Unconventional Machine Process Set 26 MCQs

Q1 | Which of the following materials combine to form the magnetic abrasive brush in MAF?

work piece

magnetic and abrasive particles

magnets

all of the mentioned

Q2 | In order to achieve uniform circulation of abrasives, the magnetic abrasives are undergone through which of the following?

stirring

oscillation

vibration

all of the mentioned

Q3 | Magnetic lines of force flows on which part of the work piece material?

through the work piece

over the surface

above the work piece

below the work piece

Q4 | What is the limit of the roller speed used in MAF?

up to 0.5 m/s

up to 1.3 m/s

up to 2.6 m/s

up to 3.3 m/s

Q5 | In which direction, oscillatory motion of magnets are carried out?

axial to work piece

perpendicular to work piece

inclined to work piece

none of the mentioned

Q6 | Which of the following surface defects are removed using Magnetic abrasive finishing?

scratches

hard spots

lay lines and tool marks

all of the mentioned

Q7 | What is the value of the limited depth to which form errors, tapers, looping can be corrected?

10 microns

20 microns

30 microns

40 microns

Q8 | 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.”

true

false

Q9 | Which of the following factors, does material removal rate depend on?

magnetic flux density

working clearance

work piece material

all of the mentioned

Q10 | Which of the following factors does not affect the magnetic abrasive conglomerates in MAF?

abrasive type

abrasive size

work piece material

volume fraction

Q11 | 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.”

true

false

Q12 | Which of the following applications where MAF is used?

finishing of inner surfaces

polishing of balls and rollers

chamfering and deburring of gears

all of the mentioned

Q13 | Diamond abrasives used for finishing operation results in which type of surface defects?

deep pits

surface scratches

micro cracks

all of the mentioned

Q14 | Which of the following conditions is/are not suitable for finishing of ceramic balls?

controlled force

large abrasive sizes

small abrasive sizes

less harder abrasives

Q15 | In MAF, ceramic balls and the bearing rollers are placed in between which components?

abrasives and float

drive shaft and float

float and magnets

magnets and abrasives

Q16 | Polishing in Magnetic abrasive finishing is done, by which action of material removal?

mechanical abrasion

mechanical erosion

chemical corrosion

material vaporization

Q17 | For obtaining a better finish using Magnetic abrasive finishing, tubes are rotated at which speeds?

very low

low

medium

very high

Q18 | Which of the following is an advantage of MAF over Electrolytic finishing?

disposing of electrolyte

cost effective

more flexible

more accuracy

Q19 | State whether the following statement is true or false about Magnetic abrasive finishing. “Mirror finishing, removed burrs with lowering the accuracy of the shape are achieved by MAF.”

true

false

Q20 | What are the other applications where Magnetic abrasive finishing can be used?

removal of oxide layers

removal of protective coatings

chamfering

all of the mentioned