CWB 1 EXAM WITH COMPLETE
QUESTIONS AND 100% CORRECT
ANSWERS { GRADED A+}
1. Which is not a recommended method for surface cleaning of a part for
liquid penetrant examination?
a) Cleaning with organic solvents.
b) Blasting with shot or dull sand.
c) Cleaning with de-greasers.
d) Use of de-scaling solutions.
e) Ultrasonic cleaning methods. - ✔✔b) Blasting with shot or dull sand.
2. Which of the following weld defects is most likely to be missed by
radiography in a weld:
,a) Undercutting.
b) Porosity.
c) Slag inclusions.
d) Cracking.
e) Burn through . - ✔✔d) Cracking.
3. In the choices given below, metallographic tests would be the least
informative with regard to the:
a) Presence of the non-metallic inclusions.
b) Grain structure in the weld and fusion zone.
c) Ability of the material to withstand repeated fluctuating loads.
d) Extent and structure of the heat affected zone.
e) Number of weld passes. - ✔✔c) Ability of the material to withstand
repeated fluctuating loads.
,4. In producing a drawing for a scale of 1:50, what would be the distance
represented by a distance on
the drawing of 6 em?
a) 12 cm.
b) 30 cm.
c) 50 cm.
d) 240 cm.
e) 300 cm. - ✔✔e) 300 cm.
5. The mechanical test used to determine the ability of a material to
resist failure by brittle fracture
requires the use of:
a) A tensile test specimen.
b) A bend test specimen.
c) A compression test specimen.
, d) An impact test specimen.
e) A spectrographic test. - ✔✔d) An impact test specimen.
6. The cooling rate of aT-joint is:
a) Less than that in a butt joint.
b) Greater than that in a butt joint.
c) Greater than that in a butt joint only where the carbon equivalent is
high .
d) Greater at the mid-section than at the start.
e) Greater at the mid-section than at the finish. - ✔✔b) Greater than
that in a butt joint.
7. What are slag and non-metallic inclusions usually caused by?
a) Moisture in the weld joint.
b) High welding current.
c) Loss of shielding gas.
QUESTIONS AND 100% CORRECT
ANSWERS { GRADED A+}
1. Which is not a recommended method for surface cleaning of a part for
liquid penetrant examination?
a) Cleaning with organic solvents.
b) Blasting with shot or dull sand.
c) Cleaning with de-greasers.
d) Use of de-scaling solutions.
e) Ultrasonic cleaning methods. - ✔✔b) Blasting with shot or dull sand.
2. Which of the following weld defects is most likely to be missed by
radiography in a weld:
,a) Undercutting.
b) Porosity.
c) Slag inclusions.
d) Cracking.
e) Burn through . - ✔✔d) Cracking.
3. In the choices given below, metallographic tests would be the least
informative with regard to the:
a) Presence of the non-metallic inclusions.
b) Grain structure in the weld and fusion zone.
c) Ability of the material to withstand repeated fluctuating loads.
d) Extent and structure of the heat affected zone.
e) Number of weld passes. - ✔✔c) Ability of the material to withstand
repeated fluctuating loads.
,4. In producing a drawing for a scale of 1:50, what would be the distance
represented by a distance on
the drawing of 6 em?
a) 12 cm.
b) 30 cm.
c) 50 cm.
d) 240 cm.
e) 300 cm. - ✔✔e) 300 cm.
5. The mechanical test used to determine the ability of a material to
resist failure by brittle fracture
requires the use of:
a) A tensile test specimen.
b) A bend test specimen.
c) A compression test specimen.
, d) An impact test specimen.
e) A spectrographic test. - ✔✔d) An impact test specimen.
6. The cooling rate of aT-joint is:
a) Less than that in a butt joint.
b) Greater than that in a butt joint.
c) Greater than that in a butt joint only where the carbon equivalent is
high .
d) Greater at the mid-section than at the start.
e) Greater at the mid-section than at the finish. - ✔✔b) Greater than
that in a butt joint.
7. What are slag and non-metallic inclusions usually caused by?
a) Moisture in the weld joint.
b) High welding current.
c) Loss of shielding gas.
