14-36.
You should use water-cooled GTA
welding torches when welding with
current above what prescribed
amperage?
1.
50 amp
2.
100 amp
3.
150 amp
4.
200 amp
14-37.
What is the most popular gas used
in the GTA welding process?
1.
Radon
2.
Argon
3.
Helium
4.
Nitrogen
14-38.
To strike the arc using an ac GTA
welding machine, you should angle
the end of the torch toward the
work so that the electrode is at
what prescribed distance above the
plate?
1.
1/8 in.
2.
1/4 in.
3.
3/8 in.
4.
1/2 in.
14-39.
In the GMA welding process, what
factor determines the melting rate
of the filler wire?
1.
The speed rate of the welder
2.
The diameter of the filler
wire
3.
The level of the welding
current
4.
The size of the area to be
welded
14-40.
When you are GMA welding with a
constant-voltage power source,
what condition will occur as a
result of any changes in the
length of the welding arc?
1.
The shielding gases will
automatically shut off
2.
The welding current will
automatically change
3.
The wire driven mechanism will
automatically adjust the feed
speed
4.
The welding gun will
automatically stop delivering
the electrode until the
problem has been resolved
14-41.
In the GMA welding process, what
type of shielding gas is preferred
for welding thick materials?
1.
Neon
2.
Argon
3.
Helium
4.
Hydrogen
14-42.
In the GMA welding process, what
basic welding position is
preferred for most joints because
it improves the molten metal flow,
bead contour, and gives better gas
protection?
Flat
Vertical
Overhead
Horizontal
14-43.
For safety purposes, when welding
cables must reach some distance
from the machine, you should run
the cables overhead, if possible.
1.
True
2.
False
14-44.
What term refers to metals with
iron bases?
Nonferrous
Ferrous
Ironic
Alloy
14-45.
The heat-treatment cycle includes
all EXCEPT which of the following
events?
1.
Soaking
2.
Heating
3.
Cooling
4.
Misting
14-46.
When steel parts have an uneven
cross section, what factor
determines the soaking period?
Its total weight
Its lightest section
Its heaviest section
Its overall length and width
IN ANSWERING QUESTIONS 14-47 THROUGH
14-49, SELECT FROM COLUMN B THE HEAT-
TREATMENT PROCESS THAT MATCHES ITS USE
LISTED IN COLUMN A.
NOT ALL ITEMS LISTED
IN COLUMN B WILL BE USED.
A.
USE
B.
PROCESS
14-47.
To relieve the
1.
Normalizing
strains induced
during hardening 2.
Annealing
14-48.
To reduce
3.
Tempering
residual stresses
or induce
4.
Case
softness
hardening
14-49.
For parts that require a wear-
resistant surface
77
