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)

 

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