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Questions and Answers
In the context of power usage, what is the average daily power usage for electricity and gas combined?
In the context of power usage, what is the average daily power usage for electricity and gas combined?
- 13 kWh - 10,800 kJ
- 13 kWh + 10,800 kJ (correct)
- 13 kWh * 10,800 kJ
- 13 kWh / 10,800 kJ
What is the formula for mechanical energy efficiency?
What is the formula for mechanical energy efficiency?
- Efficiency = (Total energy input / Useful energy output) * 100%
- Efficiency = (Useful energy output / Total energy input) * 100% (correct)
- Efficiency = Useful energy output - Total energy input
- Efficiency = Total energy input - Useful energy output
What is the efficiency of an engine that produces 7 kW of electricity from a 29 MJ/h input?
What is the efficiency of an engine that produces 7 kW of electricity from a 29 MJ/h input?
- 87% (correct)
- 70%
- 83%
- 100%
What is the formula to convert temperature from Celsius to Kelvin?
What is the formula to convert temperature from Celsius to Kelvin?
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What is the temperature in Fahrenheit if the temperature in Celsius is 25.5°C?
What is the temperature in Fahrenheit if the temperature in Celsius is 25.5°C?
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