Plasma Beam Machining
PBM is the only process
which works faster in ____ steel than _____ steel.
a) Stainless, mild b) Mild, stainless c) Remains same all d) All of the mentioned
View Answer
Answer: a
Explanation: PBM is the only
fabrication process which works faster in stainless steels compared to mild
steels.
What is the temperature
reached by cathode in order to produce plasma beam?
a) 12000 ºC b) 18000 ºC c)
28000 ºC d) 40000 ºC
View Answer
Answer: c
Explanation: The temperature
reached by cathode to produce plasma arc is about 28000 ºC in Plasma Beam
Machining.
What is the value of
velocity of plasma jet in Plasma beam machining?
a) 100 m/sec b) 300 m/sec c)
400 m/sec d) 500 m/sec
View Answer
Answer: d
Explanation: The value of
the velocity of the plasma jet in Plasma beam machining is about 500 m/sec.
What is the maximum value of
the thickness used in PBM process?
a) 100 mm b) 200 mm c)
300 mm d) 400 mm
View Answer
Answer: b
Explanation: The maximum
value of the thickness used in the Plasma beam machining process is about 200
mm.
Which of the following are
the different shielded plasmas used in PBM?
a) Gas-shielded plasma b) Water-shielded plasma c) All of the mentioned
d) None of the mentioned
View Answer
Answer: c
Explanation: Both
gas-shielded plasma and water shielded plasma are used in Plasma beam machining
process.
Material removal rates
depend on which of the following factors?
a) Work piece material b) Type of cutting c) Shielding gases d) All of the mentioned
View Answer
Answer: d
Explanation: Material
removal rates in PBM depend on work piece material, type of cutting and the
shielding gas.
A low power factors
indicates _____ energy required and _____ removal rates.
a) Low, low b) Low, high c) High, low d) High, high
View Answer
Answer: b
Explanation: A low power
factor in Plasma beam machining indicates low energy required and high material
removal rates.
What happens to the
machining speed if the thickness of material is increased in PBM?
a) Decreases b) Increases c)
Enhanced d) Remains same
View Answer
Answer: a
Explanation: Machining speed
in Plasma beam machining reduces with an increase in the thickness of the work
piece material.
