Barometers and open-tube manometers are two instruments that are used to measure pressure.Which statement is true?
A)Both measure gauge pressure
B)Both measure absolute pressure
C)Barometers measure gauge pressure and manometers measure absolute pressure
D)Barometers measure absolute pressure and manometers measure gauge pressure
E)Both measure an average of the absolute and gauge pressures

Question

Quizplus · Accepted Answer

Barometers measure atmospheric pressure, which is an absolute pressure measurement. Manometers, on the other hand, measure the difference in pressure between two points, which is a gauge pressure measurement. Therefore, barometers measure absolute pressure, and manometers measure gauge pressure.

Barometers and Open-Tube Manometers Are Two Instruments That Are Used