Question

the more energy a fuel has, the more work it can do. what is the unit of measure used to determine the amount of energy a fuel has?

a. cetane rating

b. british thermal unit

c. octane rating

d. thermal expansion coefficient

Explanation:

• Option a: Cetane rating measures diesel fuel's ignition quality, not energy amount.
• Option b: British thermal unit (BTU) is a unit to measure the energy content of fuels (and other energy sources), as it quantifies the heat/energy a fuel can produce.
• Option c: Octane rating measures gasoline's resistance to knocking, not energy amount.
• Option d: Thermal expansion coefficient relates to how materials expand with temperature, not fuel energy.

Answer:

b. British thermal unit