31
In drilling aluminium, a drill with
A)
Zero helix angle is used
B)
Low helix angle is used
C)
High helix angle is used
D)
Any helix angle can be used
Answer & Solution
Answer: Option
C
A)
For holding and guiding the tool in drilling, reaming or tapping operations
B)
For holding the work in milling, grinding, planing or turning operations
C)
To check the accuracy of workpiece
D)
None of the above
Answer & Solution
Answer: Option
A
33
The common welding error that occurs due to shrinkage of weld metal, faulty clamping of parts, faulty penetration or overheating at joints is called?
A)
Distortion
B)
Warping
C)
Porous weld
D)
Poor fusion
Answer & Solution
Answer: Option
B
34
A drill considered as a cutting tool having zero rake, is known as a
A)
Flat drill
B)
Straight fluted drill
C)
Parallel shank twist drill
D)
Tapered shank twist drill
Answer & Solution
Answer: Option
B
35
A lathe with four steps on the cone pulley and with back-gears will have
A)
Four direct speeds
B)
Four indirect speeds
C)
Four direct and four indirect speeds
D)
Eight indirect speeds
Answer & Solution
Answer: Option
C
36
The process of removing metal by a cutter which is rotated against the direction of travel of workpiece, is called
A)
Up milling
B)
Down milling
C)
Face milling
D)
End milling
Answer & Solution
Answer: Option
A
37
The process of removing metal by a cutter which is rotated in the same direction of travel of workpiece, is called
A)
Up milling
B)
Down milling
C)
Face milling
D)
End milling
Answer & Solution
Answer: Option
B
38
Which of the following statement is correct for orthogonal cutting system?
A)
The cutting edge of the tool is perpendicular to the direction of tool travel
B)
The cutting edge clears the width of the workpiece on either ends
C)
The chip flows over the tool face and the direction of the chip flow velocity is normal to the cutting edge
D)
All of the above
Answer & Solution
Answer: Option
D
39
In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called
A)
Friction zone
B)
Work-tool contact zone
C)
Shear zone
D)
None of these
Answer & Solution
Answer: Option
A
40
The hardness of a grinding wheel is specified by
A)
Brinell hardness number
B)
Rockwell hardness number
C)
Vickers pyramid number
D)
Letter of alphabet
Answer & Solution
Answer: Option
D
