Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

10 Questions

0 Views

Energy Efficiency and Transformation

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the main reason why devices are not 100% efficient?

Some energy is transferred into a non-useful form (correct)

The device is not well-maintained

The machine's purpose is not clear

The input energy is not sufficient

What is the purpose of the separator in a geothermal powerplant?

To generate electricity

To create steam from hot fluids

To extract hot fluids from underground

To separate water and steam (correct)

What is the formula for efficiency?

Output energy / Input energy (correct)

Input energy / Output energy

Total energy output / Useful energy output

Useful energy output / Total energy output

In a 4-stroke gas engine, what is the purpose of the spark plug?

To ignite the air and fuel mixture Signup and view all the answers

What is the unit of temperature measurement?

Celsius, Fahrenheit, or Kelvin Signup and view all the answers

What is the definition of heat?

Energy transferred due to a difference in temperature Signup and view all the answers

What is the purpose of the reinjection pump in a geothermal powerplant?

To sustain the reservoir pressure Signup and view all the answers

What is the difference between heat and work?

Heat is energy transferred while work is energy done Signup and view all the answers

What is the purpose of the intake manifold in a 4-stroke gas engine?

To distribute air and fuel to the cylinders Signup and view all the answers

What is the unit of measurement for RPMs?

Revolutions per minute Signup and view all the answers