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______________________ are used for cutting large, fixed diameter holes in a wood or plastic.

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______________________ are used for cutting large, fixed diameter holes in a wood or plastic.

(a) Carbide insert bits

(b) Wood auger bits

(c) Hole saw bits

(d) Wooden bits

I had been asked this question by my school principal while I was bunking the class.

The doubt is from Drilling and Road Making Equipments in portion Construction Equipments of Construction & Building Materials

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Correct choice is (c) Hole saw bits

Easiest explanation: Hope saw bits usually cut up to a depth of 18 mm. They are best used in a power drill at low speed. Their sharpening can be done with a fine triangular file. To cut large hole combination holes of bits with the number of different size round saw blades are used.

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