Advanced Manufacturing Processes Question Bank

 Subject: Advanced Manufacturing Processes

Question Bank

Syllabus: (2022)

UNIT: 1 Introduction to Non-traditional Machining

UNIT: 2 Non-traditional Machining Processes

UNIT: 3 Jigs and Fixtures

UNIT: 4 CNC Machine Tools

UNIT: 5 CNC Part Programming

UNIT: 6 Flexible Manufacturing System (FMS)

 

Part 1: Short Answer type questions

Unit 1 & 2: Non-Traditional Machining

2023 

1. In electrochemical machining (ECM) removal of metal from the work piece takes place –

(a) Anodic dissolution, (b) Abrasive action, (c) Thermal melting, (d) Erosion

Ans: (a) Anodic dissolution

2. Which of the following process comes under mechanical machining?

(a) USM (b) EDM (b) LBM (d) PAM.

Ans: (a) USM

3. Taper of hole produced in EDM process is caused by –

a) Inaccuracy of electric size

(b) The side sparks between the tool and the machined surface produced

(c) Larger flow of current between the bottom of the electrode and the work piece surface

(d) None of the above,

Ans: (b) The side sparks between the tool and the machined surface produced

4. Copper wire is used in – (a) EDM (b) ECM (c) Wire EDM (d) LBM

Ans: (c) Wire EDM

5. In EBM ____ energy is used to remove the material.

(a) Thermochemical (b) Chemical (c) Thermal (d) AII of these.

Ans: (c) Thermal

6. Laser is a –

(a) Monochromatic beam of light

(b) Deflected beam of light

(c) Reflected turbulent beam of light

(d) general ray of light.

Ans: (a) Monochromatic beam of light

vii) The process is suitable for machining brittle materials such as glass – (a) EDM (b) ECM (c) USM (d) LBM

Ans: (c) USM

viii) The electrode wires of wire cut EDM are usually made form – (a) graphite (b) iron (c) nickel (d) brass

Ans: (d) brass

2022

9. Non-Traditional machining is recommended when we need which of the following features? a) Complex shapes, b) High surface quality, c) Low-rigidity structures, d) All of the mentioned.

Ans: d) All of the mentioned

10. Non-Traditional machining can also be called as – a) Contact Machining, b) non-contact machining, c) Partial contact machining, d) Half contact machining.

Ans: b) non-contact machining

11. In which of the following industries, Non-traditional machining methods play an important role? a) Automobile, b) Aerospace, c) Medical, d) All of the mentioned.

Ans: d) All of the mentioned

12. Different classifications of Non-traditional machining based on source of energy are – a) Mechanical, b) Thermal, c) Chemical and electro-chemical, d) All of the mentioned.

Ans: d) All of the mentioned

13. In mechanical machining, material is removed by – a) Erosion, b) Corrosion, c) Abrasion, d) Vaporization.

Ans: a) Erosion

14. Material in thermal machining is removed by which of the following means? a) Vaporization, b) Melting, c) Electro-plating, d) All of the mentioned.

Ans: d) All of the mentioned

15. Which of the following process comes under mechanical machining? a) USM, b) EDM, c) LBM, d) PAM.

Ans: a) USM

16. Surface defects that may be occurred during thermal machining are – a) Micro cracking, b) Heat affected zones, c) Striations, d) All of the mentioned.

Ans: d) All of the mentioned

UNIT: 3 Jigs and Fixtures

1. In manufacturing by machining, jigs and fixtures are justifiably used for – (a) Piece production b) batch production c) Large lot production (d) Mass production.

Ans: b) batch production

2. For locating an external cylindrical surface which of the following types of ‘locator’ is used – (a) V-block (b) Round locator (c) Round locator with a hole whose diameter corresponds to the diameter of the cylindrical surface to be located (d) Conical locator

Ans: – (a) V-block

3. With the use of Jigs and fixture – a) Labour cost decreases b) Labour cost increases c) Labour cost decreases d) None of the mentioned

Ans: c) Labour cost decreases

4. In which of the following operation jigs are preferred over fixture?

(a) Drilling (b) Turning (c) Milling (d) Grinding.

Ans: (a) Drilling

5. A solid body may have maximum (a) 2 degrees of freedom (b) 4 degrees of freedom (c) 6 degrees of freedom (d) 12 degrees of freedom.

Ans: (d) 12 degrees of freedom

UNIT 4 &5:  CNC Machine Tools

 

1. CNC Milling is sometimes called as – (a) Turning center (b) Machining Center (c) None of these (d) AII of these.

Ans: (b) Machining Center

2. CNC lathe is sometimes called as – (a) Turning center (b) Machining Center (c) None of these (d) All of these.

Ans: (a) Turning center

3. "G" Codes stand for - (a) Miscellaneous Function (b) Preparatory Function (c) Linear Function (d) Bi-nomial Function in CNC part program.

Ans: (b) Preparatory Function

4. "M" Codes stand for – (a) Miscellaneous Function (b) Preparatory Function(c) Linear Function (d) Bi-nomial Function in CNC part program.

Ans: (a) Miscellaneous Function

xix) "N010" is stands for-(a) Line no. 01 (b) Line no.10 (c) Line no 100 (d) Line no.1000 in CNC part program.

Ans: (b) Line no.10

5. Modern CNC is given – (a) open loop control system (b) closed loop control system (c) flexible control system (d) non-flexible control system.

Ans: (b) closed loop control system

6. Feed drives in CNC milling machines are provided by – (a) Synchronous motors (b) Induction motors (c) Stepper motors (d) Servo-motors.

Ans: (d) Servo-motors

UNIT: 6 Flexible Manufacturing System (FMS)

 

1. Bins are used as – (a) transportation (b) Moving(c) storage (d) heating device in FMS.

Ans:

2. Every FMS system has a definite Entry and Exit – (a) True (b) False (c) Partially True (d) Partially false.

Ans:

3. Which is not a property of FMS (Flexible manufacturing system)? (a) High accuracy (b) Less production cost (c) Less initial cost (d) Flexibility in production.

Ans:

4. Volume of work produced in FMS environment is determined from – (a) Number of machines used in

FMS (b) Kind of material handling equipment used in FMS (c) Kind of layout used in FMS (d) All are

correct.

Ans:

Part 2: Long Answer type questions

Unit 1 & 2: Non-Traditional Machining

 

1. State the differences between traditional and non-traditional machining. 4 (2023)

2. Describe the LBM process with a neat sketch. 4 (2023)

3. Explain working principle of EDM with neat sketch. 5 (2023)

4. What are the advantages and disadvantages of EBM process. 3 (2023)

5. Write down FOUR advantages of NTM over TM. 2 (2022)

6. Write down FOUR disadvantages or limitations of NTM over TM. 2 (2022)

7. Write down FOUR advantages of EDM. 2 (2022)

8. Write down FOUR disadvantages EDM. 2 (2022)

9. Write down FOUR advantages of ECM. 2 (2022)

10. Write down FOUR disadvantages LBM. 2 (2022)

11. Draw schematic diagram of WEDM and mark it accordingly. 7 (2022)

12. Write down Disadvantages of EDM. 3 (2022)

13. Draw schematic diagram of USM and Mark it accordingly. 7 (2022)

14. What arc the application areas of Non-Traditional Machining processes? 3 (2022)

15. What is Spontaneous radiation? 3 (2022)

16. How Stimulated radiation is occurred? 4 (2022)

17. Why LASER is called Stimulated Emission of Radiation? 3 (2022)

 

Unit 2: Jigs and Fixtures

 

1. What is the function of jig? 1 (2023)

2. Compare between Jig and Fixture. 5 (2023)

3. Give an example of Jig and fixture. 2 (2023)

4. Write in brief about the degrees of freedom of a body. 3 (2023)

5. Write 3-2-1 principle of location with a neat sketch. 5 (2023)

3. Discuss with neat sketch 3-2-1 Principle of Location. 10 (2022)

4. Write down Five different types of Locking devices used in Jigs and Fixtures. 10 (2022)

5. Write down FOUR differences between jigs and fixtures. 2 (2022)

 

UNIT: 4 &5: CNC Machine Tools and Part Programming

 

1. a) Write the basic components of CNC machine tools. 4 (2023)

b) What is absolute co-ordinate system and incremental co-ordinate system? 4 (2023)

2. Write down the significance of the following G codes G00, G01, G90, G91, G94, G95, M02, M03, M05 and M06. 1x8 (2023)

3. a) Write in brief and with a proper sketch about open loop control system in CNC. 2 (2023)

b) Write meaning of the lathe program line: N020 G90 51000 F0.5; N030 X20 220; 6 (2023)

4. Write down FOUR disadvantages NC. 2 (2022)

5. What is the application of Tool Magazine? 2 (2022)

6. Why we use stepper motor in CNC system? 2 (2022)

7. Draw a neat sketch of Re-circulating Ball Screw used in CNC. 5 (2022)

8. Short Note: Automatic Tool Changer. 5 (2022)

 

Unit 4: FMS

 

1. Briefly discuss about FMS layout configurations. 4 (2023)

2. What are the advantages and disadvantages of FMS system? 4 (2023)

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