Welding Multiple Choice Questions (MCQ). Objective Questions and Answers on Welding. MCQ on welding.
1- Select the right combination of gases which, when combusted provides the required heat in a Gas welding process.
(A) Oxygen and Carbon dioxide
(B) Nitrogen and Argon
(C) Oxygen and Acetylene
(D) Benzene and Carbon dioxide
2- Choose the welding type that does NOT fall under the category of Resistance Welding.
(A) Flash butt welding
(B) Thermit Welding
(C) Projection Welding
(D) Seam welding
3- Which of the following energy is used to provide the heat that is essential in an Arc welding?
(A) Electrical Energy
(B) Potential Energy
(C) Thermal Energy
(D) Elastic Energy
4- During which process, the cast iron welding can be fixed?
(A) By foundry
(B) By sticking the electrodes
(C) By preheating cast iron
(D) When poured into mould
5- A material’s weldability is utilized to decide ____ .
(A) the structure of welding material with different materials
(B) the last weld quality with different materials
(C) Hydrogen and cold cracking with different weld materials
(D) quantity and purpose with different weld materials
6- The molten weld can be protected from atmospheric contamination by the process of “Submerging”. What do the fusible flux in submerging process consists of?
(A) Lime, manganese oxide, calcium fluoride, magnesium
(B) Lime, silica, manganese oxide, calcium fluoride
(C) Lime, silica, manganese oxide, aluminium fluoride
(D) Lime, silica, carbon monoxide, calcium fluoride
7- Which welding produces blend of faying surfaces when heated to shape the weld by the electrical check of the material ?
(A) Spot and shot welding
(B) Spot and seam welding
(C) Shot and seam welding
(D) Tungsten and shot welding
8- How is argon gas produced in the atmosphere?
(A) In the gas-discharge tubes
(B) During chemical reaction in supernova
(C) During chemical reaction in atmosphere
(D) During nucleosynthesis in supernova
9- What do edge preparation means?
(A) Laminating two metals
(B) Removing material along edges of metal surfaces
(C) Adding material along edges of metal surfaces
(D) Sandwich the fillers and the metals
10- What are the standard materials used in TIG filler rods as per AWS and ASME codes?
(A) Aluminium, Pure tungsten, Thoriated tungsten
(B) Carbon steel, Thoriated tungsten, Zirconiated tungsten
(C) Carbon steel, Stainless steel, Aluminium
(D) Pure tungsten, Thoriated tungsten, Zirconiated tungsten
11- The amount of power a machine can produce in a given time, is known as.
(A) Duty cycle
(B) Constant current
(C) Output current
(D) Power cycle
12- Which GTAW torches are used in welding, when the welding process is to be carried over long time?
(A) Surface-cooled
(B) Water-cooled
(C) Machine-cooled
(D) Air-cooled
ANSWERS:
1-(C), 2-(B), 3-(A), 4-(A), 5-(B), 6-(B), 7-(B), 8-(D), 9-(A), 10-(C), 11-(A), 12-(B)