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Manufacturing Engineering Ii
Manufacturing Technology Multiple Choice
Quiz 1
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Q.1
The difference between welding at long and short wavelengths is due to _____
a) high absorptivity
b) high reflectivity
c) polarisation
d) shroud design
Q.2
The pressure at the centre is a function of the _____
a) surface tension
b) joint geometries
c) material composition
d) gap tolerance
Q.3
The gap between the components should be smaller than _____
a) half of the beam diameter
b) beam diameter
c) square of the beam diameter
d) one quarter of the beam diameter
Q.4
For welds having larger gaps,_____
a) the beam is rotated
b) an extra lens is added
c) high energy density beam is used
d) zif-zag welds are made
Q.5
The welds which do not require filler material are called _____ materials.
a) autogenous
b) autofiller
c) non-filler
d) isotropic
Q.6
Which of the following is not affected by the gas shroud?
a) Formation of plasma
b) Hindrance to the beam
c) Absorption of the beam
d) Pool width
Q.7
The shroud gas enters the keyhole because of _____
a) the fast emission of vapour from the keyhole
b) the narrower shape of the keyhole
c) higher wavelength of the beam
d) molten material
Q.8
Which of the following gases is most favourable as shrouding gases in laser welding?
a) Oxygen
b) Helium
c) Argon
d) Chlorine
Q.9
How many issues are there concerning laser welding?
a) 2
b) 3
c) 4
d) 5
Q.10
In case of laser welding of dissimilar metals, there are chances of formation of _____
a) porous welds
b) brittle welds
c) thin welds
d) cracks
Q.11
Cracking happens due to _____
a) shrinkage stress
b) improper gas shielding
c) high weld speeds
d) high wavelength
Q.12
The temperature required for using arc augmented welding phenomenon is around _____
a) 100 °C
b) 200 °C
c) 300 °C
d) 400 °C
Q.13
Arc Augmented Laser Welding is used for _____
a) higher penetration
b) reducing power loss
c) stabilizing the arc
d) improve wed quality
Q.14
The arc is on the same side of the workpiece as the laser.
a) True
b) False
Q.15
Weld pool geometry can be controlled by using multiple laser beams.
a) True
b) False
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