Electrical Wiring System MCQ with Answers

24) Which is the correct size of drill for making pilot holes for 6 mm diameter screw shank?

Answer is:

4 mm

Electrical Wiring System MCQ with Answers

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Related Electrical Wiring System MCQ with Answers

25) What is the depth of pilot hole for fixing wood screw in soft wood?

Answer is:

Equal to 1/2 screw length

Electrical Wiring System MCQ with Answers

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