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Manufacturing Engineering Ii
Manufacturing Processes Assessment
Quiz 1
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Q.1
In electron beam gun, vacuum is achieved by _____
a) reciprocating pump
b) rotary pump only
c) combination of rotary pump and diffusion pump
d) combination of diffusion pump and vane pump
Q.2
Diffusion pump is an _____
a) oil filter equipment
b) oil heater
c) oil cooler
d) oil collector
Q.3
The oil coming out of diffusion pump is evacuated by a _____
a) screw pump
b) gear pump
c) rotary pump
d) piston pump
Q.4
High velocity gets of oil vapour coming out of diffusion pump entrain ______ present within the gun.
a) water droplets
b) oil droplets
c) air molecules
d) hazardous gas molecules
Q.5
Which of the following parameters do not affect the electron beam machining process?
a) Accelerating voltage
b) Lens current
c) Spot size
d) Workpiece material
Q.6
For the electron beam machining process, pulse duration for the electron beam is in range of_____
a) 10 μs to 90 μs
b) 50 μs to 15 ms
c) 80 μs to 10 ms
d) 15 ms to 1 s
Q.7
Beam current is in the range of _____
a) 50 μamp to 0.8 amp
b) 100 μamp to 10 amp
c) 200 μamp to 1 amp
d) 185 μamp to 1.5 amp
Q.8
Increasing the beam current directly increases the _____
a) energy per pulse
b) accelerating voltage
c) spot size
d) lens current
Q.9
In electron beam machining process, the energy density is controlled by spot size.
a) True
b) False
Q.10
At higher energy densities, material removal rate is high.
a) True
b) False
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