Electric Welding MCQ PDF

81. The danger of electric shock is maximum

(a) before welding.
(b) during arcing.
(c) while inserting electrode into the holder.
(d) after welding.

82. The eyes of welding operator must be protected against

(a) infrared radiations.
(b) ultraviolet radiations.
(c) both (a) and (b).
(d) solar radiations.

83. Which of the following automatic welding processes is likely to give maximum rate of metal deposition ?

(a) Multiple power submerged arc.
(b) Gas shielded bare wire.
(c) Single wire submerged arc.
(d) Continuous flux covered electrode.

85. In a welded joint poor fusion is on account of

(a) improper current.
(b) high welding speed.
(c) uncleaned metal surface.
(d) lack of flux.

86. Which of the following uses consumable electrodes?

(a) TIG.
(b) MIG.
(c) laser.
(d) None of the above.

87. In which of the following welding methods the molten metal is poured for joining the metals?

(a) Gas welding.
(b) Thermit welding.
(c) TIG welding.
(d) Arc welding.

88. The porosity of weld joint may be caused by

(a) poor base metal.
(b) incorrect size of electrode.
(c) low welding current.
(d) any of the above.

89. In welding, weld spatter defect is generally because of too……..during welding.

(a) high voltage
(b) high current
(c) low voltage
(d) low current

90. High temperature metals, such as columbium can be easily welded by

(a) MIG welding.
(b) TIG welding.
(c) electron beam welding.
(d) flash butt welding.

91. ………welding is used for welding of car body.

(a) Gas
(b) Spot
(c) Carbon-arc
(d) Atomic hydrogen

92. Grey iron is usually welded by

(a) gas welding.
(b) resistance welding.
(c) TIG welding.
(d) arc welding.

93. The method recommended for the welding of aluminum alloy is…………welding.

(a) dc arc
(b) ac arc
(c) acetylene-oxygen gas
(d) tungsten arc

94. Steel pipes are manufactured by

(a) arc welding.
(b) argon arc welding.
(c) resistance welding.
(d) thermit welding.

95. Steel rails are welded by

(a) thermit welding.
(c) gas welding.
(b) argon arc welding.
(d) resistance welding.

96. Aluminum is difficult to weld as

(a) it has an oxide coating.
(b) it conducts away heat very rapidly.
(c) both (a) and (b).
(d) none of the above.

97. Electronic components are joined by

(a) spot welding.
(b) soldering.
(c) brazing.
(d) none of the above.

98. Aircraft body is

(a) riveted.
(b) seam welded.
(c) gas welded.
(d) spot welded.

99. A seamless pipe has

(a) arc welded joint.
(b) spot welded joint.
(c) no joint.
(d) either (a) or (b).

100. The method usually not preferred for welding of chromium molybdenum steel is

(a) thermit welding.
(b) resistance welding.
(c) submerged arc welding.
(d) oxyacetelyne gas welding.

• Electrical Heating MCQ
• Electric Welding MCQ
• Electric Illumination MCQ
• Download this MCQ in PDF

©yourelectricalguide.com/ electric welding mcq pdf.