What is the term for the measure of pressure expressed as the height, in feet, of a column of fuel?

What is the term for the measure of pressure expressed as the height, in feet, of a column of fuel?

• A. Feet of head
• B. PSI
• C. Bar
• D. Pascal

Answer: (A)

Pressure expressed as the height of a column of fuel is called feet of head. In fluids, pressure can be described by the height of a fluid column needed to exert that pressure, which ties into P = ρ g h. Expressing pressure as head shows how tall a column of the same fuel would have to be to produce the same pressure. This head concept is common in fuel and hydraulic systems. The other terms—PSI, Bar, and Pascal—are direct units of pressure per area, not a height of a fluid column.

Pressure expressed as the height of a column of fuel is called feet of head. In fluids, pressure can be described by the height of a fluid column needed to exert that pressure, which ties into P = ρ g h. Expressing pressure as head shows how tall a column of the same fuel would have to be to produce the same pressure. This head concept is common in fuel and hydraulic systems. The other terms—PSI, Bar, and Pascal—are direct units of pressure per area, not a height of a fluid column.