Practice Mechanical efficiency - 5.1 | 7. CE 261 Theory of Structures - part d | Structural Analysis
K12 Students

Academics

AI-Powered learning for Grades 8–12, aligned with major Indian and international curricula.

Professionals

Professional Courses

Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.

Games

Interactive Games

Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.

Typing
Memory
Math
English Adventures
Knowledge

5.1 - Mechanical efficiency

Enroll to start learning

You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.

Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is the formula for mechanical efficiency?

💡 Hint: Think about what you need to calculate both work output and energy input.

Question 2

Easy

If a machine has a useful output of 20 J and input energy of 25 J, what is the mechanical efficiency?

💡 Hint: Use the formula provided to find your answer.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What is mechanical efficiency?

  • The ability to do work
  • The ratio of useful work output to energy input
  • The total energy input to a machine

💡 Hint: Focus on what is measured against what is used.

Question 2

True or False: A higher mechanical efficiency indicates more waste in energy.

  • True
  • False

💡 Hint: Think about the goal of efficiency.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

A machine operates with an input energy of 600 J and produces a useful output of 420 J. If improvements are made that boost the input energy to 800 J without changing the output, what will be the new efficiency?

💡 Hint: Remember to use the efficiency formula for the new values.

Question 2

If two engines have mechanical efficiencies of 95% and 80%, respectively, and they both input 1000 J, how much useful work do they produce?

💡 Hint: Calculate each one using their respective efficiencies.

Challenge and get performance evaluation