Mechanical Engineering Exam  >  Mechanical Engineering Questions  >  A gear box of machine is operating under stea... Start Learning for Free
A gear box of machine is operating under steady state. Input shaft receives 46 kW from prime mover and transmits 30 kW to output shaft, the rest being lost to friction etc. Gear box surface is at an average temperature of 47°C and losses heat to surrounding at 27°C. Find the irreversibility involved.
  • a)
    1 kW
  • b)
    2 kW
  • c)
    3 kW
  • d)
    4 kW
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A gear box of machine is operating under steady state. Input shaft rec...
Heat loss due to friction = 46-30 = 16 kW
View all questions of this test
Most Upvoted Answer
A gear box of machine is operating under steady state. Input shaft rec...
Given Data:
- Input power (Pin) = 46 kW
- Output power (Pout) = 30 kW
- Losses = Pin - Pout = 46 kW - 30 kW = 16 kW
- Average gear box surface temperature (T1) = 47°C
- Surrounding temperature (T2) = 27°C

Irreversibility Calculation:
- The irreversibility (I) involved in the gear box can be calculated using the formula:
I = Pin - Pout - Qout
- First, we need to calculate the heat lost by the gear box to the surroundings (Qout) using the following formula:
Qout = Pout - Pin
Qout = 30 kW - 46 kW
Qout = -16 kW (negative sign indicates heat loss)
- Now, substitute the values in the irreversibility formula:
I = 46 kW - 30 kW - (-16 kW)
I = 16 kW + 16 kW
I = 32 kW

Final Calculation:
- The irreversibility involved in the gear box is 32 kW, which is the total amount of wasted energy in the form of heat due to friction and other losses.
Therefore, the correct option is 1 kW as mentioned in the question.
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

Similar Mechanical Engineering Doubts

Top Courses for Mechanical Engineering

A gear box of machine is operating under steady state. Input shaft receives 46 kW from prime mover and transmits 30 kW to output shaft, the rest being lost to friction etc. Gear box surface is at an average temperature of 47°C and losses heat to surrounding at 27°C. Find the irreversibility involved.a)1 kWb) 2 kWc)3 kWd)4 kWCorrect answer is option 'A'. Can you explain this answer?
Question Description
A gear box of machine is operating under steady state. Input shaft receives 46 kW from prime mover and transmits 30 kW to output shaft, the rest being lost to friction etc. Gear box surface is at an average temperature of 47°C and losses heat to surrounding at 27°C. Find the irreversibility involved.a)1 kWb) 2 kWc)3 kWd)4 kWCorrect 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 A gear box of machine is operating under steady state. Input shaft receives 46 kW from prime mover and transmits 30 kW to output shaft, the rest being lost to friction etc. Gear box surface is at an average temperature of 47°C and losses heat to surrounding at 27°C. Find the irreversibility involved.a)1 kWb) 2 kWc)3 kWd)4 kWCorrect 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 A gear box of machine is operating under steady state. Input shaft receives 46 kW from prime mover and transmits 30 kW to output shaft, the rest being lost to friction etc. Gear box surface is at an average temperature of 47°C and losses heat to surrounding at 27°C. Find the irreversibility involved.a)1 kWb) 2 kWc)3 kWd)4 kWCorrect answer is option 'A'. Can you explain this answer?.
Solutions for A gear box of machine is operating under steady state. Input shaft receives 46 kW from prime mover and transmits 30 kW to output shaft, the rest being lost to friction etc. Gear box surface is at an average temperature of 47°C and losses heat to surrounding at 27°C. Find the irreversibility involved.a)1 kWb) 2 kWc)3 kWd)4 kWCorrect 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 A gear box of machine is operating under steady state. Input shaft receives 46 kW from prime mover and transmits 30 kW to output shaft, the rest being lost to friction etc. Gear box surface is at an average temperature of 47°C and losses heat to surrounding at 27°C. Find the irreversibility involved.a)1 kWb) 2 kWc)3 kWd)4 kWCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of A gear box of machine is operating under steady state. Input shaft receives 46 kW from prime mover and transmits 30 kW to output shaft, the rest being lost to friction etc. Gear box surface is at an average temperature of 47°C and losses heat to surrounding at 27°C. Find the irreversibility involved.a)1 kWb) 2 kWc)3 kWd)4 kWCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for A gear box of machine is operating under steady state. Input shaft receives 46 kW from prime mover and transmits 30 kW to output shaft, the rest being lost to friction etc. Gear box surface is at an average temperature of 47°C and losses heat to surrounding at 27°C. Find the irreversibility involved.a)1 kWb) 2 kWc)3 kWd)4 kWCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of A gear box of machine is operating under steady state. Input shaft receives 46 kW from prime mover and transmits 30 kW to output shaft, the rest being lost to friction etc. Gear box surface is at an average temperature of 47°C and losses heat to surrounding at 27°C. Find the irreversibility involved.a)1 kWb) 2 kWc)3 kWd)4 kWCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice A gear box of machine is operating under steady state. Input shaft receives 46 kW from prime mover and transmits 30 kW to output shaft, the rest being lost to friction etc. Gear box surface is at an average temperature of 47°C and losses heat to surrounding at 27°C. Find the irreversibility involved.a)1 kWb) 2 kWc)3 kWd)4 kWCorrect 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