Hacksaw blade teeth gets dull due to

24) Which one of the following is NOT the reason for making file faces slightly convex in form ?

To increase the friction between the file face and the job surface.

To give better distortion of the pressure and to compensate slight filing movement.

To reduce the friction between the file face and the job surface.

To reduce the effort in driving a file.

Answer is:

To increase the friction between the file face and the job surface.

Explanation:

25) A drilled hole goes out of centre due to

Improper clamping of workpiece

Workpiece having blowholes

Centre punch mark not being large enough to give proper seat to the chisel edge of drill

Any of the above

Answer is:

Any of the above

Explanation:

A drilled hole goes out of centre due to
Improper clamping of workpiece
Workpiece having blowholes
Centre punch mark not being large enough to give proper seat to the chisel edge of drill

26) Which one of the following designations does NOT denote the grade of a file ?

Answer is:

First cut

Explanation:

The grade of file tool is listed below
1. Rough
2. Bastard
3. Second Cut
4. Smooth
5. Dead Smooth

1) Rough File : A rough file is used for removing rapidly a larger quantity of metal. It is mostly used for trimming the rough edges of soft metal castings.

2) Bastard File: A bastard file is used in cases where there is a heavy reduction of material.

3) Second Cut File: A second cut file is used to give a good finish on metals. It is excellent to file hard metals. It is useful for bringing the jobs close to the finishing size.

4) Somooth File: A smooth file is used to remove small quantity of material and to give a good finish.

5) Dead Smooth File: A dead smooth file is used to bring the material to accurate size with a high degree of finish.

27) The cutting angle of a flat chisel for chipping aluminium is

Answer is:

35 Degree

Explanation:

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Hacksaw blade teeth gets dull due to

Any one of the above

For More Cutting Tools MCQ - Machinist(Set-1) with Answers

Related Cutting Tools MCQ - Machinist(Set-1) with Answers

24) Which one of the following is NOT the reason for making file faces slightly convex in form ?

To increase the friction between the file face and the job surface.

25) A drilled hole goes out of centre due to

Any of the above

26) Which one of the following designations does NOT denote the grade of a file ?

First cut

27) The cutting angle of a flat chisel for chipping aluminium is

35 Degree

For More Cutting Tools MCQ - Machinist(Set-1) with Answers