take-off and higher propulsive efficiency at low speeds.Reason (R): By mounting the propeller on the turbine shaft, the propeller can be runat a very high speed to obtain higher efficiency.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
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ample number of questions to practice Assertion (A): Compared to a turbo-jet engine, a turbo-prop engine has a higher power for take-off and higher propulsive efficiency at low speeds.Reason (R): By mounting the propeller on the turbine shaft, the propeller can be runat a very high speed to obtain higher efficiency.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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