Welding Techniques MCQ Question and Answer | ITI WELDER

ITI Welder Trade Welding Techniques MCQ Question and Answer for CBT Online exam for NCVT AITT (All India Trade Test).  Practice all WELDER Trade MCQ (Multiple choice Question). Also you can practice mock test exam online

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ITI Welder | Welding Techniques MCQ

12.

What is defined as vertical position of groove welding?

1. 1G
2. 2G
3. 3G
4. 6G

13.

Which type of metal is used in a welding cable?

1. Iron
2. Brass
3. Bronze
4. Copper

14.

Which of the following gas is used in TIG welding?

1. Helium
2. Oxygen
3. Hydrogen
4. Carbon dioxide

15.

Which of the accessories should be worn during overhead welding?

1. Helmet
2. Sun glass
3. Hand screen
4. Welding goggles

16.

Which one of the following do not assist fire?

1. Fuel
2. Oxygen
3. Ignition
4. Nitrogen

17.

Which type of polarity is used in aluminium welding?

1. Rectifier set
2. AC Transformer
3. Reverse polarity
4. Straight polarity

18.

What is polarity?

1. Circuit of current
2. Direction of current
3. Open circuit of current
4. Opp direction of current

19.

What is the effect of long arc in welding?

1. Normal penetration
2. More penetration
3. Less penetration
4. Less weld deposit

20.

Which type of polarity used in bare wire electrode?

1. Straight polarity
2. Reverse polarity
3. AC Transformer
4. Rectifier set

21.

What is the name of the weld joint showing the symbol “A”?

1. Backing weld
2. Square butt weld
3. Single J butt weld
4. Single V butt weld

22.

What is the name of the type of joint for the symbol shown in “D”?

1. Concave fillet
2. Convex double “V” butt
3. Flat (Flush) Single V butt weld
4. Flat (Flush) V butt weld with backing run

23.

What are the two types of MS pipes?

1. Forged pipe / Rolled pipe
2. Striprolled / moulded type
3. Bent sheet pipe / Hot forged
4. Seamless pipe / Resistance welded pipe

24.

What is the name of the type of joint for the symbol shown in “C”?

1. Concave fillet
2. Convex double “V” butt
3. Flat (Flush) Single V butt weld
4. Flat (Flush) V butt weld with backing run

25.

Which type of electrode produces short arc length?

1. Heavy coated electrodes
2. Light coated electrodes
3. Medium coated electrodes
4. Super heavy coated electrodes

26.

Which type of arc length produces deep penentration weld?

1. Long arc length
2. Short arc length
3. Medium arc length
4. Too long arc length

27.

What is the conversion function of a rectifier?

1. AC to AC
2. DC to DC
3. AC to DC
4. DC to AC

28.

Which arc length produces correct fusion?

1. Long arc length
2. Short arc length
3. Normal arc length
4. Too long arc length

29.

Which type of polarity is used in welding non ferrous metals?

1. AC Transformer
2. Reverse polarity
3. Straight polarity
4. DC Motor generator

30.

Which is used for arc welding if there is no electric power supply?

1. Rectifier set
2. Transformer set
3. Motor generator set
4. Engine generator set

31.

What is the angle of electrode while welding in vertical position?

1. 60° to 70°
2. 70° to 80°
3. 80° to 90°
4. 90° to 100°

32.

Which type of arc produces humming sound?

1. Long arc length
2. Short arc length
3. Normal arc length
4. Too long arc length

33.

Which types of arc length used in thin sheet metals?

1. Long arc length
2. Short arc length
3. Medium arc length
4. Deep short arc length

34.

Which type polarity used in sheet metal welding?

1. Rectifier set
2. AC Transformer
3. Reverse polarity
4. Straight polarity

35.

Which polarity is used in welding with heavy and super heavy coated electrodes?

1. AC Transformer
2. Reverse polarity
3. Straight polarity
4. AC Motor generator

36.

Which polarity used in welding cast iron?

1. Rectifier set
2. AC Transformer
3. Reverse polarity
4. Straight polarity

37.

What should be the angle of electrode in the flat position welding?

1. 50° to 70°
2. 60° to 70°
3. 70° to 80°
4. 80° to 90°

38.

What should be the angle of electrode in horizontal position welding?

1. 45° to 55°
2. 55° to 65°
3. 70° to 80°
4. 80° to 90°

39.

What should be the angle of electrode in vertical position?

1. 60° to 70°
2. 70° to 80°
3. 80° to 90°
4. 90° to 100°

40.

What is the size of nozzle suitable for welding 50mm dia pipe, with 3.15mm wall thickness?

1. 5
2. 7
3. 10
4. 13

41.

What is the purpose of wrapping the weld cable around the job in welding?

1. To control arc blow
2. To control arc speed
3. To control arc length
4. To control distortion

42.

What is the purpose of fixing run on, run off plates in arc welding?

1. Control arc blow
2. Control porosity
3. Control distortion
4. Control over heating

43.

Which defect can be controlled by keeping a magnetic bridge on the top of the groove joint?

1. Arc blow
2. Distortion
3. Uneven bead
4. Slag inclusion

44.

What defect you find in the given figure?

1. Arc blow
2. Over lap
3. Under cut
4. Distortion

45.

Which among the joints are covered under fillet group?

1. T joint, Lap joint
2. T joint, Corner joint
3. Corner joint, Edge joint
4. T joint, Lap joint, Corner joint, Edge joint

46.

What happens if the root gap is lesser than one sixth of plate thickness?

1. More chances of distortion
2. More penetration will result
3. Likely defects like blowhole, porosity
4. Base metal not fused till the bottom of joint

47.

Which arc length produes popping sound?

1. Long arc length
2. Short arc length
3. Normal arc length
4. Too long arc length

48.

What arc length should be used to reduce the spatter?

1. Long arc length
2. Short arc length
3. Normal arc length
4. Too long arc length

49.

What is the indication of wrong polarity in DC welding?

1. Electrode become red hot
2. Electrode will freeze with the job
3. Excess spatters and poor penetration
4. It will produce edge of plates melted off

50.

How do you name the depression formed at the end of the weld?

1. Crack
2. Crater
3. Pin hole
4. Blow hole

51.

What will be the effect of magnetic fields shown in the figure below?

1. Electrode gets over heated
2. Electrode slics to base metal
3. Excess melting of base metal
4. Arc is deviated from it’s original path

52.

What defect will occur due to magnetic field while using DC supply in arc welding?

1. Crack
2. Arc blow
3. Over lap
4. Distortion

53.

Which defect will occur, when the equipment is changed for AC to DC supply in arc welding?

1. Arc blow
2. Over lap
3. Weld crack
4. Distortion

1.

Which type of transformer used in arc welding?

1. Step up
2. Step down
3. One - to - one
4. Capable of increasing supply voltage

2.

Which position is advantageous for easy welding?

1. Flat
2. Vertical
3. Over head
4. Horizontal

3.

Which one of the following is used to convert AC to DC supply in a welding machine?

1. Rectifier set
2. Motor generator set
3. Engine generator set
4. Welding transformer

4.

What is the metal used to make earth clamp in a welding machine?

1. Iron
2. Brass
3. Aluminium
4. Copper alloy

5.

How much current should be set, to weld a 10 mm thick plates, by arc welding?

1. 70 Amps
2. 80 Amps
3. 90 Amps
4. 110 Amps

6.

What is the term for the depth of fusion, from the surface of the weld metal plate?

1. Leg length
2. Fusion zone
3. Penetration
4. Heat affected zone

7.

What should be the angle for a double bevel butt joint?

1. 45°
2. 35°
3. 25°
4. 20°

8.

What is the name of joint if two members welded in the same plane?

1. Lap joint
2. Tee joint
3. Butt joint
4. Edge joint

9.

What is the easiest position to weld?

1. Flat
2. Vertical
3. Over head
4. Horizontal

10.

What is the symbol of welding?

1. Spot weld
2. Fillet weld
3. Single J butt
4. Backing run / weld

11.

What is the shape of weld finish symbol?

1. Convex symbol
2. Contour symbol
3. Concave symbol
4. Contour surface chipped