Multiple Choice Questions (MCQ) on Tungsten Inert Gas (TIG) Welding
1- Tungsten Inert Gas (TIG) welding is also known as
(A) GTAW
(B) SMAW
(C) GMAW
(D) MIG
2- Tungsten Inert Gas (TIG) welding, is ___ process that uses ___ tungsten electrode to produce the weld.
(A) a gas welding, non-consumable
(B) an arc welding, non-consumable
(C) a gas welding, consumable
(D) an arc welding, consumable
3- Which of the following shielding gas is used in Tungsten Inert Gas (TIG) welding?
(A) argon
(B) helium
(C) argon or helium
(D) hydrogen
4- Tungsten Inert Gas (TIG) welding is most commonly used to weld thin sections of
(A) aluminium
(B) magnesium
(C) copper alloys
(D) all of the above
5- In TIG welding, the electrode and the workpiece are separated about ___ apart.
(A) 0.1–1.5 mm
(B) 1.5–3.0 mm
(C) 3.0–4.5 mm
(D) 4.5–6.0 mm
6- TIG welding produces
(A) x-rays
(B) gamma radiations
(C) ultra violet radiations
(D) all of the above
7- TIG welding in used in
(A) aerospace industry
(B) bicycle industry
(C) tools and dies repair
(D) all of the above
8- If the welding torch is too far from the workpiece
(A) the shielding gas becomes ineffective, causing porosity within the weld
(B) It results in a weld with pinholes
(C) then weld will be weaker
(D) all of the above
9- If the amount of current used exceeds the capability of the electrode
(A) excessive penetration and spatter increases
(B) tungsten inclusion in the weld may result
(C) both (A) and (B)
(D) none of the above
10- Air cooling systems are most often used for current operations upto
(A) 200 Amperes
(B) 300 Amperes
(C) 400 Amperes
(D) 500 Amperes
11- Following power is used while welding steels, nickel, titanium and other metals.
(A) Direct current with a negatively charged electrode
(B) Alternating current with a negatively charged electrode
(C) Direct current with a positively charged electrode
(D) Alternating current with a positively charged electrode
12- Shielding gases in GTAW are used to protect the welding area from defect(s) like
(A) fusion defects
(B) porosity
(C) weld metal embrittlement
(D) all of the above
ANSWERS:
1-(A), 2-(B), 3-(C), 4-(D), 5-(B), 6-(C), 7-(D), 8-(D), 9-(B), 10-(A), 11-(A), 12-(D)