In the butt type of weld joint, the plates to be joined are __________________
orthogonal to each other
inclined to each other
overleaped
in the same plane
In laser welding, weld quality depends on __________
rate of travel
rate of deposition
heat input
all of these
In Thermit type of welding, __________ type of energy is used.
mechanical
chemical
ultra-sonic
photon
In laser welding, with increase in power, the heat affected zone _________
increases
decreases
remains same
none of these
A __________ mode of welding provides a deep, narrow profile of weld-bead with an aspect ratio greater than 1.5.
keyhole
conduction
toe
quasi
The laser welding has the characteristic(s) of ______________
a) welding dissimilar materials with different properties
b) not capable of welding inaccessible areas
c) small heat affected zone
only c)
b) and c)
a) and c)
a), b) and c)
By increasing the laser scan speed the __________
widths of upper and lower parts of weld bead increase
widths of upper and lower parts of weld bead decrease
width of upper part of weld bead decreases while width of lower part of weld bead increases
width of upper part of weld bead increases while width of lower part of weld bead decreases
Among the following, _________ defect(s) occur(s) in laser weld bead.
porosity
toe crack
inclusion of slag
all of these
High-speed electron kinetic energy is utilized in ______ welding process
ultrasound
electron beam
laser
none of the above
The optical penetration depth in laser welding is determined by ____________
a) absorptivity, transmissivity, and reflectivity of the material
b) wavelength of the laser light
c) yield strength of the material
only a)
a) and b)
a) and c)
a), b) and c)