What does the water company take in the exam for recruiting laboratory technicians?

When water companies recruit laboratory technicians, they should test some basic professional knowledge, such as laboratory knowledge and safety production knowledge. Sometimes when you take an English test, it is generally level 3.

A chemical experiment conducted by a chemist to determine whether one or more components of a substance (such as minerals, alloys, drugs, antibiotics or food) exist or, more importantly, to determine the content of these components.

Chemists should master common glass instruments and other utensils and supplies, balances, measuring units and common physical and chemical data, physical and chemical characteristics, standards, detection standards, standard substances and standard samples, sampling rules and sample decomposition, chemical analysis methods, separation and enrichment, errors, data processing and common calculation formulas, instrument analysis methods and laboratory safety knowledge. This manual can be used and referenced by factories, laboratories and related technicians and chemists.