1. 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.
2. 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.
3. 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.
4. 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.
5. 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
6. 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.
7. 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.
8. 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.
9. 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.
10. In advanced machining processes, what is the full form of CHM?
a) Chemical machining
b) Chemical manufacturing
c) Chemical milling
d) None of the mentioned
Explanation: In advanced machining processes, full form of CHM is Chemical milling.