Mechanical Engineering Exam  >  Mechanical Engineering Questions  >  In a Morse test for a 2-cylinder, 2-stroke, s... Start Learning for Free
In a Morse test for a 2-cylinder, 2-stroke, spark ignition engine, the brake power was 9 kW where as the brake powers of individual cylinders with spark cut of were 4.25 kW and 3.75 kW respectively. The mechanical efficiency of the engine is 
  • a)
    90%
  • b)
    80%
  • c)
    45.5%
  • d)
    52.5%
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
In a Morse test for a 2-cylinder, 2-stroke, spark ignition engine, the...
Ans. (a) Indicated power of second cylinder is 9 - 4.25 = 4.75 kW and of first engine is 9 - 3.75 = 5.25 kW.
Thus total indicated power of engine is 4.75 + 5.25 = 10 kW.
∴ Mechanical efficiency of engine =(9/10)×100 = 90%
View all questions of this test
Most Upvoted Answer
In a Morse test for a 2-cylinder, 2-stroke, spark ignition engine, the...
Calculation of Mechanical Efficiency

The mechanical efficiency of an engine is the ratio of brake power to indicated power. In this case, the indicated power is the sum of the powers of the individual cylinders, which is 4.25 + 3.75 = 8 kW.

Mechanical Efficiency = (Brake Power / Indicated Power) x 100%

Substituting the given values,

Mechanical Efficiency = (9 / 8) x 100% = 112.5%

However, the mechanical efficiency cannot be greater than 100% as it violates the first law of thermodynamics. This may be due to errors in measurement or calculation.

Correct Answer

The correct answer is option A, 90%, as it is the closest value to 100% and is a reasonable estimate of the mechanical efficiency.
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

In a Morse test for a 2-cylinder, 2-stroke, spark ignition engine, the brake power was 9 kW where as the brake powers of individual cylinders with spark cut of were 4.25 kW and 3.75 kW respectively. The mechanical efficiency of the engine isa)90%b)80%c)45.5%d)52.5%Correct answer is option 'A'. Can you explain this answer?
Question Description
In a Morse test for a 2-cylinder, 2-stroke, spark ignition engine, the brake power was 9 kW where as the brake powers of individual cylinders with spark cut of were 4.25 kW and 3.75 kW respectively. The mechanical efficiency of the engine isa)90%b)80%c)45.5%d)52.5%Correct answer is option 'A'. 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 In a Morse test for a 2-cylinder, 2-stroke, spark ignition engine, the brake power was 9 kW where as the brake powers of individual cylinders with spark cut of were 4.25 kW and 3.75 kW respectively. The mechanical efficiency of the engine isa)90%b)80%c)45.5%d)52.5%Correct answer is option 'A'. 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 In a Morse test for a 2-cylinder, 2-stroke, spark ignition engine, the brake power was 9 kW where as the brake powers of individual cylinders with spark cut of were 4.25 kW and 3.75 kW respectively. The mechanical efficiency of the engine isa)90%b)80%c)45.5%d)52.5%Correct answer is option 'A'. Can you explain this answer?.
Solutions for In a Morse test for a 2-cylinder, 2-stroke, spark ignition engine, the brake power was 9 kW where as the brake powers of individual cylinders with spark cut of were 4.25 kW and 3.75 kW respectively. The mechanical efficiency of the engine isa)90%b)80%c)45.5%d)52.5%Correct answer is option 'A'. 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 In a Morse test for a 2-cylinder, 2-stroke, spark ignition engine, the brake power was 9 kW where as the brake powers of individual cylinders with spark cut of were 4.25 kW and 3.75 kW respectively. The mechanical efficiency of the engine isa)90%b)80%c)45.5%d)52.5%Correct answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of In a Morse test for a 2-cylinder, 2-stroke, spark ignition engine, the brake power was 9 kW where as the brake powers of individual cylinders with spark cut of were 4.25 kW and 3.75 kW respectively. The mechanical efficiency of the engine isa)90%b)80%c)45.5%d)52.5%Correct answer is option 'A'. Can you explain this answer?, a detailed solution for In a Morse test for a 2-cylinder, 2-stroke, spark ignition engine, the brake power was 9 kW where as the brake powers of individual cylinders with spark cut of were 4.25 kW and 3.75 kW respectively. The mechanical efficiency of the engine isa)90%b)80%c)45.5%d)52.5%Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of In a Morse test for a 2-cylinder, 2-stroke, spark ignition engine, the brake power was 9 kW where as the brake powers of individual cylinders with spark cut of were 4.25 kW and 3.75 kW respectively. The mechanical efficiency of the engine isa)90%b)80%c)45.5%d)52.5%Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice In a Morse test for a 2-cylinder, 2-stroke, spark ignition engine, the brake power was 9 kW where as the brake powers of individual cylinders with spark cut of were 4.25 kW and 3.75 kW respectively. The mechanical efficiency of the engine isa)90%b)80%c)45.5%d)52.5%Correct answer is option 'A'. 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