Cswip_3(1)

Page 1 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No. 1

QUESTION What two function in arc welding must be in equilibrium to enable a stable arc established

A

Arc Voltage

B

Current

C Wire / Electrode feed rate D 2

Metal burn off rate Welds made with high heat inputs show a reduction in one of the following properties

A

Ductility

B

Toughness

C Fatigue Strength D 3

Mechanical Strength The use of a cellulosic electrode is often made in the field. This is because

A

Hydrogen controle is needed

B

Iron powder in the electrode

C Higher arc voltage can be obtained D 4

Shoter arc voltage can be obtained The weld metal deposit of metal arc electrodes achieve its mechanical strength thrrough

A

The core wire

B

The flux coating

C Iron powder with the flux coating What constituent is needed in a coating of an electrode to prevent the formation of property in welding of a Rimming steel

5 A

Iron powder

B

Calcium fluoride

C Silicon D 6

Calsium carbonate In the welding of austinitic pipework the bore in usually purged with argon to

A

Prevent the formation of the porsity in the weld

B

Prevent the burn through in the root bead

C Prevent oxidation of the root bead D 7

Eliminate the formation of Hydrogen In MMA welding what parameter is used for the control of penetration into the base material

A

Voltage

B

Welding speed

C Iron powder in the coating D 8

Current WHAT TYPE OF POWER SOURCE CHARECTISTIC IS REQUIRED FOR MANUEL WELDING

A

Constant voltage

B

Flat charectristic

C Drooping charesterstic D

Motor generator

Mathew.N .Samuel

Page 2 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No.

QUESTION In MAG/Co2 welding which parameters gives the greastest control of weld appearance during dip transfer or short circuting welding

9 A

Wire stic out length

B

Amperage

C Wire feed speed D

Inductance In MMA welding the slags produced can be variod to suit the welding position which type of slag would be required for welding in the HV poition

10 A

Fluid

B

Viscous

C None of the above D 11

Semi fluid A controlled heat input, Higher heeat input shows

A

Have poor profile

B

Have large grain size

C Have high hardness in the HAZ D 12

Have low elongation properties During Co2 welding the arc length is most likely to be affected by

A

The wire diameter

B

Torch to work angle

C Inductance D 13

Current return connection In friction welding is the metal at the interface in the

A

Liquid state

B

Siolid state

C Plastic state D

Elastic state Which one of the following type of steel would give rise to the formation of prosity when autogenously welded with an arc process

14 A

Fully killed steel

B

Semi killed steel

C Rimming steel D 15

Fine grained steel Submerged arc fluxes can be supplied in two forms, thees are

A

Sintered

B

Agitated

C Crushed D 16

Fussed and agglomerated Which one of the following process used the keyholing system of fusion

A

Friction welding

B

Diffusion bonding

C Electron beam welding Mathew.N .Samuel

Page 3 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No. D

QUESTION Autogenous TIG welding

Mathew.N .Samuel

Page 4 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No. 17

QUESTION In accordance with BS 499 what is the weld junction

A

The area containing HAZ and weld metal

B

The weld metal and parent metal

C The boundry between the fusion zone and HAZ D 18

The part of the weld which undergoes metallurgical change due to heat from welding Which of the following are essential factors for lamellar tearing

A

High residual stress,poor through thickness ductility existing plate lamination

B

Poor through thickness ductility, fusion face parallel with rolled direction of parent plate, most commonly occurs in butt welds

C Stress poor through thickness ductility,fusion face parallel with rolled direction of parent meterial D 19

Tensile stress,deoxidised parent plate, poor through thickness ductility In gas welding, leftward welding is described in BS 499 as

A B

The flame is directed towards the welded part and filler material is directed toward unwelded part of the joint The flame and filler mqaterial are both directed towards welded part of the joint

The flame is directed towards the unwelded part and the filler material is dierected towards welded part C of the joint D

The flame and filler mqaterial are both directed towards unwelded part of the joint Which of the following is not a fusion welding process

20 A

Thermit welding

B

Electro slag welding

C Laser welding D 21

Friction welding In submerged arc welding the use of the excessively high voltage would result in

A

Insufficiant flux melting

B

Excessive flux melting

C Slag removal difficulties D

Spatter Which one of the following destructive tests would indicate the toughness of weld metal

22 A

Macro

B

Nick break

C Hardness D

Charpy Vee notch

A

Name the fourth weld process crack which has a totally different formation mechanism to HICC, Solidification cracking and lamellar tearing Liquation cracking

B

Re heat cracking

23

C Crater cracking D

Hot tearing Planer defects are best described as

24 A

Linear from at least one direction

B

Round indications

C Linear from at least one direction with volum Mathew.N .Samuel

Page 5 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No. D

QUESTION May be classed as all of the above

Mathew.N .Samuel

Page 6 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No.

QUESTION Which of the following welding process is not classed as an arc welding process

25 A

Electroslag welding

B

Thermit welding

C Plasma welding D

Both A and B

E

All of the above Which of the following material has poorest wekdability

26 A

Austenitic stainless steel

B

Martensitic stainless steel

C Carbon manganese steel D

HSLA steel Which of the following in a fusion weld usually has the highest tensile strength

27 A

Weld metal

B

Parent metal

C Heat affected zone D

Fusion zone Which of the following is a alternative name for a crater crack

28 A

Cold crack

B

Tearing

C Star crack D

Fatigue crack Which sub atomic particle has a positive charge

29 A

Proton

B

Photon

C Electron D

Neutron Which material is the most susceptible to re heat cracking

30 A

High carbon steels

B

Killed steels

C Creep resistance steels D

Austenitic steel Three essential factors for producing a fusion weld are ;Melting, the removal of surface oxide from the joint surfaces and elimination of atmosphere region of the arc Name the fourth

31 A

The weld must be free from stress

B

The filler metarial must match that of the weld

C The completed joint must at leased match the mechanical properties D

An arc for a heat source

Mathew.N .Samuel

Page 7 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No.

QUESTION Which are welding process /technique is likely to be uwed to repair localised porosity in a weld

32 A

MMA-PG position

B

Mechanical arc welding

C All of the above D

None of the above

E

Sub arc welding

33

Awelder qualified in the PG position would normally be qualified for welding A

All diameter of pipe

B

Welding postions PA, PC, PG and PF

C In postion PG only D 34

All pipe wall thickness Which of the following are considered to be heat affected zone cracks

A

Solidification cracks, Lamellar tearing and reheat cracks

B

Reheat crackes, liquation cracks and solidification cracks

C Hydrogen cracks, solidification cracks and liquation cracks D 35

Reheat crackes, liquation cracks and Hydrogen cracks Which of the following standard is entitled Visual Inspection of Fusion welded joints

A

BS 4515

B

BS 5289

C BS 5135 D 36

BS EN 440 In general it is not easy to mechanise the MMA welding process because

A

Short electrode lengths, the control of the arc length and the process uses a flat charecteristic

B

Short electrode lengths, the control of the arc length and flux covering

C The control of the arc length, stop start problems and short electrode lengths D 37

Flux coverings, short electrode lengths and the relationship between amps and volts Which of the following statements is true

A

Oxygen-fuel gas cutting is essentially an oxidation thermal cutting process

B

Oxygen-fuel gas cutting is essentially a melting process

C The only fuel gas is acetylene. D 38

Propane is the preffered fuel gas in oxygen-fuel gas cutting as it produce a hotter flame Which of the following best describes a semi- automatic welding process

A

The welder is responsible for the arc gap and travel speed

B

The welder is responsible for the arc gap and travel speed only

C The welding plant controls both travel speed and arc gap but under constent supervision D

The welding plant controls both travel speed and arc gap no supervision required In accordance with BS 5135 which of the following is applicable for scale C with regards to hydrogen content per 100g of deposited weld metal

39 A

> 15ml

B

>15 < 25ml

C >10 < 15ml Mathew.N .Samuel

Page 8 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No. D

QUESTION > 5 <10ml

Mathew.N .Samuel

Page 9 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No. 40

QUESTION Which is the correct heat input if the amps are 350, volts 32 and travel speed 310mm/min

A

2.16 kJ/mm

B

0.036 kJ/mm

C 2160 kJ/mm D

36 kJ/mm In accordance with BS 5135 what is the minimum distance the pre heat shall be applied from the joint preparation

41 A

100mm

B

25mm

C 75mm D

Not specified In accordance BS 5135 what is the recommended minimum time allowe for the pre heat temprature to equalise

42 A

2 min for each 25mm of parent metal thicknes

B

5 min for each 25mm of parent metal thicknes

C 2 min for each 50mm of parent metal thicknes D 43

5 min for each 50mm of parent metal thicknes Which of the following welding process would you expect to use a collet

A

TIG/TAG

B

MIG/MAG

C MMA-PG position D 44

All of the above Which of the following may be used for the TIG/TAG welding of austonitic stainless steel

A

Lathanum electrode,dc -ve

B

Cerium electrode dc -ve

C Zirconium electrode ac D

Thorium electrode, dc +ve Which of the following may be standared is entiteled Electrodes wires and fluxes for the Submerged arc welding process of carbon steel and medium tensile steel

45 A

BS 639

B

BS 2901

C BS 2633 D 46

BS 4165 Which of the following process use a constant voltage charectristic

A

Sub-arc <1000 amps,MMA, Electroslag

B

TIG/TAG, Sub arc >1000 amps Electroslag

C Sub-arc <1000 amps,MIG/MAG, Electroslag D 47

MIG/MAG, Sub arc >1000amps, Electroslag What are the possible results of having a too lower heat input

A

An increase in hardness, lower yield strength and lack of fusion

B

A reduction in touhness,hydeogen entrapment and an increase in hardness

C Entrapped hydogen, an increase in hardness and lack of fusion Mathew.N .Samuel

Page 10 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No. D

QUESTION Entrapped hydogen, a reduction in carbon content and fusion A multi run MMA butt weld made on C/Mn steel consists of 5 passes using 6 mmm electrodes. A

48

12 passes made on the same joint using 4mm electrodes on the same material will; A

Have a lower heat input and a higher degree of grain refiement

B

Have a lower heat input and a coarser grain structure.

C Have a lower amount of distortion and higher degree of grain refinment D

Have ahigher amount of distortion and lower degree of grain refinement

A

The main reason for using a back purging when welding 18-8 stainless steel with TIG welding process is to: Control the root penetration

B

Propane is the preffered fuel gas in oxygen-fuel gas cutting as it produce a hotter flame

49

C Prevent root bead porosity D

Prevent the formation off a dense oxide layer on the root

A

A typical minimum pro heat temprature for an MMA weld made on steel with a carbon content pf 0.23% and a manganese content of 1.3% Pre heat would normally be required

B

Less than 50° C

50

C A minimum of 100°C D

Above 280°C Which is often the hardest part of a multi run weld made using MMA

51 A

The heat affected zone of the root

B

The heat affected zone of the cap

C The root D

The caap The heat affected zone of a fusion weld

52 A

Usually has highest tensile strength

B

Cannot be avoided

C Is usually martensitic D

Both A and B

E

All of the above

A

The heat affected zone associated with a fusion weld on steel has up to how many seprate regions of microstructure 4

B

6

53

C 1 D

2 The possible effects of having a travel speed too fast

54 A

Low toughness, slag inclusion and undercut

B

High hardness, slag inclusion and a narrow thin weld bead

C High hardness, excessive deposition and cold lap D

Low toughness, poor fusion and slag inclusions

Mathew.N .Samuel

Page 11 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No.

QUESTION

A

What five parameters would be checked when calibrating welding equipment for mechanised MAG welding Joint stup,Flux coating, Polarity, Travel speed and amps/volts

B

Amps / volts, WFS, gas flow rate, polarity and travel speed.

55

C Amps / volts, WFS, wire diameter, polarity and travel speed. D

Electode sticout, WFS, amps/ volts, polarity and wire diameter Which of the following statements is true when using a flat charectistic power source

56 A

The electrode is always dc -ve

B

The shielding is always pure argon

C The wire feed speed remains constant D

The electrode extension will vary the most when varying the arc length Which of the following will vary the most when varying the arc length

57 A

Voltage

B

Amperage

C Polarity D

None of the above Which is the following statements is true

58 A

The core wire ina MMA electrode has higher melting point than the flux

B

Electrode dc positive is used when welding with the MIG/MAG welding process

C The HAZ of a carbon manganese steel weld usualy has a lower ultimate tensile strength than the weld D

All of the above Which of the following is most likely to reduce the chances of arc blow

59 A

A change from AC to DC current

B

A change from DC to AC current

C A change from DC electode +ve to DC -ve D

A change from DC electode -ve to DC +ve If a steel has Ceq% of 0.48%

60 A

Post weld heat treatment would always be necessary

B

It will probably require a pre heat temprature above 300°C prior to welding

C It will probably require a pre heat temprature above 100°C prior to welding D

The heat affected zone will be very tough

A

When welding a double vee butt joint with SAW process the presence of centere line porosity may be due to Damp flux

B

Contaminated joint preparation

61

C Incorrect stic out lengths D 62

All of the above

When considering the advantage of site radiography over ultrasonic which of the following applies A permanent record produced, good for detecting defects which donot have significant depth in A relation to the x-ray beam and defect identification A permanent record produced, good for detecting all surface and sub- suface defects and assessing B the through thickness depths of defects C A permanent record produced on site, deffect identification and not so relient on operator skill Mathew.N .Samuel

Page 12 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No. D

QUESTION No controlled areas required on site, A permanent recordd produced and good for assessing the extent of pipe wall thickness reduction due to internal corrosion

Mathew.N .Samuel

Page 13 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No.

QUESTION When ac only is required for welding the powersupply units is almost always;

63 A

A transformer,rectifier and means to change the current

B

A transformer, inverter and means to change the current

C A rectifier, alternator and a means to change the current D

A transformer or alternator and a means to change the current Invertor systems:

64 A

Changes ac to dc at a high frequency

B

Changes dc to ac at a high frequency

C Keep dc constant thus giving better arc stability D

All of the above

A

Which the following defects could be caused through excessive back purge pressure when welding austinitic steel with TIG welding process Root oxidation

B

Root concavity

65

C Root undercut D

All of the above The inclution of an inductance in the welding circuit in MIG/MAG welding

66 A B

Controls the rate ar which the current rises so the end of the electrode is melted uniformally in dip transfer It enables the welder to weld in position wwhen using spray transfer mode

C It allows the arc to be established by lowering the voltage to about 20 volts and currents well above 200 amps D It allows full control over the metal droplet sozes when using full spray Why is aluminum added to steel during the steel making process

67 A

To improve toughness and aid grain refinement

B

To improve deoxidation and aid graian reinement

C To improve strength and ductility D

To improve hardness and ductility Which of the following are advantage in using mechanised arc welding over manual welding

68 A

Better for short run lengths, positional welding and faster welding spped

B

The ability to use higher welding currents, faster welding speed and longer continuos weld length

C Cheaper welding consumables, faster welding speeds and higher deposition rates D

Versatility, less distortion and higher welding currents Which of the following mechanical test can give quantitative measurement of ductility

69 A

Tensile test

B

Charpy vee notch test

C Bend test D

All of the above Which of the following are reasons for applying pre heat

70 A

The removal of residual stresses and the removal of moisture from the joint preparation

B

To avoid slow cooling and to reduce the carbon content

C T reduce the chance of a brittle grain structure and to reduce the chance of hudrogen entrapment D

Increase UTS values and increase weldability Mathew.N .Samuel

Page 14 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No.

QUESTION Which of the following statements are true regarding the charpy test

71 A

It is a static test used to determine a materials notch toughness in the weld region

B

It is a dynamic test used to determine a meterials notch toughness in the weld region

C It is a destructive test to give a measurement of through thickness ductility D

All of the above

A

A tensile test piece had an original gauge length of 63 mm; after testing the gauge length had increased to 73.4mm. What is the percentage of elongation value 16.50%

B

116%

72

C 0.16% D

18.50%

A

What is the UTS value of the tensile specimen if the leased CSA is 37.5mm x 19.35mm and maximum load applied 335 kN 461.7 kN/mm2

B

461.7 N/mm2

73

C 487.7N/mm2 D

487.7Kn/mm2 What are the axis found on a stress strain curve

74 A

Vertical axis strain, horizontal axis stress

B

Vertical axis load, horizontal axis extension

C Vertical axis extension, horizontal axis strain D

Vertical axis extension, horizontal axis stress A bend test that pputs root in compression is classed as

75 A

Face bend test

B

Root bend test

C Side bend test D

None of the above Which of the following are correct dimensions for the vee notch in a charpy specimen

76 A

2.5mm depth,40°included angle,0.25mm root radius

B

2mm depth, 45° included angle, 0.25 mm root radius

C 2 mm depth, 22.5° single angle,0.35 mm root radius D

2.5 mm depth, 22.5 ° included angle,0.20 mm root radius When carrying out a izod test, the test specimen should be positioned so that the notch

77 A

Faces the striker

B

Faces the away from the striker

C Both A and B D

None of the above How many micrometer in 0.1812 mm

78 A

181.2

B

0001812

C 181200 D

1812 Mathew.N .Samuel

Page 15 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No.

QUESTION In a macroscopic examination, which of the following applies

79 A

Viewing 5 x magnificatio ,P400 grade paper finish with an acid etch

B

Viewing 100 x magnification,P 1200 paper finish with an acid etch

C Viewing 100 x magnification,P 400 paper finish with an acid etch D

Viewing 5 x magnificatio , P1200 grade paper finish with an acid etch What paper work is required prior to witnessing of mechanical testing

80 A

Calibration certificate for test pieces

B

Calibration certificate for test equipment

C Test operator qualification D

Test procedurer qualification certficates

A

When considering hydrogen contents for basic electrodes at approximately what temprature is necessary for baking the electrodes to achive scale No pre heat required

B

50°C to 100°C

81

C 400°C to 550°C D 82

250°C to 350°C

When using basic electrodes, to keep the weld metals hydrogen content down to scale C in accordance with BS 5135 The electrodes must be used indoors, can only be used in the down hand position and the use of pre A heat is essantial The electrodes must be used in dry condition but never baked the use of pre heat and used with a B short arc gap The electrodes must be used with a short gap, use of a minimum weave and the electrodes must be C used in a baked condition D The electrodes must be pre baked on dc electrode +ve and with a minimum arc gap

A

Which of the mechanical tests could be used to assess amaterial suscptibility to lamellar tearing Bend test face or root

B

Charpy vee notch test

83

C Through thickness test D

None of the above

A

Which of the following charpy values would you expect from atest carried out on conatructionnal steels 20 to 40 joules

B

50 to 75 jouls

84

C Around 10 to 30 N/mm2 D

Less than 10 jouls which of the following may be used to reduce distortion

85 A

The least amount of deposited weld metal possible with as few weld passes as possible

B

The least amount of deposited weld metal possible with as many weld passes

C Use as faster a welding process as possible with as many weld passes as possible D

Use materials with low thermal conductivity and lower elasticity Which of the following is the most likely to be an essantial variables for a welders

86 A

A change from a electrode to BS 639 E 4332C to a electrode to AWS A5.1 E6010

B

Achange of pipe wall thickness by at leased 12.5mm Mathew.N .Samuel

Page 16 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No.

QUESTION

C A change in pre heat from 50°C to 100°C D

All of the above If the parent material has UTS value of 550N/mm, what would the UTS value be in PSI

87 A

3.795 Psi

B

79.695 Psi

C 79,200 Psi D

3795 Which of the folloewing are applicable to dc electrode -ve when using the MMA welding process

88 A

A broad heat affected zone, a reduction in hardness and narrow deep fast freezing weld pool

B

A narrow heat affected zone,fast freezing weld pool and good penetration properties

C Mechanicallly and metllurgically no different to dc electrode +ve D

A wide shallow weld pool, flat weld profile and low hardness value

A

Which shielding gas would give the best results when welding aluminium with the TIG/TAG welding process Nitrogen

B

Helium

89

C Argon D

Co2

A

When welding rimming steel with autogenous TIG process which of the following problems may occur Porosity

B

Lack of fusion

90

C Tungston inclusion D

Excessive cap reinforcement Why is a fatigue crack purposely induced into a CTOD specimen prior to testing

91 A

So that it is possible too clearly see the initiation point

B

Because it allowes for the attachment of gauges that measure strain

C Because a machined notch by itself is too blunt I order to gain meanigful result D

A fatigue crack is not induced prior to testing What does PQR stand for

92 A

Production Quality control record

B

Production Quality record

C Procedure qualification record D

Procedure quality record Which of the following best describes the elastic limit

93 A

The resistance to fracture under impact loading

B

The maximum stress to which a material can be subjected without permanent deformation

C The amount of stress at which a material will continue to elongate without an increase in force applied D

The ability of a material to stretch and become permanently deformed without breaking or cracking

Mathew.N .Samuel

Page 17 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No.

QUESTION In accordance BS 2901 which of the following is classified as atriple deoxidised filler wire

94 A

A 17 wire

B

A 18 wire

C A 15 wire D

All of the above In BS 639 an electrode classified as E51

95 A

Has an UTS value 51,000 psi, minimum yield strength of 33 N/mm2

B

Has an UTS value 430 to 550 N/mm2, minimum yield strength of 360 N/mm2

C Has an UTS value 510 to 650 N/mm2, minimum yield strength of 360 N/mm2 D

Has an UTS value 510 to 650 N/mm2, minimum yield strength of 330 N/mm2 An E80 electrode would normally be classified in which standard

96 A

BS EN 499

B

BS 639

C AWS A5.5 D

AWS A5.1 What is an active flux

97 A

A material used to clean surfaces of the joint through continued chemical reaction

B

A material used to protect the molten weld pool during welding

C A material used to aid fusion D

All of the above Which of the following are properties of cellulose electrodes

98 A

Viscose slag, large volumes of gas shield aand UTS values above90,000 psi

Large volumes of gas shield, high spatter content and hydrogen contents<15ml per 100g of weld metal deposited Viscose slag, large volumes of gas shield and hydrogen contents in most circumstances >15ml per C 100g of weld metal deposited High spatter content, High deposition rates and hydrogen contents > 15ml per 100g of weld metal D deposited Which of the following could be used as stabilises in austenitic stainless steel B

99

A

Niobium and Nickel

B

Titanium and tungston

C Titanium and niobium D

Tungsten and nickel Basic coated electrodes have which of the following properties

100 A B

High mechanical properties, may be used to produce welds of high deposition rates and are designed to produce welds of low hydrogen content Friable slag highmechanical properties and are desighned to produce welds of low hydrogen content.

C Ease of use, good stop/start properties and high mechanical properties D

High mechanical properties, friable slag and to produce a weld of low carbon content

A

Which is the most likely appearance of lack of root fusion on a radiograph taken of a single vee butt weld A dark straight line with light roor

B

A dark straight line with dark roor

101

Mathew.N .Samuel

Page 18 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No.

QUESTION

C A dark root with straight edges D

A dark uneven straight line with a light root Whaat is weld decay

102 A

Local reduction in chromium of metal under a constant stress at elevated tempratures

B

Slow plastic deformation of metal under a constant stress at elevated temprature

A type of crack which may occure in materials that are in a state of tensile stress and in contact with a C corrosive medium D A type of crack which may occure in the HAZ of the weld of low alloy steels during PWHT which of the following electrodes would you expect to have the highest elongation value

103 A

E51

B

E43

C E80 D

E90 Which of the following is applicable to electrode efficiency

104 A

The mass of metal deposited as a percentage of the mass of core wire melted

B

Iron powder electrodes have efficiences above 100%

C Electrode of high efficiencies tend to produce welds of smooth and flat profiles D

Both A and B

E

All of the above What would be the main effect produced by increasing the kV in radiography

105 A

An increase in sensityvity

B

An increase in definition

C A reduction in density D

A reduction in contrast When considering lamllar tearing, what is a buttering

106 A

A weld run used to increase the size of th throat thickness of the fillet weld

B

A weld run which may be used to take up contraction stress

C A weld run used to increase the UTS value of the parent material D

A weld run used to ensure full penetration of the fillet weld What factors are necessary for stress corrosion cracking to occure

107 A

An aggressive corrosive environment, a carbon content above 0.03% and residual stress

B

An aggressive corrosive environment, tensile stress and material susceptible to cracking

C A temprature above 0.5 of it's melting point,tensile stress and corrosive environment D

Poor through thickness ductility, a corrosive environment and a temprature of 0.5 of the materials melting point Which of the following constituents are added to electrode fluxes to aid arc stability

A

Aluminium oxide, manganese and silicon

B

Calciumcarbonate, potassium silicate and titanium oxide

108

C Thorium,cerium oxide and carbon dioxide D

Aluminium oxide, silicon and manganese Inn MMA welding what parameter is used for the controle of penetration into the base material

109 A

Voltage Mathew.N .Samuel

Page 19 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No. B

QUESTION Welding speed

C Iron powder in the coating D

Current

A

In the welding of a butt joint made from one side , which of the following controls the profile of the root bead Root face

B

Bevel angle

110

C Root gap D

None of the above What type of power source charectristic is required for manual welding

111 A

Constant voltage

B

Flat charectristic

C Drooping charesterstic D

Motor genarator Degreasing components are essential for quality welding but some agents may

112 A

Cause corrosion problems

B

Give off phosgens gas

C Leave residues D

All of the above

A

Which of the following chemical elements has the greater effect on the hardenability of a steel plate Molybdenum

B

Chromium

113

C Titanium D

Carbon Thee weld metal deposit of metal arc electrodes achive its mechanical strength through

114 A

The cor wire

B

The flux coating

C Iron powders with the flux coating In x-ray work the quality of the radiographic negative is assessed by the

115 A

Density of the film

B

IQI indicator

C KVA available D

Stand off distance A steel described as QT will have improved tensile properties because it has

116 A

Had control of chemical composition

B

Been heat treated

C Been quality tested D

Been vacuum melted

A

In the welding of austinitic stainless steels, the electrode and the plate material can be purchased with low carbon contents. The reason for this is to Cracking in the HAZ

117

Mathew.N .Samuel

Page 20 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No. B

QUESTION The formation of chromium carbides

C Cracking in the weld metal D

Distortion

A

In a steel which has improved creep properties at elevated temprature, which one of the following elements helps in this improvement Tungston inclusion

B

Manganese

118

C Molybdenum D

Carbon Welding a steel plate of a CE of 0.45 would require preheating to

119 A

Prevent the formation of sulphides

B

Prevent hardening in the HAZ

C Prevent the formation of carbides D

To improve mechanical properties in the weld

A

Welding procedures may require welds to be deposited at a controlled rate heat input .High heat in puts would Have poor profile

B

Have larger grain size

120

C Have high hardness in the HAZ D

Have low elongation properties In a tensile test , a brittle material would be indicated if the fracture surface

121 A

Show a reduction in size

B

Is flat and featureless

C Breakes in the weld metal D

breaks in the parent material

A

What destructive test would be required to ascertain the liklihood of cracking in the HAZ of a weld Nick break

B

Side bend test

122

C Charpy impact D

Macro test Which type of submerged arc welding flux is more resistant to moisture

123 A

Fused

B

Agglomerated

C Basic D

All of the above Preheating for arc welding applies to

124 A

Assembly welding only

B

Assembly and tack welding

C Joints over 25 mm thick only D 125

Cruciform welds only Submerged arc welding is used to make butt welds which is the most critical parameter with respect to the weld preparation Mathew.N .Samuel

Page 21 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No.

QUESTION

A

Root gap

B

Angle

C Root face D

Gas cut finish The presence of iron sulphide in weld metal is associated with

126 A

A solidification cracking

B

Hydrogen cracking

C Intergranular corrosion D

Stress corrosion A metallurgical problem most associated with arc welding is

127 A

Hydrogen cracking in the heat affected zone

B

Solidification cracks in weldmetal

C Hydrogen cracking in the weld metal D

Lamellar tearing in the weld metal In submerged arc welding, excessive arc voltage may cause

128 A

Excessive penetration

B

Change in weld metal composition

C Narrow weld width D

Excessive weld bead height A large grain structure in steels is said to produce

129 A

Low ductility value

B

Low fracure toughness value

C High fracure toughness value D

High tensile strength The liklehood of brittle fracture in steel increase with

130 A

A large grain formation

B

A reduction of in service temparature to sub zero levels

C Ferritic rather than austenitic steel D

All of the above Lamellar tearing has occurred in a steel fabrication before welding could it have been found by

131 A

X-ray examination

B

Dye penetrant test

C Ultrsonic inspection D

It would not have been found by any inspection method

A

Austenitic stainless steel electrodes and plate with loww carbon contents are used to minimise the risk of Cracking in the HAZ

B

The formation of chromium carbides

132

C Cracking the weld metal D 133

Distortion Improper flame cut preparations may, during welding increase the liklihood of Mathew.N .Samuel

Page 22 of 46

MULTIPLE CHOICE QUESTION & ANSWER WELDING - CSWIP-3.1 Q.No.

QUESTION

A

Cracking

B

Misalignment problems

C Inclusions D

All of the above Cracks in welds may be due to

134 A

Solidification problems

B

Hydrogen problems

C Excessive stresses D

All of the above Hydrogen cracking in the weld metal is more likely when welding

135 A

Carbon manganese steel

B

Stainless steel

C Micro alloyed steel D

Low carbon steels In flame cutting , oxy pressure and nozzle size would influence

136 A

The temprature required for cut initiation

B

The ablity to cut stainless steels

C The depth of cut obtainable D

None of the above Pre heating a carbon steel before welding is carried out to minimise the risk of

137 A

Scattered porosity

B

Excessive destortion

C Parent metal cracking D

Lack of pentration

Mathew.N .Samuel

Page 23 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 24 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 25 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 26 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 27 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 28 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 29 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 30 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 31 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 32 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 33 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 34 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 35 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 36 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 37 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 38 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 39 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 40 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 41 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 42 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 43 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

Page 44 of 46

CHOICE QUESTION & ANSWER Answer

Mathew.N .Samuel

45 of 46

ANSWER SHEET FOR WELDING INSPECTOR Q.No. Answer Q.No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

A,B B C B C C D C D B B D C C D C C C D D B D B A D B C C A C C D C D B C A A D A C A A

44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86

Answer B D B C A D C B D A D B C A A B C D C D B B A B B A C B A B A A B A D A B D C C A A B

Q.No. 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130

Answer B C A C C B C C C D C C A A A B E C B B B D C C D D B B B B C B B B D A B A A B B B D

file:///var/www/apps/conversion/tmp/scratch_2/259461050.xls

Q.No. 132 133 134 135 136 137

Answer B D D C C C

Mathew .N.Samuel

ANSWER SHEET FOR WELDING INSPECTOR Q.No. Answer Q.No. 87

Answer B

Q.No. 131

Answer

Q.No.

46 of 46

Answer

D

file:///var/www/apps/conversion/tmp/scratch_2/259461050.xls

Mathew .N.Samuel