The maximum engine oil consumption per hour is expressed in which unit?

The maximum engine oil consumption per hour is expressed in which unit?

• A. Ounces per hour
• B. Liters per hour
• C. Pounds per hour
• D. Gallons per hour

Answer: (A)

Oil consumption rate is a volume flow rate, and for aviation maintenance data in US customary units, ounces per hour is the standard way to express how much oil the engine loses each hour. This unit fits the typical small amounts involved and lets you read and compare limits precisely. Although liters per hour would be the metric alternative, and pounds per hour would be a mass flow rate, those aren’t the conventional choices for this context. Gallons per hour would be too coarse for the usually small, hourly consumption rates. So the maximum engine oil consumption per hour is expressed in ounces per hour.

Oil consumption rate is a volume flow rate, and for aviation maintenance data in US customary units, ounces per hour is the standard way to express how much oil the engine loses each hour. This unit fits the typical small amounts involved and lets you read and compare limits precisely. Although liters per hour would be the metric alternative, and pounds per hour would be a mass flow rate, those aren’t the conventional choices for this context. Gallons per hour would be too coarse for the usually small, hourly consumption rates. So the maximum engine oil consumption per hour is expressed in ounces per hour.