Drilling and Reaming MCQ - Machinist(Set-1) with Answers

Drilling and Reaming MCQ - Machinist(Set-1) with Answers

6) The drill sleeves or sockets are available with Morse taper and their number range MT-1 to MT-6. Which one of the following drill sizes refers to MT-4 ?

Answer is:

Drills above 31.75 mm up to 50.50 mm

Explanation:

For Morse Taper MT-4 the range starts from 31.7 mm and till 50.50 mm (Approx).

The drill sleeves or sockets are available with Morse taper and their number range MT-1 to MT-6. Which one of the following drill sizes refers to MT-4 ?

7) A drilled hole goes out of centre due to

Answer is:

Any of the above

A drilled hole goes out of centre due to

8) Which one of the following coolants is used for reaming aluminium workpiece ?

Answer is:

Kerosene

Explanation:

Kerosene is used as coolants when reaming aluminium work-piece.

9) A Dia 6H7 hole is to be reamed in a steel workpiece. What size of drill will be required ?

Answer is:

5.8 mm

10) The point angle of twist drill depends upon the

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.