CSWIP 3.1 PART 2

39 Questions I 24 Attempts I Created By emad_rio 301 days ago

Multi choice question -welding inspector ,steel

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Question Excerpt From CSWIP 3.1 PART 2

Q.1)	Degreasing components are essential for quality welding. When welded some agent may:

A.	Cause corrosion problems

B.	Leave residues

C.	Give off toxic gases

D.	All of the above.

Q.2)	Cellulose electrodes are often used for the deposition of a root pass on pipes welded in the field. This is because?

A.	Hydrogen control is required

B.	The high deposition rate due to the iron powder content

C.	The hydrogen gas produced in the flux increases the arc voltage

D.	All of the above

Q.3)	In the welded austenitic stainless steel .the electrode and the plate materials are often specified to be low carbon content .the reason for this is:

A.	To prevent formation of crack in the HAZ

B.	To prevent formation of chromium carbides

C.	To prevent cracking in the weld

D.	Minimize distortion

Q.4)	With regards to welding procedure, an essential variable may:

A.	Change the properties of the weld

B.	Influence the visual acceptance

C.	Require re-approval of a weld procedure

D.	All of the above

Q.5)	Which of the following NDT methods can only detect surface breaking defects?

MPI

DPI

E.	Both a and b

Q.6)	Which of following defects would show up as light indications on a radiograph?

A.	Slag inclusion and copper inclusion

B.	Tungsten inclusions and excessive root penetration

C.	Cap undercut and root piping

D.	Excessive cap height and incomplete root penetration

Q.7)	which of following additions may be added to an electrodes flux to act as a stabilizer?

A.	Sodium silicate

Silicon

Manganese

D.	Titanium dioxide.

Q.8)	Lamellar tearing is best prevented by:

A.	The use of plate materials containing low level of impurities

B.	The use of buttering runs

C.	Post welds stress relief

D.	Both A and B

Q.9)	When considering radiography using X-ray, which of the following techniques is most likely to be used for pipe-to-pipe weld (circumferential seam), 610mm diameter with no internal access?

SWSI

DWSI

DWDI

D.	SWSI-panoramic

Q.10)	A balanced welding technique for example back step welding is most often used for:

A.	Controlling lamellar tearing

B.	Increasing weld toughness

C.	Reducing weld zone hardness

D.	Reducing distortion

Q.11)	Basic coated electrodes have which of following properties.

A.	High mechanical properties may be used to produce welds of high deposition rates and to produce welds of low hydrogen content

B.	Friable slag, high mechanical strength, and to produce welds of a low hydrogen content

C.	Low hydrogen content welds, good stop/start properties and strength

D.	Low carbon content welds, friable slag and high strength

Q.12)	On a radiograph, the most likely appearance of lack of root fusion on single – V butt weld is:

A.	A dark straight line with a light root

B.	A dark root with straight edges

C.	A dark uneven line following the edge of the root

D.	None of the above lack of root fusion can not be seen on a radiograph

Q.13)	Which of the following applies to heat treatment process of tempering:

A.	It is always carried out at a temperature above upper critical limit

B.	It is carried out to increase the strength and toughness of weldments

C.	Tempering is generally carried out before quench hardening

D.	None of the above

Q.14)	Which of the following is applicable to a plate lamination:

A.	They are best detected by radiography

B.	They are mainly caused by hydrogen entrapment

C.	They originate in the parent material

D.	They are caused when welding stresses act parallel with the rolled direction of the parent plate

Q.15)	Which of the following NDT method would be the least effective on an austenitic stainless steel butt weld?

DPI

MPI

Q.16)	The hardest part of a multi-pass welded joint, assuming no post weld heat treatment has have taken place is:

A.	The HAZ of the cap

B.	The HAZ of the root

The root

The cap

Q.17)	is it permissible to allow a multi-pass butt weld to cool down between weld passes?

A.	It should be up to the welding inspector

B.	No the weld must be kept hot at all times

C.	It depends on the welder

D.	It depends on the specification requirements

Q.18)	The usual method of assessing the sensitivity and density of a radiograph is means of:

A.	Densitometer and dosimeter

B.	Penetrometer and a densitometer

C.	IQI and a dosimeter

D.	IQI and a fluxmeter

Q.19)	In the submerged arc welding process, the use of excessive high voltages would result in?

A.	Insufficient flux melting

B.	Excessive flux melting

C.	Slag removal difficulties

D.	Excessive spatter

Q.20)	Welding a steel plate with a CE of 0.45 would require prehearing to ?

A.	Prevent the formation of sulphides

B.	Prevent hardening in the HAZ

C.	Prevent the formation of carbides

D.	To reduce the amount of current required

Q.21)	Which of the following process used resistive heating system to achieve weld metal deposition?

MMA

B.	Resistant spot welding

C.	Electrode slag

D.	Friction welding

Q.22)	What does the 70 represent on an E70 10 AWS 5.1 classified electrode?

A.	70 N/mm 2 minimume UTS

B.	70 joules minimum impact strength

C.	70.000 P.S.I minimum yield strength

D.	70.000 PSI minimum UTS

Q.23)	Hot cracking in the steel weldments occurs:

A.	Along the fusion line.

B.	In the last metal to solidify

C.	Weld centerline.

D.	In areas of the lowest dilution

Q.24)	Cellulose electrodes have which of the following properties?

A.	Viscous slag. Large volumes of shielding gas and UTS values above 90.000 PSI

B.	Large volumes of shielding gas, high spatter contents and hydrogen levels < 15 mi per 100g of the weld metal deposited

C.	Large volumes of shielding gas, hydrogen contents >15mi per 100g of weld metal deposited and should be never baked

D.	High spatter contents, high deposition and large volumes of gas shield

Q.25)	From the following electrode coding in BS 499, E50 3 1Ni B 2 1 H5, What does the 3 represent?

A.	A minimum charpy value of a 30 joules

B.	A minimum impact value of a 47 joules

C.	A minimum impact temperature of -30 °c at given joule value

D.	None of the above

Q.26)	which of fallowing applicable to efficiency?

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

B.	Iron powder electrodes have efficiencies above 100%

C.	Electrodes have efficiencies tend to produce welds of a smooth flat profile

D.	All of above

Q.27)	A fatigue cracks fracture surface is:

A.	Rough randomly torn

Smooth

C.	Step like appearance

D.	Bright crystalline

Q.28)	E6013 electrode would most probably used for welding:

A.	Low-pressure pipework

B.	High-pressure pipework

C.	Vertical down welding on storage tanks

D.	In a situation where low hydrogen welds are specified

Q.29)	Which element in steel if present in significant amounts may lead to hot shortness?

A.	Phosphorus

Manganese

Silicon

Sulphur

Q.30)	Which of the following welding processes are commonly used for the Aluminum.

A.	MIG and TIG

B.	MAG and TIG

C.	MMA and TIG

D.	MMA and MIG

E.	Both A and B

Q.31)	Which of the following materials would be the most difficult material to carry out UT.

A.	Fine grained material such as micro alloyed

B.	A large coarse-grained casting

C.	Duplex stainless steel .45% maximum ferrite content

D.	Pipe grade material such as API 5L X65

E.	Bothe B and C

Q.32)	Lamellar tearing is must likely to occur in which of the following conditions.

A.	Single V butt weld made in tubular steel with low through thickness ductility

B.	Full penetration fabrication Tee butt joint in steel with low through thickness ductility

C.	Full penetration fabrication cruciform, Z classified material

D.	All SAW welded joints are susceptible

E.	Both B and C

Q.33)	Radiography is most suited to the detection of:

A.	Volumetric flaws

B.	All planar flaws

C.	Both A and B

D.	Laminations in rolled plate materials

Q.34)	A good example of volumetric flaws:

A.	Slag inclusion

B.	Root piping

C.	Blow holes

D.	All of the above

Q.35)	Which of following isotopes may be used foe a 25mm thick steel pipe to pipe weld DWSI (in according with EN 1435).

Ir 192

Co 60

Se 75

Yb 169

E.	Both A and c

Q.36)	increasing carbon content of a steel will:

A.	Increase the hardness and toughness

B.	Decrease the hardness and toughness

C.	Increase hardness, Decrease toughness

D.	Decrease hardness, Increase toughness

Q.37)	Which of following can be used to reduce the chances of solidification cracking.

A.	The use of a non-fluxed welding process and better quality materials

B.	The use of better quality materials and the highest heat input process

C.	The use of a low dilution process and wider joint preparation

D.	The addition over 1.8% Mn and a low hydrogen welding process

E.	All of the above

Q.38)	which phase transform to martensite upon rapid cooling?

Ferrite

Austenite

Perlite

Cementite

Q.39)	Which of following is the most likely to be considered an essential variable for a welder qualification test?

A.	A change from an electrode classified to BS EN 499 as an E46 INI B to an electrode classified AWS A5.1 as an E7018

B.	A change of pipe wall thickness by at least 15 mm

C.	A change in pre-heat temperature from 50c to 100c

D.	All of the above.

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