The suction gauge reading range includes which of the following?

The suction gauge reading range includes which of the following?

• A. 3.5-4.5 inHg
• B. 4.0-4.9 inHg
• C. 5.0-6.0 inHg
• D. 4.5-5.4 inHg

Answer: (D)

Suction gauges are designed to read accuracy only within a specific window of vacuum values, which is the range the instrument is calibrated to display reliably. If the system’s acceptable suction lies between 4.5 and 5.4 inHg, then readings within that interval are within the gauge’s intended operating range and considered proper. Among the options, the range that sits entirely inside the gauge’s calibrated window is 4.5–5.4 inHg, making it the correct choice because it matches the instrument’s specified usable range. The other options either fall outside the gauge’s calibrated span or extend beyond what the gauge can reliably indicate.

Suction gauges are designed to read accuracy only within a specific window of vacuum values, which is the range the instrument is calibrated to display reliably. If the system’s acceptable suction lies between 4.5 and 5.4 inHg, then readings within that interval are within the gauge’s intended operating range and considered proper. Among the options, the range that sits entirely inside the gauge’s calibrated window is 4.5–5.4 inHg, making it the correct choice because it matches the instrument’s specified usable range. The other options either fall outside the gauge’s calibrated span or extend beyond what the gauge can reliably indicate.