WELDING MCQ 2
WELDING MCQ 2
1) If the blowpipe is moved to and fro frequently while cutting the kerf will
be less
of correct size
not be affected
be more
Correct Answer (B)
2) In gas cutting, if too little cutting oxygen is supplied
the metal will be cooled down
the kerf will be narrow
the kert will be wide
the metal will fail to cut completely
Correct Answer (D)
3) The top edge is melted round and the cutface is not smooth in gas cutting. This is due to
extremely slow cutting speed
insufficient acetylene pressure
the tip being held too high
too much cutting oxygen pressure
Correct Answer (C)
4) In a gas cut plate, the cut shows groove sand has deep drag lines. This is due to
tip too close to the cut surface
too much travel speed
less oxygen pressure
smaller size cutting nozzle
Correct Answer (A)
5) In a gas cut plate, the cut is high quality although there is some surface roughness caused by vertical drag lines.This is due to
too slow cutting speed
smaller size cutting nozzle
less preheating flame
impure cutting oxygen
Correct Answer (C)
6) The size of the cutting nozzle used in oxyacetylene cutting process depends mainly on
purity of oxygen
thickness of metal to be cut
duration of cut
type of cutting blowpipe
Correct Answer (C)
7) Which of the following types is not fillet weld?
lap joint
Corner joint
butt joint
T-joint
Correct Answer (C)
8) Double-V and double-U butt welds are used for plates of thickness
1 – 5 mm
5 – 10 mm
10 – 15 mm
above 15 mm
Correct Answer (D)
9) Which material is not used for making non-consumable electrodes?
Graphite
Tungsten
Carbon
Sodium
Correct Answer (D)
10) Which of the following is an example of plastic welding?
Thermit welding
Forge welding
Gas welding
Arc welding
Correct Answer (D)
11) Which of the following is not a type of arc welding?
Electro-slag
Submerged
Plasma
Air-acetylene
Correct Answer (B)
12) Which of the following is an example of fusion welding?
Forge welding
Thermit welding with pressure
Arc welding
Resistance welding
Correct Answer (B)
14) In which of the following process, heat is created by blacksmith fire
Spot welding
Seam welding
Forge welding
Projection welding
Correct Answer (C)
15) Heat is created by chemical reaction in
Oxy-acetylene welding
Resistance welding
Thermit welding
Tungsten arc welding
Correct Answer (C)
16) In resistance welding, two electrodes are made of
Bronze
Copper
Iron
Aluminium
Correct Answer (B)
17) Acetylene can be prepared by the chemical reaction between
Water and Calcium carbonate
Hydrogen and Calcium carbonate
Hydrogen and Calcium carbide
Water and Calcium carbide
Correct Answer (A)
18) Which flame is suitable for cutting operations?
Oxidising flame
Carburising flame
Neutral flame
None of the above
Correct Answer (A)
19) Which flame is suitable for welding steel?
Oxidising flame
Carburising flame
Neutral flame
None of the above
Correct Answer (B)
20) Which of the following is not true for gas welding?
There are safety problems in storing and handling the gases
It is slower than arc welding
Heat effected zone and distortion are less as compare to arc welding
It is suitable for thin sheets
Correct Answer (C)
