USCG Exam PracticeThermodynamics and heat exchangers
The British thermal unit (Btu) is defined as the heat required to raise the temperature of one pound of water by how much?
- A. One degree Celsius
- ✓ One degree FahrenheitCorrect
- C. One degree Rankine above absolute zero
- D. One degree Kelvin
Why B is correct
Per DOE-HDBK-1012 §1-1, the Btu is the heat needed to raise one pound of water one degree Fahrenheit. This is the standard unit of heat used in plant heat-balance calculations.
Cited:DOE-HDBK-1012 §1-1