Machine Tools and Machining Interview Questions and Answers on “Lathe : Tool Material’s Types”
1. Which of the following tool material is not suitable for small diameters?
a) carbon steel
b) carbides
c) carbon and carbides both
d) none of the mentioned
Answer: b
Clarification: Carbides are not suitable for small diameters as these carbides has higher speeds and generally used in rapid stock removal.
2. Which of the following cutting material cannot be forged to shape easily?
a) carbides
b) ceramic
c) stellites
d) none of the mentioned
Answer: c
Clarification: Stellites cannot be forged to shape easily because they are very brittle in nature.
3. Which of the following is not the disadvantage of diamonds?
a) incompressible
b) readily conducts heat
c) rigid machine are required
d) all of the mentioned
Answer: c
Clarification: For ceramics, we need rigid machines. The other two mentioned disadvantages are true for diamond.
4. High speed steel has an excessive wear on______
a) castings
b) hard materials
c) casting and hard materials both
d) none of the mentioned
Answer: c
Clarification: It has excessive wear on casting and hard materials and that’s why can only perform slow and medium cutting speeds.
5. Which of the following has poor shock resistant?
a) carbides
b) diamonds
c) ceramics
d) none of the mentioned
Answer: c
Clarification: Ceramic has poor shock resistant. Apart from this, it has high wear resistance and again has very high stock removal rate.
6. In which tool material, rigid machines are required?
a) ceramics
b) carbon steel
c) diamonds
d) all of the mentioned
Answer: a
Clarification: Ceramics are used for this purpose. They are not suitable for intermittent cut and even for small diameters.
7. Machine tools must be tough enough to withstand_____
a) shock
b) vibration
c) both shock and vibration
d) none of the mentioned
Answer: c
Clarification: Machine tools must be tough enough to withstand these both in order to provide stability against downward pressure and to perform the job more accurately.
8. Carbides are used in_____
a) rapid stock removal
b) higher speeds
c) rapid stock removal and higher speed both
d) none of the mentioned
Answer: c
Clarification: Carbides are used for these both reasons. But they are not used for comparatively small jobs.
9. “Light finishing cuts in expensive forming tools”- this quality is applicable to_____
a) carbides
b) ceramics
c) stellites
d) none of the mentioned
Answer: d
Clarification: The answer should be none of mentioned. This is the quality of carbon steel.
10. Which of the following is easy to grind and generally used for intermittent cut?
a) carbides
b) diamond
c) high speed steel
d) none of the mentioned
Answer: c
Clarification: High speed steel has some advanced quality and so it is very accurate even on small diameters. So it is easy to grind high speed steel. Again, this high speed steel is generally used for intermittent cut.
Machine Tools and Machining for Interviews,