Weldability Of Steel MCQ Question And Answer |ITI WELDER

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ITI Welder | Weldability of Steel MCQ

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1.
What is the current range required for 3.15mm dia MS electrode in arc welding?

40 - 50 A
50 - 60 A
70 - 80 A
100 - 110 A

2.
What is the name of last bit of an discarded electrode?

Red end
Dead end
Stub end
Waste end

3.
How many groups of mild steel pipes are there?

Two groups
Five groups
Four groups
Three groups

4.
How a pipe is specified?

Dia only
Length only
Outer dia only
Outer dia x inner dia x length

5.
What should be the bevel angle for edge preparation of 6mm thick pipe welding?

30° - 35°
40° - 45°
60° - 65°
70° - 75°

6.
What is the purpose of copper coating on mild steel filler rod used in gas welding?

Rust proof
Water proof
Moisture proof
Increased filler dia

7.
What is the defect in the weld joint shown in figure?

Overlap
Porosity
Reinforcement
Lack of penetration

8.
Which metal in welding process is subjected to “Weld decay” defect?

Brass
Copper
Mild steel
Stainless steel

9.
Which filler rod is used for bronze welding of cast iron, malliable iron and copper?

Manganese, Bronze, filler rod
Copper, Phosperous, filler rod
Copper, Phosperous alloy filler rod
Copper, Zinc, Nickel filler rod

10.
What does the third digit of AWS codification in EB 5426HJX represent?

Type of current
Type of covering
Type of tensile strength
Type of welding position

11.
Which accessory is used to protect the eyes during gas welding?

Helmet
Hand screen
Colour goggles
Grinding goggles

12.
What is the composition of acetylene gas?

C - 72.3% H - 27.7%
C - 82.3% H - 17.7%
C - 90% H - 10%
C - 92.3% H - 7.7%

13.
What is the name of the flame shown in figure?

Neutral flame
Oxidising flame
Carburising flame
Oxy-Acetylene flame

14.
Which size of CCMS filler rod is to be used for welding plate of 8mm thick with ‘V’ edge preparation?

3.15 mm Ø
4.0 mm Ø
5.0 mm Ø
6.3 mm Ø

15.
How many segments are to be selected for welding 50 mm j pipe?

3 segments
4 segments
6 segments
8 segments

16.
What type of edge preparation is needed, for gas welding a pipe, with wall thickness 6mm?

Single “V”
Single bevel
Square edge with root gap
Square edge without root gap

17.
How many equal divisions should be made while developing a “T” pipe joint?

4 equal divisions
6 equal divisions
9 equal divisions
12 equal divisions

18.
What is the name of small metal particles which are thrown out of the arc during welding?

Slag
Spatters
Stub end
Weld metal

19.
How the construction of a nozzle for gouging is identified?

Straight nozzle with single preheating hole
Bent nozzle with sectorial preheating holes
Fully bent nozzle with circular preheating holes
Slightly bent nozzle with circular preheating six holes

20.
What does the fourth digit indicate as per AWS electrode coding?

Welding current
Tensile strength
Welding position
Type of flux coating

21.
Which type of stainless steel is weldable?

Nickel type
Ferrite type
Stabilized type
Chromium type

22.
What is the pre-heating temperature of cast iron?

200 to 310°C
250 to 350°C
300 to 350°C
350 to 450°C

23.
What is the root run?

Backing run
The first run is root run
The third run is root run
The second run is root run

24.
What do you call the non - coated electrodes?

Row electrode
Bare electrode
Base electrode
Deep penetration electrode

25.
How is the electrode size identified?

Length of electrode
Thickness of flux coated
Diameter (over all) of electrode
Diameter of inner core wire

26.
What are the standard electrode lengths available?

250 mm and 350 mm
350 mm and 450 mm
400 mm and 500 mm
500 mm and 600 mm

27.
What is the grade of hacksaw blades with pitch 0.8mm?

Fine
Medium
Course
Rough

28.
What does the letter ‘X’ indicate in the electrode classification of EB5426 H1 J X?

Covered electrode
Increase metal recovery
Hydrogen controlled electrode
Radio graphic quality electrode

29.
What is the percentage of carbon in medium carbon steel?

0.05% to 0.30%
0.05% to 0.8%
0.30% to 0.6%
0.6% to 1.2%

30.
What is the defect of metal flowing into the surface of base metal without fusing it?

Over lap
Under cut
Lack of fusion
Lack of penetration

31.
What is the type of welding defect shown in given figure?

Crack
Blow hole
Burn through
Unfilled crater

32.
Which one of the defect is caused by low current in arc welding?

Poracity
Under cut
Lack of fusion
Excessive penetration

33.
What is the cause of hair line separation in the bead in arc welding?

Fast cooling
Slow cooling
Long arc length
Wrong selection of electrode

34.
What is the name of the steel material which are not weldable?

High carbon steel
Medium carbon steel
Austenitic stainless steel
Ferrite & martensitic stainless steel

35.
Which is used to cut thin pipes of smaller sizes?

Chisel
Hack sawing
Pipe cutter
Lathe parting tool

36.
What is the base for selecting the nozzle size for gas welding of a pipe?

Groove angle
Weldig position
Diameter of pipe
Pipe wall thickness

37.
Which type of filler rod shall contain higher percentage of iron?

Ferrous
Non - ferrous
Alloy type of ferrous metals
Alloy type of non - ferrous metals

38.
What is the process of heating steel to specific temperature and cooling suddenly?

Annealing
Hardening
Tempering
Quenching

39.
What is the main purpose of ‘Normalising’ steel?

To control hardness
To prevent cracking
To make welding operation easier
To produce fine grain of uniform structure

40.
What is the purpose of setting root gap?

To over some under cut
To control distortion
To get good penetration
Gap get closed due to expansion

41.
Which of the following metals have high thermal conductivity?

Brass
Bronze
Copper
Aluminium

42.
What is the process of hot weld joint rapidly hammered to relieve internal stresses?

Peening
Annealing
Heat treatment
Straightening

43.
Which type of cast iron possess higher hardness?

Grey cast iron
White cast iron
Nodular cast iron
Malleable cast iron

44.
Which type of cast iron is soft?

Grey cast iron
White cast iron
Nodular cast iron
Malleable cast iron

45.
Which size of filler rod should be used to weld 2mm thick MS sheet?

1.6 mm
2.0 mm
2.5 mm
3.15 mm

46.
What is the main function of the flux coating in electrodes?

To prevent rusting
To stabilize the arc
To control arc temperature
To increase welding current

47.
What is the purpose of oxygen lever in gas cutting?

Pre heat the base metal
Push the molten metal
Remove the excess metal
Release excess oxygen and to push the molten metal

48.
Which gauging nozzle is selected for rivet head cutting?

Bent nozzle with three pre-heating holes
Straight nozzle with six pre-heating holes
Bent nozzle with six holes
Flute cutting straight with six holes

49.
What is the name of the part ‘x’ shown of a portable cutting machine?

Speed control
Per-heat control
Vertical control
Horizontal control

50.
What benefit we get out of a carburising flame?

Suitable for brass, copper welding
Suitable for stellite, flame cleaning
Suitable for mildsteel, stainless steel
Suitable for pure aluminium, cast iron & brass welding

51.
What are the defects in generated acetylene gas?

Oxygen, hydrogen & carbon
Carbon monoxide unburit ash
Hydrogen, dust particles, ash
Hydrogen, lime dust, ammonia & water vapour

52.
What is the range of pressure gauge used in an oxygen cylinder used in gas welding?

120 to 150 Kg/cm2
110 to 150 Kg/cm2
100 to 150 Kg/cm2
90 to 150 Kg/cm2

53.
What should be the angle of filler rod, by rightward welding?

30° - 40°
40° - 50°
50° - 60°
60° - 70°

54.
What thickness of plate, gas welding by forehand technique can be used without edge preparation?

Up to 2.5 mm
Up to 3.15 mm
Up to 4 mm
Up to 5 mm

55.
What flux is used in welding brass?

Anti - borax
Borax paste
Cryolite and berium chloride
Zinc chloride and potassium dichromate

56.
What flux is to be used for gas welding stainless steel plates?

Borox flux
Anti - Borox
Cryolite and berium chloride
Zinc chloride and potassium dichromate paste

57.
Which filler rod to be used for gas welding aluminium?

Silicon - brass
Silicon - manganese
Copper - Silver alloy
Pure aluminium, 5% silicon aluminium alloy

58.
What should be the pre - heating temperature of aluminium job for gas welding?

200°C - 400°C
250°C - 400°C
300°C - 400°C
350°C - 400°C

59.
What is the base for selecting the nozzle size for gas welding of a pipe?

Groove angle
Weldig position
Diameter of pipe
Pipe wall thickness

60.
What is the welding position asper ASME for a pipe joint held vertically, welding in a horozontal line?

61.
What procedure is followed in welding pipe in 5 G position?

Rotate pipe and weld vertically
Pipe not rotated weld verticaliy
Pipe not rotated and pipe axis 450
Pipe welded 12’o clock to 6’o clock either by uphill or downhill method

62.
What size of CCMS filler rod is used for finish run of ɸ 50mm pipe root welded using ɸ1.65 filler?

ɸ 1.6 mm
ɸ 3.0 mm
ɸ 3.5 mm
ɸ 4.0 mm

63.
What size of electrode is used to weld 5 mm wall thickness pipe?

ɸ 2.5 mm
ɸ 3.15 mm
ɸ 4.00 mm
ɸ 5.00 mm

64.
Which test indicates the hardness of a metal?

Brinell test
Tensile test
Charpy izod test
Ultrasonic inspection

65.
What type of preheating is done only at the portions to be welded?

Full preheating
Local preheating
Direct preheating
Indirect preheating

66.
Which type of polarity is used in welding non ferrous metals?

AC Transformer
Reverse polarity
Straight polarity
DC Motor generator

67.
Which type of arc does not have control on the molten pool?

Long arc length
Short arc length
Normal arc length
Too short arc length

68.
Which of the following produces unstable arc?

Long arc length
Short arc length
Normal arc length
Too long arc length

69.
Which type of arc length produces poor penetration?

Long arc length
Short arc length
Normal arc length
Too long arc length

70.
What are the four clock positions, in pipe welding?

6, 12, 3, 9’o clock points
11, 5, 8, 2’o clock points
10,4, 1, 7’o clock points
9,3, 12, 6’o clock points

71.
What is the 6’o clock position in CW pipe welding refers to in 5G position?

Down hand position
Horizontal position
Over head position
Vertical up hill position

72.
What procedure is to be followed for welding pipes under 6G position?

Pipe not rotated weld vertical
Rotate pipe and deposit weld vertical
Pipe not rotated weld deposit horizontal
Pipe not rotated and pipe axis 45° angle deposit weld flat, vertical

73.
Which element filler rod is used to weld stainless steel plates?

Osmium
Punodium
Argentinum
Molybdenum, columbiam

74.
Which are the common alloying element of brass?

Copper and tin
Bismuth and tin
Antimony and tin
Copper & zinc

75.
Which of the following aluminium alloys consists of 1% iron & silicon?

Duralumin
Wrought alloy
Aluminium cast alloy
Commercially pure aluminium

76.
What is the purpose of cleaning of sheets before doing gas welding?

To avoid over lap
To avoid porosity
To avoid under cut
To Control distortion

77.
Which type welding uses a non - ferrous filler with melting point above 450°, than base metal?

Brazing
Soldering
Arc welding
Gas welding

78.
Which welding process enables to weld dis – similar metals?

Brazing
Seam welding
Spot welding
Fusion welding

79.
What type of gas flame is used to weld 2mm mild steel by brazing method?

Neutral flame
Carburising flame
Oxidising flame
Oxy-hydrogen flame

80.
Which system of welding is free from “Arc blow”?

AC welding
DC Reverse polarity
DC straight polarity
Welding with long arc

81.
What is the effect of expansion and contraction due to heat in welding?

Peening
Arc blow
Distortion
Metal force

82.
What is the type of distortion shown?

Wide distortion
Angular distortion
Transverse distortion
Longitudinal distortion

83.
Which one of the following methods of welding is not a method used to control distortion?

Skip welding
Back step welding
Right hand welding
Intermittent welding

84.
Which one of the below is to control distortion?

Use large size electrode
Use small size electrode
Use few passes with large electrode
Use more passes with small electrode

85.
What is the rule for deciding the length of intermediate tacks?

3 to 4 times plate thickness
2 to 3 times plate thickness
5 times the plate thickness
50mm irrespective of plate thickness

86.
Which type of cast iron offers greater resistance to shock?

Grey cast iron
White cast iron
Nodular cast iron
Malleable cast iron

87.
Which type of cast iron possess higher compressive strength?

Grey cast iron
White cast iron
Nodular cast iron
Malleable cast iron

88.
What is the angle of pipe axis with the base for making an elbow joint?

30°
45°
75°
90°

89.
What method is followed to make a circular gas cutting?

Using hand as a guide
Using a guide clamp fitted to torch body
Step by step cutting circular segments
Manual rotation on the circumference of the circle

90.
Why deposited bead is not in uniform size?

Incorrect flame setting
Wrong angle of blow pipe
Wrong angle of filler rod
Variation in speed of travel and angle

91.
Which element is present in contact electrodes in large proportion?

Carbon
Silicon
Manganese
Iron powder.

92.
Which size of filler rod should be used to weld 2.5mm thickplates,using nozzle 5 by leftward technique?

1.60 mm
2.00 mm
2.50 mm
3.15 mm

93.
Which process causes the increase in the strength of part after fabrication?

Hardening
Tempering
Quenching
Normalising

94.
How the repairs of cracks in cast iron component carrried out?

By using clamps during welding process
Similar to arc welding mild steel plate
Local preheating, leftword welding technique flame heating each layer
Cracks repaired using appropriate electrode

95.
Which heat treatment process causes the reduction of brittleness in the steel?

By annealing
By hardening
By tempering
By normalising

96.
What is the cause of porosity in arc welding?

Damp electrodes
Carbon electrodes
Over size electrodes
Low hydrogen electrodes

97.
What is the welding defect in base metal gets melted and a groove formed along the toe of the weld?

Undercut
Blow holes
Reniforcement
Lack of penetration

98.
What is the name of the steel material that is not weldable?

High carbon steel
Medium carbon steel
Austenitic stainless steel
Ferrite & martensitic stainless steel

99.
What is the defect due to non cleaning the surfaces before welding?

Over lap
Lack of fusion
Surface porosity
Small cracks in bead

100.
What is the reason for lack of fluidity in molten metal in braze welding?

Over heating
Improper flame
Inadequate preheating
Improper cleaning and less use of flux

101.
What defect can be eliminated by this welding method?

Cracks
Arc blow
Distortion
Under cut

102.
What is the reason for the defect of more spatter during arc welding?

Insufficient root gap
Welding current too high
Wrong angle of electrode
Use of a very short arc length

103.
What is the welding defect, with no fusion of base metal on root face, side face or between the weld run?

Porosity
Under cut
Lack of fusion
Lack of penetration

104.
What is the defect shown in the figure?

Over lap
Porosity
Under cut
Lack of penetration

105.
What is the result of inner cone of flame touching the molten metal while welding?

Cause to over lap
Cause to back fire
Cause to porosity
Cause to flame snape out

106.
What defect will occur due to incorrect tilt of blow pipe?

Crater at end
Weld porosity
Lack of root penetration
Under cut in weld joints

107.
How is the scale and oxide removed from stainless steel weld?

Peening
Cooling in oil
Cooling in sand
Heating up to 9500 to11000C and quenched in water

108.
What makes for the buckling of weld joint, in stainless steel during cooling?

Over heated zone
Low thermal conductivity
Chromium contamination
High thermal conductivity

109.
What is the name of short weld made prior to the welding to hold the plates in perfect alignment?

Bead weld
Tack weld
String bead
Strong weld

110.
What is the type of distortion shown?

Arc blow
Angular distortion
Transverse distortion
Longitudinal distortion

111.
What is the method of controlling method of distortion shown?

Tacking
Pre bending
Jigs and fixture
Diverging allowance

112.
What is the method of controlling method of distortion shown?

Root gap
Arc length
Pre bending
Diverging allowance

113.
What is the type of distortion shown?

Length distortion
Angular distortion
Transverse distortion
Longitudinal distortion

114.
What type of defect will occur due to evaporation of the trapped gas from the liquid metal?

Arc blow
Porosity
Over lap
Crack

115.
Which welding the slag inclusion defect will occur?

Manual metal arc welding
Tungsten invert gas welding
Malattic invert gas welding
Oxy – acetylene gas welding

116.
What will happen if the current is low while arc welding?

Formed over lap
Spatterns are more
Electrode fused speedly
Base metal edges not melt properly

117.
What is the use of intermediate tacks on a weld setting of plates?

To reduce the welding run
To control defects in weld joint
To speed up the welding joint
Align and to maintain the position of joint

118.
What is the main reason, that aluminium is difficult to weld?

Less weight
Oxide formation
High thermal conductivity
Better strength weight ratio

119.
When does the defect of gouging on cutting face takes place?

Too much pre- heating
Too slow cutting speed
Excessive speed, inadequate pre- heating
Too much cutting oxygen pressure

120.
What method of heating is done to remove bending distortion of weld joint with wedge shaped area?

Spot heating
Pipe - needle heating
Triangular heating
Checker - board heating

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Weldability of Steel MCQ Question and Answer |ITI WELDER

PLEASE SELECT YOUR LANGUAGE FROM BELOW

ITI Welder | Weldability of Steel MCQ

PLEASE SELECT YOUR LANGUAGE FROM BELOW

1.What is the current range required for 3.15mm dia MS electrode in arc welding?

2.What is the name of last bit of an discarded electrode?

3.How many groups of mild steel pipes are there?

4.How a pipe is specified?

5.What should be the bevel angle for edge preparation of 6mm thick pipe welding?

6.What is the purpose of copper coating on mild steel filler rod used in gas welding?

7.What is the defect in the weld joint shown in figure?

8.Which metal in welding process is subjected to “Weld decay” defect?

9.Which filler rod is used for bronze welding of cast iron, malliable iron and copper?

10.What does the third digit of AWS codification in EB 5426HJX represent?

11.Which accessory is used to protect the eyes during gas welding?

12.What is the composition of acetylene gas?

13.What is the name of the flame shown in figure?

14.Which size of CCMS filler rod is to be used for welding plate of 8mm thick with ‘V’ edge preparation?

15.How many segments are to be selected for welding 50 mm j pipe?

16.What type of edge preparation is needed, for gas welding a pipe, with wall thickness 6mm?

17.How many equal divisions should be made while developing a “T” pipe joint?

18.What is the name of small metal particles which are thrown out of the arc during welding?

19.How the construction of a nozzle for gouging is identified?

20.What does the fourth digit indicate as per AWS electrode coding?

21.Which type of stainless steel is weldable?

22.What is the pre-heating temperature of cast iron?

23.What is the root run?

24.What do you call the non - coated electrodes?

25.How is the electrode size identified?

26.What are the standard electrode lengths available?

27.What is the grade of hacksaw blades with pitch 0.8mm?

28.What does the letter ‘X’ indicate in the electrode classification of EB5426 H1 J X?

29.What is the percentage of carbon in medium carbon steel?

30.What is the defect of metal flowing into the surface of base metal without fusing it?

31.What is the type of welding defect shown in given figure?

32.Which one of the defect is caused by low current in arc welding?

33.What is the cause of hair line separation in the bead in arc welding?

34.What is the name of the steel material which are not weldable?

35.Which is used to cut thin pipes of smaller sizes?

36.What is the base for selecting the nozzle size for gas welding of a pipe?

37.Which type of filler rod shall contain higher percentage of iron?

38.What is the process of heating steel to specific temperature and cooling suddenly?

39.What is the main purpose of ‘Normalising’ steel?

40.What is the purpose of setting root gap?

41.Which of the following metals have high thermal conductivity?

42.What is the process of hot weld joint rapidly hammered to relieve internal stresses?

43.Which type of cast iron possess higher hardness?

44.Which type of cast iron is soft?

45.Which size of filler rod should be used to weld 2mm thick MS sheet?

46.What is the main function of the flux coating in electrodes?

47.What is the purpose of oxygen lever in gas cutting?

48.Which gauging nozzle is selected for rivet head cutting?

49.What is the name of the part ‘x’ shown of a portable cutting machine?

50.What benefit we get out of a carburising flame?

51.What are the defects in generated acetylene gas?

52.What is the range of pressure gauge used in an oxygen cylinder used in gas welding?

53.What should be the angle of filler rod, by rightward welding?

54.What thickness of plate, gas welding by forehand technique can be used without edge preparation?

55.What flux is used in welding brass?

56.What flux is to be used for gas welding stainless steel plates?

57.Which filler rod to be used for gas welding aluminium?

58.What should be the pre - heating temperature of aluminium job for gas welding?

59.What is the base for selecting the nozzle size for gas welding of a pipe?

60.What is the welding position asper ASME for a pipe joint held vertically, welding in a horozontal line?

61.What procedure is followed in welding pipe in 5 G position?

62.What size of CCMS filler rod is used for finish run of ɸ 50mm pipe root welded using ɸ1.65 filler?

63.What size of electrode is used to weld 5 mm wall thickness pipe?

64.Which test indicates the hardness of a metal?

65.What type of preheating is done only at the portions to be welded?

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

67.Which type of arc does not have control on the molten pool?

68.Which of the following produces unstable arc?

69.Which type of arc length produces poor penetration?

70.What are the four clock positions, in pipe welding?

71.What is the 6’o clock position in CW pipe welding refers to in 5G position?

72.What procedure is to be followed for welding pipes under 6G position?

73.Which element filler rod is used to weld stainless steel plates?

74.Which are the common alloying element of brass?

75.Which of the following aluminium alloys consists of 1% iron & silicon?

76.What is the purpose of cleaning of sheets before doing gas welding?

1.
What is the current range required for 3.15mm dia MS electrode in arc welding?

2.
What is the name of last bit of an discarded electrode?

3.
How many groups of mild steel pipes are there?

4.
How a pipe is specified?

5.
What should be the bevel angle for edge preparation of 6mm thick pipe welding?

6.
What is the purpose of copper coating on mild steel filler rod used in gas welding?

7.
What is the defect in the weld joint shown in figure?

8.
Which metal in welding process is subjected to “Weld decay” defect?

9.
Which filler rod is used for bronze welding of cast iron, malliable iron and copper?

10.
What does the third digit of AWS codification in EB 5426HJX represent?

11.
Which accessory is used to protect the eyes during gas welding?

12.
What is the composition of acetylene gas?

13.
What is the name of the flame shown in figure?

14.
Which size of CCMS filler rod is to be used for welding plate of 8mm thick with ‘V’ edge preparation?

15.
How many segments are to be selected for welding 50 mm j pipe?

16.
What type of edge preparation is needed, for gas welding a pipe, with wall thickness 6mm?

17.
How many equal divisions should be made while developing a “T” pipe joint?

18.
What is the name of small metal particles which are thrown out of the arc during welding?

19.
How the construction of a nozzle for gouging is identified?

20.
What does the fourth digit indicate as per AWS electrode coding?

21.
Which type of stainless steel is weldable?

22.
What is the pre-heating temperature of cast iron?

23.
What is the root run?

24.
What do you call the non - coated electrodes?

25.
How is the electrode size identified?

26.
What are the standard electrode lengths available?

27.
What is the grade of hacksaw blades with pitch 0.8mm?

28.
What does the letter ‘X’ indicate in the electrode classification of EB5426 H1 J X?

29.
What is the percentage of carbon in medium carbon steel?

30.
What is the defect of metal flowing into the surface of base metal without fusing it?

31.
What is the type of welding defect shown in given figure?

32.
Which one of the defect is caused by low current in arc welding?

33.
What is the cause of hair line separation in the bead in arc welding?

34.
What is the name of the steel material which are not weldable?

35.
Which is used to cut thin pipes of smaller sizes?

36.
What is the base for selecting the nozzle size for gas welding of a pipe?

37.
Which type of filler rod shall contain higher percentage of iron?

38.
What is the process of heating steel to specific temperature and cooling suddenly?

39.
What is the main purpose of ‘Normalising’ steel?

40.
What is the purpose of setting root gap?

41.
Which of the following metals have high thermal conductivity?

42.
What is the process of hot weld joint rapidly hammered to relieve internal stresses?

43.
Which type of cast iron possess higher hardness?

44.
Which type of cast iron is soft?

45.
Which size of filler rod should be used to weld 2mm thick MS sheet?

46.
What is the main function of the flux coating in electrodes?

47.
What is the purpose of oxygen lever in gas cutting?

48.
Which gauging nozzle is selected for rivet head cutting?

49.
What is the name of the part ‘x’ shown of a portable cutting machine?

50.
What benefit we get out of a carburising flame?

51.
What are the defects in generated acetylene gas?

52.
What is the range of pressure gauge used in an oxygen cylinder used in gas welding?

53.
What should be the angle of filler rod, by rightward welding?

54.
What thickness of plate, gas welding by forehand technique can be used without edge preparation?

55.
What flux is used in welding brass?

56.
What flux is to be used for gas welding stainless steel plates?

57.
Which filler rod to be used for gas welding aluminium?

58.
What should be the pre - heating temperature of aluminium job for gas welding?

59.
What is the base for selecting the nozzle size for gas welding of a pipe?

60.
What is the welding position asper ASME for a pipe joint held vertically, welding in a horozontal line?

61.
What procedure is followed in welding pipe in 5 G position?

62.
What size of CCMS filler rod is used for finish run of ɸ 50mm pipe root welded using ɸ1.65 filler?

63.
What size of electrode is used to weld 5 mm wall thickness pipe?

64.
Which test indicates the hardness of a metal?

65.
What type of preheating is done only at the portions to be welded?

66.
Which type of polarity is used in welding non ferrous metals?

67.
Which type of arc does not have control on the molten pool?

68.
Which of the following produces unstable arc?

69.
Which type of arc length produces poor penetration?

70.
What are the four clock positions, in pipe welding?

71.
What is the 6’o clock position in CW pipe welding refers to in 5G position?

72.
What procedure is to be followed for welding pipes under 6G position?

73.
Which element filler rod is used to weld stainless steel plates?

74.
Which are the common alloying element of brass?

75.
Which of the following aluminium alloys consists of 1% iron & silicon?

76.
What is the purpose of cleaning of sheets before doing gas welding?

77.
Which type welding uses a non - ferrous filler with melting point above 450°, than base metal?

78.
Which welding process enables to weld dis – similar metals?

79.
What type of gas flame is used to weld 2mm mild steel by brazing method?

80.
Which system of welding is free from “Arc blow”?