1. In a _______ welding process the electrode is non-consumable.
(A) GTAW
(B) SMAW
(C) MIG
(D) GMAW
2. The percentage of thorium present in thoriated tungsten electrode used inTIG welding is
(A) 0.5 to 1%
(B) 1 to 2.0%
(C) 2.5 to 3%
(D) 3 to 3.5%
3. Argon is supplied in ______ coloured cylinders.
(A) Brown
(B) Black
(C) Blue
(D) Red
4. The function of high frequency unit is in TIG welding
(A) start the Arc
(B) increase in Arc Voltage
(C) increase in Voltage
(D) to keep the current constant
5. The maximum temperature in TIG welding is
(A) 6700 °C
(B) 6500 °C
(C) 6000 °C
(D) 4000 °C
6. Which one of the following metal has the highest melting temperature ?
(A) Tungsten
(B) Copper
(C) Mild Steel
(D) Aluminium
