34) Spot-facing is done to

Deburr the mouth of the drilled hole

Make surface flat so that bolt head can take proper seat on the surface

Give fine finish to the drilled hole

Enlarge the existing hole

Answer is:

Make surface flat so that bolt head can take proper seat on the surface

Explanation:

Spot facing is a machining operation for producing a flat seat for bolt head, washer or nut at the opening of a drilled hole. The tool is called a spot facer or a spot facing tool. Spot facing is similar to counter-boring, except that it is shallower. Tools that are used for counter-boring can be used for spot facing as well.

Cutting MCQ with Answers

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35) For tapping with M5 tap, Which size drill will you use ?

4.5 mm

4.0 mm

3.8 mm

3.5 mm

Answer is:

4.0 mm

36) A slight convexity is made on the cutting edges of flat chisel for

Cutting sharp corners

Allowing lubricant to reach the cutting edge

Cutting curved surfaces

Preventing digging of the ends of cutting edge

Answer is:

Preventing digging of the ends of cutting edge

37) The point angle of twist drill depends upon the

Cutting speed

Type of drilling machine

Size of the drill

Material to be drilled

Answer is:

Material to be drilled

Explanation:

The point angle of a general purpose (standard) drill is 118°. This is the angle between the cutting edges (lips). The angle varies according to the hardness of the material to be drilled.