Question

_____________________ are the bits used for drilling ceramic tiles and glass with a ground tungsten carbide tip.

(a) Flat wood bits

(b) Countersink bits

(c) Tile bits

(d) Carbide insert bits

I had been asked this question in an interview.

Question is from Drilling and Road Making Equipments topic in portion Construction Equipments of Construction & Building Materials

Answer 1

Correct choice is (c) Tile bits

The best explanation: Tile bits can be used with the hand drill, but are best used in a variable speed power drill on slow speed. When drilling glass, some form of lubricants like turpentine or white spirit should be used to keep the tip cool. Ceramic tiles can be drilled using a masonry bit if it is used at a slow speed.