Span gas is used for what process?

A To calibrate a gas analyzer to ensure it indicates correct gas concentrations.

B To find the zero point on a gas analyzer.

C The name of a gaseous state when the temperature of the vapor is the same as that of the liquid.

D To insure an inert atmosphere during the span of time when a system is being brought to a dry air condition from a flammable atmosphere.

AI Explanation

The correct answer is A) To calibrate a gas analyzer to ensure it indicates correct gas concentrations. Span gas is used to calibrate the span or upper end of a gas analyzer's measurement range. By introducing a known concentration of the target gas, the analyzer can be adjusted to accurately read that concentration, ensuring the instrument provides reliable measurements across its full operating range. The other options are incorrect because: B) is for the zero point, not the span; C) describes the boiling point, not a calibration gas; and D) refers to an inert atmosphere, not span gas.

Want to practice with timed exams?

Download Coast Guard Exams for the full exam experience with progress tracking.

Get the App

Question 1570 Deck General

Span gas is used for what process?

Want to practice with timed exams?