Which abbreviation represents hour?

Which abbreviation represents hour?

• A. Kg
• B. Mcg
• C. Hour
• D. Mg

Answer: (C)

The concept being tested is recognizing different kinds of units and what they measure. In this set, three choices point to mass: kilograms and milligrams (and a nonstandard form for micrograms), while the word Hour names a unit of time. Time is a separate category from mass, so the only option that represents a time quantity is Hour. Even though the common abbreviation for hour is h or hr, this item presents the time unit by its name, making it the best choice among the options. The other choices describe mass units, not time.

The concept being tested is recognizing different kinds of units and what they measure. In this set, three choices point to mass: kilograms and milligrams (and a nonstandard form for micrograms), while the word Hour names a unit of time. Time is a separate category from mass, so the only option that represents a time quantity is Hour. Even though the common abbreviation for hour is h or hr, this item presents the time unit by its name, making it the best choice among the options. The other choices describe mass units, not time.