1.
TIG welding is also called:
2.
In TIG welding, the electrode is:
3.
The purpose of inert shielding gas in TIG welding is to:
4.
Tungsten is used because it has a melting point of approximately:
5.
Main TIG welding process variables include:
6.
Low welding current in TIG can cause:
7.
High welding current in TIG can result in:
8.
. Best TIG welding results are usually obtained with:
9.
AC or DC+ve polarity is preferred for:
10.
DC+ve polarity concentrates heat:
11.
DC-ve polarity distributes heat:
12.
AC polarity distributes heat:
13.
TIG welding penetration increases when:
14.
TIG electrode extension (stickout) should generally be:
15.
Too short electrode extension can cause:
16.
. Too long electrode extension can result in:
17.
Typical TIG shielding gases include:
18.
Adding ~5% hydrogen to argon is used for:
19.
. Helium shielding gas is advantageous for:
20.
Argon shielding gas is preferred for:
21.
Typical TIG shielding gas flow rate is approximately:
22.
Too low shielding gas flow can cause:
23.
Too high shielding gas flow can cause:
24.
Back purging in TIG welding is done to:
25.
. Typical back purge gas is:
26.
For plate welding back purge may require:
27.
Electrode tip shapes for DC-ve TIG welding are usually:
28.
Electrode tip shape for AC TIG welding is:
30.
Pure or zirconiated tungsten electrodes are mainly used for:
31.
Filler wires in TIG welding:
32.
Tungsten inclusions occur due to:
33.
Modern TIG power sources use current slope-up to:
34.
Crater cracking is avoided using:
35.
TIG welding common applications include:
36.
TIG is particularly suitable for:
37.
Advantages of TIG welding include:
38.
Disadvantages of TIG welding include:
39.
TIG welding produces welds with:
40.
Welding reactive metals with stable oxides such as aluminium requires:
41.
TIG welding can be performed:
42.
Electrode grinding dust from thoriated tungsten is:
43.
Ceriated and lanthaniated electrodes:
44.
Zirconiated electrodes:
45.
Increasing travel speed in TIG welding:
46.
Reducing travel speed in TIG welding:
47.
TIG welding is particularly used in:
48.
AC TIG welding is used to weld:
49.
Electrode tip angle for DC TIG should be:
50.
AC electrode tip is typically:
51.
Shielding gas lighter than air requiring more flow is:
52.
Shielding gas heavier than air and more draught resistant is:
53.
In TIG, small tungsten fragments in weld are:
54.
Filler metal additions in TIG welding are used to:
55.
. TIG welding is less economical than MMA/MIG for:
56.
TIG welding requires:
57.
Pure tungsten electrodes are preferred for:
58.
Thoriated electrodes are:
59.
Ceriated electrodes can be used with
60.
Zirconiated electrodes are resistant to:
61.
Small tungsten inclusions occur primarily due to:
62.
Current slope-up in TIG welding helps to:
63.
Current slope-out in TIG welding is used to:
64.
Crater cracking occurs due to:
65.
Autogenous TIG welding refers to:
66.
For stainless steel pipes, TIG welding is often used:
67.
TIG welding in aerospace is used for:
68.
Advantages of TIG welding include:
69.
TIG welding is particularly useful for:
70.
Disadvantages of TIG welding include:
71.
In TIG welding, the filler metal is:
72.
High welding current in TIG can result in:
73.
Low welding current in TIG may cause:
74.
Electrode extension is measured from:
75.
Tungsten electrode tip length for DC welding is usually:
76.
Electrode tip for AC welding is:
77.
Travel speed in TIG welding affects:
78.
Increasing travel speed in TIG welding:
79.
Reducing travel speed in TIG welding:
80.
Helium shielding gas is best for:
81.
Argon shielding gas is preferred for:
82.
Shielding gas flow too low results in:
83.
Shielding gas flow too high causes:
84.
Back purging is critical for:
85.
Typical back purge gas is:
86.
Back purge flow rate should be reduced prior to welding to:
87.
Filler wires in TIG welding
88.
Thermal shock in tungsten can lead to:
89.
Crater cracking is a form of:
90.
Modern TIG power sources have slope-up devices to:
91.
. Slope-out devices in TIG welding are used to:
92.
Electrode type for AC welding of aluminium is usually:
93.
Electrode type for DC-ve welding is usually:
94.
TIG welding is suitable for:
95.
Advantages of TIG welding include:
96.
TIG welding is particularly used in industries requiring:
97.
Disadvantages of TIG welding include:
98.
Tungsten electrode dust hazard is primarily from:
99.
TIG welding filler metal additions are used to:
100.
TIG welding filler metal additions are used to:
101.
Electrode diameter and tip grinding affect:
102.
Overall, TIG welding is most suited for:
103.
One disadvantage of TIG welding is:
104.
TIG welding requires:
105.
TIG welding is less economical than MMA or MIG/MAG for:
106.
TIG welding may be unsuitable for:
107.
A common issue in TIG welding if the electrode contacts the weld pool is:
108.
TIG welding has low tolerance for:
109.
The shielding of the weld zone in draughty conditions is:
110.
Compared with MIG/MAG or MMA, TIG welding:
111.
The risk of tungsten inclusions occurs when:
112.
. A limitation of TIG welding is:
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