14-23.
The oxygen pressure is much higher
14-24.
14-25.
14-26.
14-27.
14-28.
than the acetylene pressure in
what type of oxyacetylene welding
torch?
1.
The jet type
2.
The injector type
3.
The high-pressure type
4.
The equal-pressure type
On oxyacetylene welding equipment,
what color and thread type
identifies the (a) oxygen hose and
(b) acetylene hose?
1.
(a) Green with right-handed
threads
(b) red with left-handed
threads
2.
(a) Green with left-handed
threads
(b) red with right-handed
threads
3.
(a) Black with right-handed
threads
(b) green with left-handed
threads
4.
(a) Red with left-handed
threads
(b) black with right-handed
threads
What type of flame should you use
when welding bronze with an
oxyacetylene welding rig?
1.
Neutral
2.
Oxidizing
3.
Nitrating
4.
Carburizing
If you light the acetylene only on
an oxyacetylene welding torch, the
flame will be what color?
1.
Red
2.
Blue
3.
Yellow
4.
Orange
A torch flashback can be caused by
all EXCEPT which of the following
factors?
1.
Loose connections
2.
Improper pressures
3.
Overheating of the torch
4.
Touching the tip of the torch
against the work
When torch welding, you should
hold the white cone of the flame
at what prescribed distance from
the surface of the metal?
1.
1/8 in.
2.
1/4 in.
3.
3/8 in.
4.
1/2 in.
14-29.
What welding method should you use
when welding material more than
1/8 inch thick?
1.
Puddle
2.
Ripple
3.
Backhand
4.
Forehand
IN ANSWERING QUESTIONS 14-30 THROUGH
14-33, SELECT FROM COLUMN B THE BASIC WELD
JOINT THAT MATCHES ITS DESCRIPTION IN
COLUMN A.
A.
DESCRIPTION
B.
WELD JOINT
14-30.
14-31.
14-32.
14-33.
Made by joining
1.
Tee
two members
located
2.
Edge
approximately at
right angles to
3.
Butt
each other
4.
Corner
Made by welding
two or more
parallel members
Made by welding two plates whose
surfaces are 90° of each other at
the joint
Made by joining two pieces of
material-edge to edge without any
overlapping
14-34.
In the GTA welding process, the
shielding gas is used for which of
the following purposes?
1.
To reflect the heat from the
electrode
2.
To produce a more concentrated
heat to the weld zone
3.
To lay the weld bead faster
and lengthen the weld arc
4.
To protect the molten weld
metal from atmospheric
contamination
14-35.
In the GTA welding process, the
greatest concentration of heat at
the electrode results from what
arrangement of (a) current and (b)
polarity?
1.
(a) dc (b) reverse
2.
(a) dc (b) straight
3.
(a) ac (b) reverse
4.
(a) ac (b) straight
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