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Energy Efficiency and Transformation

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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 (B) Signup and view all the answers

What is the unit of temperature measurement?

Celsius, Fahrenheit, or Kelvin (C) Signup and view all the answers

What is the definition of heat?

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

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

To sustain the reservoir pressure (A) Signup and view all the answers

What is the difference between heat and work?

Heat is energy transferred while work is energy done (C) 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 (A) Signup and view all the answers

What is the unit of measurement for RPMs?

Revolutions per minute (A) Signup and view all the answers