Advanced Machining Questions and Answers – PCM-Applications and Advantages

This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “PCM-Applications and Advantages”.

1. Which of the following are the metals that can be machined using Photo chemical milling?
a) Aluminium
b) Copper
c) Nickel
d) All of the mentioned
View Answer

Answer: d
Explanation: Copper, aluminium, zinc, steel, molybdenum, zirconium, titanium are some of the metals that can be machined using PCM.

2. Which of the following non-metallic materials that can be machined using PCM?
a) Glass
b) Ceramics
c) Some plastics
d) All of the mentioned
View Answer

Answer: d
Explanation: The non-metallic materials mentioned above, can be machined using PCM.

3. Which of the following materials are excellent for Photochemical milling?
a) Brittle materials
b) Ductile materials
c) Elastic materials
d) None of the mentioned
View Answer

Answer: a
Explanation: Brittle materials are excellent candidates for PCM, since they tend to break easily using traditional machining processes.
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4. State whether the following statement is true or false about applications of PCM.
“Using PCM, very high tempered materials are machined easily.”
a) True
b) False
View Answer

Answer: a
Explanation: PCM can be favourable for very high tempered and brittle materials unlike that of traditional machining, where they tend to break easily.

5. Which of the following are the typical applications of Photo chemical milling?
a) Production of signs
b) Production of labels
c) Fabrication of boxes and enclosures
d) All of the mentioned
View Answer

Answer: d
Explanation: Using PCM, the above mentioned applications can be fulfilled.

6. What is the value of thickness of work pieces to be used in PCM?
a) 0.001 – 0.003 mm
b) 0.013 – 1.50 mm
c) 1.50 – 2.35 mm
d) 2.50 – 3.33 mm
View Answer

Answer: b
Explanation: The thickness value of work pieces in PCM range between 0.013 – 1.50 mm.

7. What type of work pieces must be used in Photochemical milling process?
a) Bent surfaces
b) Rolled surfaces
c) Flat surfaces
d) None of the mentioned
View Answer

Answer: c
Explanation: The work pieces must be flat in order to carry on the PCM process.
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8. Which of the following industries use PCM for different applications?
a) Electronic
b) Automotive
c) Telecommunication
d) All of the mentioned
View Answer

Answer: d
Explanation: PCM has its applications in the industries such as electronics, automotive, telecommunication, computer, medical, aerospace and other industries.

9. Which of the following are the components that can be machined using PCM?
a) Filters and screens
b) Lead frames
c) Connectors and probes
d) All of the mentioned
View Answer

Answer: d
Explanation: Typical components such as gaskets, lead frames, contacts, connectors, probes, filters and screens can be machined using PCM.
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10. What is the cost per unit for low production volumes of complex designs using PCM?
a) Low
b) Medium
c) High
d) None of the mentioned
View Answer

Answer: a
Explanation: Relatively low cost per unit is required in PCM, since tooling is inexpensive compared to that of traditional practices.

11. State whether the following statement is true or false regarding advantages of PCM.
“In PCM, lead times are large, when compared to that required for hard tooling using traditional means.”
a) True
b) False
View Answer

Answer: b
Explanation: Lead times are small when compared to that required by processes that require hard tooling.

12. Which of the following factors can change the parameters of etch such as depth, size of hole etc.?
a) Time of etch
b) Type of etchant
c) All of the mentioned
d) None of the mentioned
View Answer

Answer: c
Explanation: Type of etchant used and time for etching can change the features such as hole size and depth of etch.

13. How much amount of burr is produced, when components are machined using PCM?
a) Small
b) Medium
c) Large
d) No burr
View Answer

Answer: d
Explanation: Photochemical milling is a burr-free process i.e.., burr is not produced in this process.

14. Which of the following properties of materials are changed by using Photochemical milling?
a) Hardness of material
b) Ductility of material
c) Grain structure
d) None of the mentioned
View Answer

Answer: d
Explanation: In PCM, material properties such as hardness, ductility and grain structure are not changed.

15. State whether the following statement is true or false regarding advantages of PCM.
“Patterns can be reproduced easily.”
a) True
b) False
View Answer

Answer: a
Explanation: Patterns can be reproduced easily because tooling is made by photographic techniques.

Sanfoundry Global Education & Learning Series – Advanced Machining.

To practice all areas of Advanced Machining, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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