1.
1. The MIG/MAG welding process is known in the US as:
2.
2. In MIG/MAG welding, the wire electrode serves as:
3.
3. The weld pool in MIG/MAG welding is protected by:
4.
4. The contact tip in MIG/MAG welding:
5.
5. Which type of equipment offers full automatic control with no manual intervention?
6.
6. Semi-automatic MIG/MAG welding requires manual control of:
7.
7. Mechanised MIG/MAG welding allows manual adjustment of:
8.
8. Continuous wire feed provides:
9.
9. An advantage of MIG/MAG welding is:
10.
10. A disadvantage of MIG/MAG welding is:
11.
11. Which primary variable affects welding current?
12.
12. Increasing wire feed speed:
13.
13. Wire diameters commonly used in MIG/MAG are:
14.
14. Voltage in spray transfer primarily controls:
15.
15. Voltage in dip transfer affects:
16.
16. For non-ferrous metals, shielding gas should be:
17.
17. MAG welding is mainly used for:
18.
18. Pure CO2 as shielding gas:
19.
19. Argon + 5-20% CO2 mixture provides:
20.
20. Argon + 1-5% CO2 is widely used for:
21.
21. Helium in gas mixtures increases:
22.
22. Contact tip to work distance (CTWD) affects:
23.
23. Increasing CTWD results in:
24.
24. Recommended nozzle to work distance (typical):
25.
25. Shielding gas nozzle purpose is to:
26.
26. Dip transfer is characterised by:
27.
27. Spray transfer requires:
28.
28. Pulsed transfer is beneficial for:
29.
29. Globular transfer is:
30.
30. Synergic welding helps by:
31.
31. Inductance in dip transfer:
32.
32. Recommended wire feed roll pressure:
33.
33. Correct liner type for aluminum wire:
34.
34. Contact tip wear affects:
36.
35. Voltage drop in connections affects:
37.
36. Welding imperfections include:
39.
38. Self-shielded FCAW:
40.
39. Wire types for FCAW include:
41.
40. Baking of cored wires:
42.
41. MIG basic equipment includes:
43.
42. MIG torch head assembly includes:
44.
43. Inspection of electrode wire should check:
45.
44. Inductance adjustment affects:
46.
45. Weld pool overheating can cause:
47.
46. Wire feed speed is related to:
48.
47. Nozzle diameter should increase with:
49.
48. Dip transfer typically uses:
50.
49. Spray transfer is suitable for:
51.
50. Pulsed transfer frequency is typically:
52.
51. Increasing wire feed speed in MIG/MAG welding will:
53.
52. Standard wire diameters in MIG/MAG welding include:
55.
53. In spray transfer, voltage primarily controls:
56.
54. In dip transfer, increasing voltage affects:
57.
55. Loose welding connections can cause:
58.
56. Non-ferrous metals require which shielding gas?
59.
57. Helium addition to argon in MIG welding:
60.
58. Active gases used for steel welding include:
61.
59. 100% CO2 as a shielding gas:
62.
60. Argon-5–20% CO2 mixtures provide:
63.
61. Argon + 1–5% CO2 is commonly used for:
64.
62. Austenitic stainless steels typically use:
65.
63. Maximum CO2 content for austenitic steels is:
66.
64. Light alloys require which type of gas?
67.
65. Argon-helium mixtures improve:
68.
66. In MIG welding aluminium, less than 80% argon:
69.
67. Increasing travel speed of the torch:
70.
68. Torch angle affects:
71.
69. Increasing CTWD (contact tip to work distance) causes:
72.
70. Short CTWD risks:
73.
71. Recommended CTWD for dip transfer:
74.
72. Recommended CTWD for spray transfer:
75.
73. Nozzle to work distance affects:
76.
74. Typical nozzle-to-work distance:
77.
75. Purpose of the shielding gas nozzle:
78.
76. Larger nozzle diameters are used for:
79.
77. Dip transfer metal characteristics:
80.
78. Spray transfer requires:
81.
79. Pulsed transfer advantages include:
82.
80. Pulse welding extends spray transfer operation:
83.
81. Globular transfer is characterized by:
84.
82. Synergic control in MIG/MAG welding:
85.
83. Advantages of synergic curves include:
86.
84. Inductance in dip transfer:
87.
85. Too low inductance causes:
88.
86. Too high inductance results in:
89.
87. Modern electronic power sources:
90.
88. Required MIG/MAG equipment includes:
91.
89. Drive rollers in MIG/MAG welding:
92.
90. Steel wire liners are:
93.
91. Teflon liners are:
94.
92. Contact tips should be:
96.
93. Voltage settings in MIG/MAG control:
97.
94. Gas flow rate inspection ensures:
98.
95. Safety checks include:
99.
96. Welding imperfections include:
100.
97. Silica inclusions occur in:
101.
98. Porosity is caused by:
102.
99. Burn-through occurs due to:
103.
100. Self-shielded FCAW wires:
104.
101. Which factor primarily affects arc length stability in MIG/MAG welding?
105.
102. Increasing arc voltage in spray transfer results in:
106.
103. The globular transfer mode is most associated with:
107.
104. In globular transfer, droplet size is:
108.
105. A synergic MIG/MAG system automatically:
109.
106. The main advantage of synergic control is:
110.
107. Inductance in MIG/MAG welding primarily influences:
111.
108. Higher inductance settings result in:
112.
109. A constant voltage (CV) power source is typically used for:
113.
110. Which component feeds wire in MIG/MAG welding?
114.
111. A liner inside the welding torch:
115.
112. Contact tips in MIG/MAG torches
116.
113. Poor wire feeding is often caused by:
117.
114. A gas nozzle is used to
118.
115. Excessive gas flow rate causes
119.
116. Typical shielding gas flow rate for MIG/MAG welding is:
120.
117. A gas pre-flow function ensures:
121.
118. A gas post-flow function prevents:
122.
119. During inspection, excessive spatter often indicates:
123.
120. Porosity in weld metal is usually caused by:
124.
121. Lack of fusion is often due to:
125.
122. Overlap occurs when:
126.
123. A major safety hazard with COâ‚‚ cylinders is:
127.
124. Before welding, hoses and connections must be checked for:
128.
125. Flux-cored arc welding (FCAW) differs from MIG/MAG because:
129.
126. Self-shielded FCAW wires:
130.
127. Gas-shielded FCAW wires:
131.
128. FCAW advantages over MIG/MAG include:
132.
130. FCAW is widely used in:
133.
131. Which transfer mode is best for overhead welding?
134.
132. Short-circuiting mode allows welding of:
135.
133. Spray transfer is preferred for:
136.
134. Pulsed MIG/MAG helps by:
137.
135. In synergic MIG, increasing wire feed speed automatically adjusts:
138.
136. Inductance is mainly relevant in:
139.
137. High inductance results in
140.
138. MIG torches are typically cooled by:
141.
139. Water-cooled torches are used for
142.
140. A wire spool brake prevents:
143.
141. Spatter adhesion can be reduced by:
144.
142. Poor penetration usually results from:
145.
143. To reduce porosity, welder should:
146.
144. The key inspection tool for weld profile is:
147.
145. Arc stability can be checked by:
148.
146. Stick-out in MIG welding refers to:
149.
147. Excessive stick-out causes:
150.
148. Duty cycle of a power source indicates:
151.
149. A 60% duty cycle at 400 A means:
152.
150. The main advantage of MIG/MAG over stick welding is:
153.
151. In MIG/MAG welding, pulsed spray transfer is useful for:
154.
152. Pulsed MIG reduces:
155.
153. Which shielding gas is best for carbon steel MIG welding?
156.
154. Pure COâ‚‚ shielding gas results in:
157.
155. For aluminium MIG welding, the recommended gas is:
158.
156. Spray transfer requires:
159.
157. Short-circuiting transfer is most suitable for:
160.
158. Globular transfer causes:
161.
159. The typical wire feed speed range for short-circuiting transfer is:
162.
160. High wire feed speed in short-circuiting mode can cause:
163.
161. MIG/MAG welding polarity is usually:
164.
162. Electrode positive in MIG/MAG results in:
165.
163. Wire diameter affects:
166.
164. Typical carbon steel wire diameters for MIG/MAG:
167.
165. Stick-out should be:
168.
166. Excessive stick-out causes:
169.
167. Push technique in MIG/MAG welding:
170.
168. Pull technique:
171.
169. Advantages of push technique include:
172.
170. Torch angle for fillet welds is typically:
173.
171. MIG/MAG welding wire stick-out affects:
174.
172. Proper travel speed ensures:
175.
173. Travel speed too fast results in:
176.
174. Travel speed too slow results in:
177.
175. MIG/MAG welding root passes are best done in:
178.
176. Weaving techniques improve:
179.
177. Overlap occurs when:
180.
178. Undercut is caused by:
181.
179. Fillet weld throat thickness is:
182.
180. Reinforcement should not exceed:
183.
181. In multi-pass welds, interpass temperature should be:
184.
182. Preheating is required to:
185.
183. Post-weld heat treatment (PWHT) helps:
186.
184. Residual stress in welds can cause:
187.
185. Distortion control is achieved by:
188.
186. Clamping helps:
189.
187. Proper weld sequence reduces:
191.
188. Use of run-on and run-off tabs prevents:
192.
189. Crater fill is necessary to:
193.
190. Welding defects can be identified by:
195.
191. Visual inspection detects:
196.
192. Radiographic testing identifies:
197.
193. Ultrasonic testing uses:
198.
194. Magnetic particle inspection is suitable for:
199.
195. Dye penetrant testing is for:
200.
196. Proper gas flow and nozzle maintenance reduce:
201.
197. Operator skill affects:
202.
198. Welding documentation is important for:
203.
199. WPS (Welding Procedure Specification) provides:
204.
200. Qualification of welders (WPQ) ensures:
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