CSWIP 3.1 QUESTIONS MODEL 2

21        What is the maximum hardness usually recommended for the HAZ of a medium strength ferritic steel weld?

a)                  100 DP Hv

b)                  350 DP HV

c)                  500 DP Hv

d)                 750 DP Hv

22        What effect to midthickess lamination in steel plate normally has when they are located within a weld HAZ?

           

a)                  Cause lamellar tearing

b)                  Fuse together to form a bond

c)                  Affect the weld metal composition

d)                 Cause internal tearing on a micro-scale

23        When hydrogen control is specified for a manual metal arc-welding project the electrode would normally be:

a)                  Cellulosic

b)                  Iron oxide

c)                  Acid

d)                 Basic

24        You would with certainty recognize a hydrogen controlled flux covered electrode from it’s:

a)                  Color

b)                  Length

c)                  Trade name

d)                 AWS/BS639 Code Letter

25        When manual metal arc welding is being carried out on an open construction site, which groups of welder are most likely to require continuous monitoring?

a)                  Concrete shuttering welding team

b)                  Pipe welders

c)                  Platter welders

d)                 Plant maintenance welders

26        You noticed manual metal arc welding electrodes, stripe of flux, are being used as filler wire, for TIG welding. You would object because:

a)                  It is too expensive

b)                  The wire would be too thick

c)                  The weld metal composition may be wrong

d)                 The wire is too short

27        When open site working, serious porosity in manual metal arc welding is brought to your attention. What would you investigate?

a)                  Electrode type

b)                  Power plant type

c)                  Electrode storage

d)                 Day temperature

28        The steel composition in structural contract is changed form 0.15% carbon, 0.6% manganese, to 0.2% carbon, 1.2% manganese. Might this influence the incidence of:

a)                  Porosity

b)                  Cracking in the weld area

c)                  Under cut for fillet welds

d)                 Lack of root fusion defects

29        One of the following alloys is non-magnetic, Which?

a)                  4.0% Chromium molybdenum

b)                  12.0% Chromium

c)                  Austenitic Stainless Steel

d)                 9.0% Nickel Steel

30        When the TIG welding Austenitic Stainless Steel pipe. Argon gas backing is called for. This is to:

a)                  Prevent oxidation

b)                  Prevent under bead cracking

c)                  Prevent porosity

d)                 Control the penetration bead shape

31        Pre-heating a carbon steel manual metal arc welding is carried out to minimize the risk of

a)                  Scattered porosity

b)                  Worm hole porosity

c)                  Parent metal cracking

d)                 Lack of penetration

32        IN UK practice, BS 499 Part2 specifies that the drawing dimension quoted for a fillet weld is the:

a)                  Leg length

b)                  Actual throat thickness

c)                  Weld width

33        For open site manual metal arc welding the following equipment is available. Which would you choose for safe working?

a)                  Single operator transformer

b)                  Multi operator transformers

c)                  AC/DC composite power unit

d)                 Diesel engine driven motor generator

34        If submerged welding to be used to make butt welds, which would you be most critical of:

           

a)                  The root gap tolerance

b)                  The angle of penetration

c)                  The root face width

d)                 The gas cut finish

35        During CO-2 welding, the arc length is most likely to be affected by:

a)                  The wire diameter

b)                  The current return connections

c)                  The gas flow rate

d)                 The torch to work angle

36        Pre heating for arc welding applies to:

a)                  Assembly welding only

b)                  Assembly and tack welding

c)                  Joint over 25 mm thick only

d)                 Cruciform welds only

36        You see a welder using oxy-acetylene flame with along feathered inner cone. What would be the effect of this on carbon steel?

a)                  The weld could be hard and brittle

b)                  The weld metal could be too soft

c)                  There will be no effect on the weld

d)                 The weld have under cut

37        A welder qualification test is o verify:

a)                  The skill of the welder

b)                  The quality of the materials

c)                  The non-destructive procedures

d)                 The manufacturing methods

38        A fabricating procedure calls for fillet welds to be blended in by grinding. This is to influence:

a)                  HAZ cracking

b)                  Fatigue life

c)                  Residual stresses

d)                 Yield strength

39        Bend test specimens have been taken from a 25 mm thick carbon steel butt weld.  Which   would   show   lack   of   inter-run  fusion:

a)                  Side bend

b)                  Root bend

c)                  Face bend

d)                 Guided bend

40        Lamellar tearing has been occurred in steel fabrication. BEFORE welding could  it  have  been  found  by:

a)                  X-ray examination

b)                  Dye penetrant

c)                  Ultrasonic inspection

d)                 It would not have been found by any inspection method