# Advanced Machining Questions and Answers – MAF – Process parameters and MRR

This set of Advanced Machining Processes Interview Questions and Answers for freshers focuses on “MAF – Process parameters and MRR”.

1. What is the limit of the roller speed used in MAF?
a) Up to 0.5 m/s
b) Up to 1.3 m/s
c) Up to 2.6 m/s
d) Up to 3.3 m/s

Explanation: Roller speed used can be up to 1.3 m/s.

2. What is the value of magnetic field intensity used in MAF?
a) 0 – 0.53 Tesla
b) 0.6 – 0.70 Tesla
c) 0.70 – 0.90 Tesla
d) 0.90 – 1.1 Tesla

Explanation: Value of the magnetic field intensity used in MAF range between 0 – 0.53 Tesla.

3. What is the value of magnetic pressure used in Magnetic abrasive machining?
a) 0 – 30 kPa
b) 50 – 100 kPa
c) 100 – 200 kPa
d) 200 – 500 kPa

Explanation: In Magnetic abrasive finishing, value of magnetic pressure ranges between 0 – 30 kPa.

4. What is the value of frequency used in Magnetic abrasive finishing process?
a) 1 – 10 Hz
b) 12 – 25 Hz
c) 30 – 50 Hz
d) 60 – 100 Hz

Explanation: In MAF process, value of the frequencies used range between 12 – 25 Hz.

5. In which direction, oscillatory motion of magnets are carried out?
a) Axial to work piece
b) Perpendicular to work piece
c) Inclined to work piece
d) None of the mentioned

Explanation: Axial oscillation motion of magnets takes with respect to work piece.

6. Which of the following surface defects are removed using Magnetic abrasive finishing?
a) Scratches
b) Hard spots
c) Lay lines and tool marks
d) All of the mentioned

Explanation: All the surface defects mentioned above, can be removed using Magnetic abrasive finishing.

7. What is the value of the limited depth to which form errors, tapers, looping can be corrected?
a) 10 microns
b) 20 microns
c) 30 microns
d) 40 microns

Explanation: Form errors, tapers, looping etc.., can be corrected up to a limited depth of 20 microns.

8. State whether the following statement is true or false about magnetic abrasive finishing.
“Increasing the magnetic flux density raises the rate of material removal in finishing.”
a) True
b) False

Explanation: In MAF, as the magnetic flux density increases, material removal rate increases.

9. Which of the following factors, does material removal rate depend on?
a) Magnetic flux density
b) Working clearance
c) Work piece material
d) All of the mentioned

Explanation: All the factors mentioned above, are responsible for change in material removal rate.

10. Which of the following factors does not affect the magnetic abrasive conglomerates in MAF?
a) Abrasive type
b) Abrasive size
c) Work piece material
d) Volume fraction

Explanation: In Magnetic abrasive finishing, work piece material has no effect on magnetic abrasive conglomerates.

11. State whether the following statement is true or false about Magnetic abrasive finishing.
“Higher rates of material removal are obtained, with an increase in amplitude and frequency.”
a) True
b) False

Explanation: As the amplitude and frequency increases, the rate of material removal increases.

Sanfoundry Global Education & Learning Series – Advanced Machining.

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