Welding Objective Type Questions with Answers
1- In welding operation, flux reacts with metallic oxides to produce
(A) Metal oxide
(B) Gas fumes
(C) Foam
(D) Slag
2- The color of hose pipe used for acetylene gas is
(A) Orange
(B) Blue
(C) Black
(D) Red
3- In welding, flux in used as to
(A) Cool the job
(B) Binding agent
(C) Preheat job material
(D) Dissolve and remove the metal oxides
4- Porosity in welding can be avoided by
(A) Cleaning the work piece surface of all oil, grease and paint
(B) Ensuring that electrode coating is free from dampness
(C) By drying electrodes in an oven before use
(D) All of the above
5- Joining two pieces by placing them between two electrodes and passing a heavy current through them for a very short duration is called
(A) Lap welding
(B) Seam welding
(C) Butt welding
(D) Spot welding
6-Electric resistance welding process is a ___ welding process.
(A) Laser
(B) Diffusion
(C) Pressure
(D) Fusion
7- The process for joining two similar or dissimilar metals by fusion is
(A) Welding
(B) Soldering
(C) Brazing
(D) None of the above
8- Welding two pieces of metal together, end to end, is called ___ welding.
(A) Spot
(B) Butt
(C) Seam
(D) Lap
9- In gas welding, standard color for oxygen hose pipe is
(A) Red
(B) Green
(C) blue
(D) black
10- An example of non-consumable electrode is
(A) Stainless steel
(B) Mild steel
(C) Pure tungsten
(D) All of the above
11- The shielding gas generally used in Tungsten Inert Gas (TIG) welding, is
(A) Ethane gas
(B) Acetylene gas
(C) Argon gas
(D) Oxygen gas
12- Following type of welding is popular in Automobile industry
(A) Tungsten Inert Gas (TIG) welding
(B) Metal arc welding
(C) Gas welding
(D) Resistance welding
13- In Electron Beam Welding (EBW), the source for a stream of electron is
(A) Cathode tube
(B) Tungsten
(C) Electrode
(D) Hot filament of tungsten
14- Main application of Submerged Arc welding is in
(A) Joining rails
(B) Automobile industry
(C) Ship building
(D) Fabrication work
15- Which is the most active solder flux?
(A) Mild fluxes
(B) Organic fluxes
(C) Rosin fluxes
(D) Inorganic fluxes
16- The main application of thermit welding is in
(A) Ship building
(B) Aircraft welding
(C) Underwater welding
(D) Rail welding
17- An example for brazing filler material is
(A) Carbide
(B) Mild steel
(C) Stainless steel
(D) Copper
18- An example for flux is
(A) Argon
(B) Borax
(C) Graphite
(D) Carbon
19- Excessive heat input in welding operation will cause
(A) Crack through
(B) Weld fusion
(C) Weld porosity
(D) Burn through
20- An example of radiant energy welding process is
(A) Tungsten Inert Gas (TIG) welding
(B) Gas welding
(C) Electron beam welding
(D) Arc welding
ANSWERS:
1-(D), 2-(D), 3-(D), 4-(D), 5-(D), 6-(D), 7-(A), 8-(B), 9-(D), 10-(C), 11-(C), 12-(D), 13-(A), 14-(D), 15-(C), 16-(D), 17-(D), 18-(B), 19-(D), 20-(C)