Tool Life Quiz | Tool Life Multiple Choice Questions and Answers

Questions
1 The ascending order of evolution of materials used for making the cutting tools is
A stone – bronze – iron – steel
B bronze – stone – steel – iron
C iron – steel – bronze – stone
D bronze – stone – steel – iron

Answer: stone – bronze – iron – steel
2 Which of the following is second hardest substance known?
A Diamond
B Cubic Boron Nitride (CBN)
C Cermets
D Ceramics

Answer: Cubic Boron Nitride (CBN)
3 In blanking operation, the clearance is provided on.......
A Punch
B May br provided on any member
C Half on die and half on punch
D None of the above

Answer: Punch
4 In piercing operation,the clearence is provided on......
A Half on die and half on punch
B Punch
C Die
D none of the mentioned

Answer: Die
5 In bending operation, the metal takes shape of.........
A Could take any shape
B Die
C Punch
D None of the above

Answer: Punch
6 In drawing operation, increase of die radius.......
A Punch load depends on other factors
B Has much influnce on punch load and it decreases
C Does not influnce the punch load much
D Punch load increases

Answer: Has much influnce on punch load and it decreases
7 In drawing operation, increase of punch radius.......
A Punch load depends on other factors
B Punch load increases
C Does not influnce the punch load much
D None of the above

Answer: Does not influnce the punch load much
8 The front rake required to machine brass by H.S.S. tool is.......
A 0o
B 5o
C 10o
D None of the above

Answer: 0o
9 Which of the following tools are generally manufactured by Powder metallurgy?
A Cemented carbides
B High carbon steel
C Abrasives
D Low carbon steel

Answer: Cemented carbides
10 Which of the following is hardest known material?
A Diamond
B Cubic boron nitride (CBN)
C Ceramics
D Cemented carbide

Answer: Diamond
11 Corrundum is a/an
A Abrasive
B Ceramic
C Diamond
D None of the above

Answer: Abrasive
12 The cutting tool wears due to
A Flank wear
B Crater wear
C Edge wear
D All of the above

Answer: All of the above
13 The built up edge in cutting tools can be eliminated by
A High pressure cutting fluid
B Higher rake angles
C Fast cutting speed
D All of the above

Answer: All of the above
14 The cutting speed of High speed steels is ___ times faster than Carbon steel
A 4
B 8
C 6
D None of the above

Answer: 4
15 Which of the following cutting tool has highest hot hardness?
A Carbon tool steel
B Cast alloys
C Ceramics
D High speed steels

Answer: Ceramics
16 Which of the following cutting conditions greatly affects the tool wear?
A Depth of cut
B Feed
C Cutting speed
D None of the above is correct.

Answer: Cutting speed
17 In a single point turning operation with a cemented carbide and steel combination having a Taylor exponent of 0.25, if the cutting speed is halved, then the tool life will become
A Eight times
B Sixteen times
C Half
D Two times

Answer: Sixteen times
18 A drill bit of 20mm diameter rotating at 500 rpm with a feed rate of 0.2 mm/revolution is used to drill a through hole in Mild Steel plate of 20mm thickness. The depth of cut in this drilling operation is
A 10 mm
B 0.2 mm
C 100 mm
D 20 mm

Answer: 10 mm
19 The tool life increases with the
A Decrease in back rake angle
B Increase in side cutting edge angle
C Decrease in side rake angle
D Decrease in nose radius

Answer: Increase in side cutting edge angle
20 In the Taylor’s tool life equation, VT^n = C, the value of n=0.5. The tool life has a life of 180 minutes at a cutting speed of 18 m/min. If the tool life is reduced to 45 minutes, then the cutting speed will be
A 36 m/min
B 72 m/min
C 18 m/min
D 9 m/min

Answer: 36 m/min
apsc cce prelims 2025