

MCQOPTIONS
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1. |
IN_CALIBRATION_OF_CO2_ANALYSER,_IN_ORDER_TO_ESTABLISH_ZERO_CALIBRATION_WHICH_OF_THE_FOLLOWING_IS_USED_AS_SAMPLE??$ |
A. | Oxygen |
B. | Hydrogen |
C. | Inert gases |
D. | Nitrogen |
Answer» D. Nitrogen | |