20) If the blowpipe is moved to and fro frequently while cutting the kerf will

be more

of correct size

be less

not be affected

Answer is:

be more

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21) In gas cutting, if too little cutting oxygen is supplied

the metal will be cooled down

the kerf will be narrow

the kerf will be wide

cutting the metal will be failed completely

Answer is:

cutting the metal will be failed completely

22) The top edge is melted round and the cut face is not smooth in gas cutting. This is due to

extremely slow cutting speed

insufficient acetylene pressure

the tip being hold too high

too much cutting oxygen pressure

Answer is:

the tip being hold too high

23) In a gas cut plate, the cut shows grooves and 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

Answer is:

tip too close to the cut surface

24) 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

less preheating flame

impure cutting oxygen

too slow cutting speed

smaller size cutting nozzle

Answer is:

too slow cutting speed

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20) If the blowpipe is moved to and fro frequently while cutting the kerf will

be more

Welding MCQ with Answers

Related Welding MCQ with Answers

21) In gas cutting, if too little cutting oxygen is supplied

cutting the metal will be failed completely

22) The top edge is melted round and the cut face is not smooth in gas cutting. This is due to

the tip being hold too high

23) In a gas cut plate, the cut shows grooves and has deep drag lines. This is due to

tip too close to the cut surface

24) 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

Welding MCQ with Answers