A. Electrical energy
B. Chemical energy
C. Energy of high velocity electrons
D. Heat generated by friction
Related Mcqs:
- Thermit welding is categorised as the ______________________ welding ?
A. Forge
B. Fusion
C. Resistance
D. Arc - Projection welding & stud welding is categorised as the _______________ welding?
A. Pressure
B. Thermit
C. Resistance
D. Arc - Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of_________________?
A. Lumps
B. Pellets
C. Briquettes
D. Sinter - Which of the following mainly decides the current to be employed is arc welding ?
A. Electrode size
B. Plate thickness
C. Voltage across the arc
D. Welded portion length - Current employed in resistance welding ranges from ____________________ kVA/cm2?
A. 1.2 to 2.5
B. 4.5 to 6.2
C. 7.5 to 8.5
D. 10.5 to 15.5 - Oxyacetylene reducing flame is used while carrying out welding on___________________?
A. Alloy steel
B. Grey cast iron
C. Mild steel
D. High carbon steel - Elimination of brittleness resulting from welding of saw blades is done by __________________ of the welded portion ?
A. Annealing
B. Toughening
C. Work hardening
D. Tempering - Coating provided on the electrodes used in the arc welding is not expected to_________________?
A. Add alloying elements
B. Prevent electrode from contamination
C. Stabilise the arc
D. Provide protective atmosphere to weld - Oxyacetylene reducing flame is used while carrying out welding on__________________?
A. Alloy steel
B. Grey cast iron
C. Mild steel
D. High carbon steel - Consumable electrodes are used in the ____________________ welding?
A. Gas
B. Arc
C. Thermit
D. Resistance
