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plumber a person who installs and repairs the pipes and fittings of water supply, sanitation, or heating systems.

Features:

-User-Friendly User Interface

-always updating questionnaires

-can adjust question item

-Provided explanation of answers

-Show result for every completed exam

-Have a different subject

-Multiple-choice exams

-have a color when right and wrong

-dynamic question and choices

The best preparation for any exam because this reviewer covers a lot of subjects.

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