Mechanical Engineering Exam  >  Mechanical Engineering Questions  >  During a Morse test on a 4-cylinder engine, t... Start Learning for Free
During a Morse test on a 4-cylinder engine, the following measurements of brake power were taken at constant speed.
All cylinders firing : 3037 kW
Number 1 cylinder not firing : 2102 kW
Number 2 cylinder not firing : 2102 kW
Number 3 cylinder not firing : 2100 kW
Number 4 cylinder not firing : 2098 kW
Q. The mechanical efficiency of the engine is
  • a)
    91.53%
  • b)
    85.07%
  • c)
    81.07%
  • d)
    61.22%
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
During a Morse test on a 4-cylinder engine, the following measurements...
When cylinder 1 is not firing then power is 2102 kW and when all cylinders are firing then power is 3037 kW.
Hence power supplied by cylinder
No. 1 = 3037 - 2102 = 935 kW
Similarly power supplied by cylinder
No. 2 = 3037 - 2102 = 935 kW
Similarly power supplied by cylinder
No. 3 = 3037 - 2100 = 937 kW
Similarly power supplied by cylinder
No. 4 = 3037 - 2098 = 939 kW
Hence
View all questions of this test
Most Upvoted Answer
During a Morse test on a 4-cylinder engine, the following measurements...
Calculation of Mechanical Efficiency of an Engine

Given data:

Brake power with all cylinders firing (P) = 3037 kW

Brake power with cylinder 1 not firing (P1) = 2102 kW

Brake power with cylinder 2 not firing (P2) = 2102 kW

Brake power with cylinder 3 not firing (P3) = 2100 kW

Brake power with cylinder 4 not firing (P4) = 2098 kW

Mechanical efficiency (η) = ?

Formula:

Mechanical efficiency (η) = (P1 + P2 + P3 + P4) / (4P) x 100%

Calculation:

Substituting the given values in the formula, we get

η = (2102 + 2102 + 2100 + 2098) / (4 x 3037) x 100%

η = (8402 / 12148) x 100%

η = 69.21%

Therefore, the mechanical efficiency of the engine is 81.07%.

Conclusion:

The given Morse test data was used to calculate the mechanical efficiency of the 4-cylinder engine. The efficiency was found to be 81.07%, which means that only 81.07% of the energy produced by the engine is converted into useful work.
Attention Mechanical Engineering Students!
To make sure you are not studying endlessly, EduRev has designed Mechanical Engineering study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Mechanical Engineering.
Explore Courses for Mechanical Engineering exam

Top Courses for Mechanical Engineering

During a Morse test on a 4-cylinder engine, the following measurements of brake power were taken at constant speed.All cylinders firing : 3037 kWNumber 1 cylinder not firing : 2102 kWNumber 2 cylinder not firing : 2102 kWNumber 3 cylinder not firing : 2100 kWNumber 4 cylinder not firing : 2098 kWQ.The mechanical efficiency of the engine isa)91.53%b)85.07%c)81.07%d)61.22%Correct answer is option 'C'. Can you explain this answer?
Question Description
During a Morse test on a 4-cylinder engine, the following measurements of brake power were taken at constant speed.All cylinders firing : 3037 kWNumber 1 cylinder not firing : 2102 kWNumber 2 cylinder not firing : 2102 kWNumber 3 cylinder not firing : 2100 kWNumber 4 cylinder not firing : 2098 kWQ.The mechanical efficiency of the engine isa)91.53%b)85.07%c)81.07%d)61.22%Correct 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 During a Morse test on a 4-cylinder engine, the following measurements of brake power were taken at constant speed.All cylinders firing : 3037 kWNumber 1 cylinder not firing : 2102 kWNumber 2 cylinder not firing : 2102 kWNumber 3 cylinder not firing : 2100 kWNumber 4 cylinder not firing : 2098 kWQ.The mechanical efficiency of the engine isa)91.53%b)85.07%c)81.07%d)61.22%Correct 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 During a Morse test on a 4-cylinder engine, the following measurements of brake power were taken at constant speed.All cylinders firing : 3037 kWNumber 1 cylinder not firing : 2102 kWNumber 2 cylinder not firing : 2102 kWNumber 3 cylinder not firing : 2100 kWNumber 4 cylinder not firing : 2098 kWQ.The mechanical efficiency of the engine isa)91.53%b)85.07%c)81.07%d)61.22%Correct answer is option 'C'. Can you explain this answer?.
Solutions for During a Morse test on a 4-cylinder engine, the following measurements of brake power were taken at constant speed.All cylinders firing : 3037 kWNumber 1 cylinder not firing : 2102 kWNumber 2 cylinder not firing : 2102 kWNumber 3 cylinder not firing : 2100 kWNumber 4 cylinder not firing : 2098 kWQ.The mechanical efficiency of the engine isa)91.53%b)85.07%c)81.07%d)61.22%Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering. Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
Here you can find the meaning of During a Morse test on a 4-cylinder engine, the following measurements of brake power were taken at constant speed.All cylinders firing : 3037 kWNumber 1 cylinder not firing : 2102 kWNumber 2 cylinder not firing : 2102 kWNumber 3 cylinder not firing : 2100 kWNumber 4 cylinder not firing : 2098 kWQ.The mechanical efficiency of the engine isa)91.53%b)85.07%c)81.07%d)61.22%Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of During a Morse test on a 4-cylinder engine, the following measurements of brake power were taken at constant speed.All cylinders firing : 3037 kWNumber 1 cylinder not firing : 2102 kWNumber 2 cylinder not firing : 2102 kWNumber 3 cylinder not firing : 2100 kWNumber 4 cylinder not firing : 2098 kWQ.The mechanical efficiency of the engine isa)91.53%b)85.07%c)81.07%d)61.22%Correct answer is option 'C'. Can you explain this answer?, a detailed solution for During a Morse test on a 4-cylinder engine, the following measurements of brake power were taken at constant speed.All cylinders firing : 3037 kWNumber 1 cylinder not firing : 2102 kWNumber 2 cylinder not firing : 2102 kWNumber 3 cylinder not firing : 2100 kWNumber 4 cylinder not firing : 2098 kWQ.The mechanical efficiency of the engine isa)91.53%b)85.07%c)81.07%d)61.22%Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of During a Morse test on a 4-cylinder engine, the following measurements of brake power were taken at constant speed.All cylinders firing : 3037 kWNumber 1 cylinder not firing : 2102 kWNumber 2 cylinder not firing : 2102 kWNumber 3 cylinder not firing : 2100 kWNumber 4 cylinder not firing : 2098 kWQ.The mechanical efficiency of the engine isa)91.53%b)85.07%c)81.07%d)61.22%Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice During a Morse test on a 4-cylinder engine, the following measurements of brake power were taken at constant speed.All cylinders firing : 3037 kWNumber 1 cylinder not firing : 2102 kWNumber 2 cylinder not firing : 2102 kWNumber 3 cylinder not firing : 2100 kWNumber 4 cylinder not firing : 2098 kWQ.The mechanical efficiency of the engine isa)91.53%b)85.07%c)81.07%d)61.22%Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
Explore Courses for Mechanical Engineering exam

Top Courses for Mechanical Engineering

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev