When heavier liquid fuels are used, heat must be applied to reduce _________.
A. density
B. viscosity
C. temperature
D. pressure
A. Incorrect. When heavier liquid fuels are used, heat must be applied to reduce viscosity.
B. Correct. When heavier liquid fuels are used, heat must be applied to reduce viscosity.
C. Incorrect. When heavier liquid fuels are used, heat must be applied to reduce viscosity.
D. Incorrect. When heavier liquid fuels are used, heat must be applied to reduce viscosity.
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