Test # 45
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760 questions in 76 tests. Each test contains 10 questions.
Idiom of the Day
let (someone) know (about something)
to tell or inform someone about something
"Let me know when you are ready to go to the movie."
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Making Use Of a Residual Current Device
The residual current device often abbreviated as RCD is a very important tool to enhance safety when using electrical equipment. It reduces the potential risk of being electrocuted. Do not use an RCD to reduce the risk of explosion in an explosive atmosphere.