【Daily Question 20090225】Backflow fans and differential pressure transmitters
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1. When stopping the meter for inspection of the backblast instrument, the _________ valve should be closed first, followed by the _________ valve. Answer: Once, for backflow ventilation. 2. Differential pressure transmitters, classified by the differential pressure they measure, generally fall into five categories: ______ differential pressure, ______ differential pressure, ______ differential pressure, ______ differential pressure, and ______ differential pressure. Answer: Micro Low Medium High Large
Once, reverse blowing: low, medium, high, large. O(∩_∩)O Haha~ I’ll also contribute by answering the questions posed by the senior technicians.
Once: reverse airflow – low, medium, high, large
1. One reverse blow 2. Low, Medium, High, Large
1. One reverse blow 2. Low, Medium, High, Large
1. One reverse blow 2. Low, Medium, High, Large
1. When stopping the gauge for backflow inspection, the ___ valve should be closed first, once, followed by closing the (backflow) valve. 2. Differential pressure transmitters, classified according to the differential pressure they measure, generally fall into five categories: ___micro___ differential pressure, ____low__ differential pressure, ___medium___ differential pressure, ___high___ differential pressure, and ____large__ differential pressure.
Answer: 1. Once； Counterwind. 2、Micro ； Low ； middle ； High ； Big.
1. One reverse blow 2. Low, Medium, High, Large
Once: reverse airflow – low, medium, high, large
1. One reverse blow 2. Low, Medium, High, Large
1. When stopping the meter for inspection of the backflow instrument, the valve should be closed _1 time_ first, followed by closing the (backflow) branch valve. 2. Differential pressure transmitters, classified according to the differential pressure they measure, generally fall into five categories: _micro_ differential pressure, _low_ differential pressure, _medium_ differential pressure, _high_ differential pressure, and _very high_ differential pressure.
Once: reverse airflow – low, medium, high, large
1. One reverse blow 2. Low, Medium, High, Large
1. One reverse blow 2. Low, Medium, High, Large
1. When stopping the meter for inspection of the backflow prevention device, the valve in front of the pressure reducing valve should be closed first, followed by the backflow valve. 2. Differential pressure transmitters can be classified into five categories based on the differential pressure they measure: micro-differential pressure, low differential pressure, medium differential pressure, high differential pressure, and large differential pressure.
.1 When stopping the gauge for back-blow inspection, the _________ valve should be closed first, followed by the _________ valve. Answer: Once. 2. Differential pressure transmitters, classified by the differential pressure they measure, generally fall into five categories: ______ differential pressure, ______ differential pressure, ______ differential pressure, ______ differential pressure, and ______ differential pressure. Answer: Micro Low Medium High Large
Answer: 1. Once, reverse blowing 2. Low, medium, high, large
Once: reverse airflow – low, medium, high, large
1. One reverse blow 2. Low, Medium, High, Large
1. When stopping the meter for inspection of the backflow instrument, the main valve should be closed first, followed by the backflow branch valve. 2. Differential pressure transmitters can be classified into five categories based on the differential pressure they measure: micro-differential pressure, low differential pressure, medium differential pressure, high differential pressure, and large differential pressure.