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
DOE-HDBK-1012 §1-1 defines the Btu as the heat needed to raise one pound of water one degree Fahrenheit. Celsius and Kelvin increments are equal to each other but are not the basis of the Btu definition.
Cited:DOE-HDBK-1012 §1-1