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Manufacturing Engineering Ii
Manufacturing Science Multiple Choice
Quiz 1
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Q.1
AJM nozzles are made from which of the following materials?
a) Low carbon steel
b) HSS
c) WC
d) Stainless steel
Q.2
Material removal in AJM of glass is around_____
a) 0.1 mm3/min
b) 15 mm3/min
c) 15 mm3/s
d) 1500 mm3/min
Q.3
Material removal takes place in AJM due to _____
a) electrochemical action
b) mechanical impact
c) fatigue failure of the material
d) sparking on impact
Q.4
As the stand-off distance increases, the depth of penetration in AJM _____
a) increases
b) decreases
c) does not change
d) initially increases and then remains steady
Q.5
If air is used as a carrier gas, the pressure of the air is maintained at around_____
a) 1 bar
b) 3 bar
c) 5 bar
d) 3.5 bar
Q.6
The mass flow rate of abrasive entering the chamber is independent of the amplitude of vibration of the sieve (in the mixing chamber).
a) True
b) False
Q.7
In AJMM, impingement angle is kept approximately in range of_____
a) 100 ~ 200
b) 300 ~ 450
c) 600 ~ 900
d) 500 ~ 600
Q.8
Which of the following is used as abrasive in AJMM?
a) Al2O3
b) HNO3
c) FeC
d) CaCO3
Q.9
Which of the following assumption is true about AJMM?
a) Abrasives are irregular in shape.
b) The abrasive particles are characterised by the mean grit diameter
c) Brittle materials are considered to fail due to fatigue
d) The kinetic energy of the abrasives is partially lost in overcoming the friction in the nozzle
Q.10
By AJMM, holes of intricate shapes can be drilled easily.
a) True
b) False
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