CWB LEVEL 2 CLOSED BOOK STUDY GUIDE | QUESTIONS AND
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | LATEST
UPDATE
To measure the strength of a welded joint what mechanical test would you
prescribe?
a) A transverse weld tension test.
b) A charpy test.
c) A CTOD test.
d) An all weld metal tension test.
e) A side bend test. - CORRECT ANSWER - a) A transverse weld tension test.
Select the cutting process that would provide the narrowest heat affected zone
when cutting 12.5 mm (0.5 in) thick carbon steel.
a) Oxy-acetylene cutting.
b) Air-carbon arc cutting.
c) Oxy-propane cutting.
d) Plasma arc cutting.
e) Laser beam cutting - CORRECT ANSWER - e) Laser beam cutting
Which of the following refers to a welder test where a pipe assembly is placed
vertically and the joint welded in the horizontal position without rotating the
assembly?
a) 1G
b) 2G
,c) 3G
d) 5G
e) 6G - CORRECT ANSWER - b) 2G
Which of the following imperfections is normally considered as unacceptable
regardless of size or location?
a) Porosity.
b) Crack.
c) Inadequate penetration.
d) Lamination.
e) Burn-through. - CORRECT ANSWER - b) Crack.
Select the correct penetrameter thickness for 2% sensitivity when radiographing
a weldment 1.25 inches in thickness.
a) 0.012 in.
b) 0.015 in.
c) 0.025 in.
d) 0.030 in. - CORRECT ANSWER - c) 0.025 in.
Which of the following statements concerning porosity is true?
a) Porosity cannot be trapped within a weld.
b) Porosity moves up through later passes and will show only in a final pass.
c) Porosity is restricted to the centre line of a weld.
d) Porosity can result from faulty welder technique.
,e) Porosity can be dissipated by an appropriate heat treatment. - CORRECT
ANSWER - d) Porosity can result from faulty welder technique.
An irregular, dense white spot is seen on the radiograph of a weld. Assuming it
was caused by the welding process used, which one of the processes below
would be responsible?
a) SMAW process.
b) GTAW process.
c) GMAW process.
d) ST process.
e) ESW process. - CORRECT ANSWER - b) GTAW process.
Which of the following operations is known to result in the emission of ionizing
radiation at levels dangerous to human health?
a) Shielded metal arc welding.
b) Plasma arc welding.
c) Operation of high voltage portable generator sets.
d) Radiographic inspection.
e) Electroslag and electrogas welding. - CORRECT ANSWER - d)
Radiographic inspection.
The ultrasonic transducer is pressed against the plate of a welded joint. The
sound travels longitudinally through the plate to the opposite side. The signal
seen on the UT screen that comes from this opposite side of the plate:
a) Is the initial pulse signal.
b) Is the back reflection signal.
c) Is the front reflection signal.
, d) Must be equal in amplitude to any defect signal.
e) Cannot be used for establishing the thickness of the material under test. -
CORRECT ANSWER - b) Is the back reflection signal.
Which of the following is a stainless steel electrode?
a) E4918-1
b) E4918-A1
c) E4818
d) E308-16
e) E4111 - CORRECT ANSWER - d) E308-16
Reverse polarity refers to the use of a:
a) AC power source, electrode +
b) DC power source, electrode +
c) AC power source, electrode -
d) DC power source, electrode - - CORRECT ANSWER - b) DC power
source, electrode +
Which welding process(es) can result in metallic inclusions in the weld?
a) SMAW.
b) FCAW.
c) GMAW.
d) GTAW.
e) SAW - CORRECT ANSWER - d) GTAW.
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | LATEST
UPDATE
To measure the strength of a welded joint what mechanical test would you
prescribe?
a) A transverse weld tension test.
b) A charpy test.
c) A CTOD test.
d) An all weld metal tension test.
e) A side bend test. - CORRECT ANSWER - a) A transverse weld tension test.
Select the cutting process that would provide the narrowest heat affected zone
when cutting 12.5 mm (0.5 in) thick carbon steel.
a) Oxy-acetylene cutting.
b) Air-carbon arc cutting.
c) Oxy-propane cutting.
d) Plasma arc cutting.
e) Laser beam cutting - CORRECT ANSWER - e) Laser beam cutting
Which of the following refers to a welder test where a pipe assembly is placed
vertically and the joint welded in the horizontal position without rotating the
assembly?
a) 1G
b) 2G
,c) 3G
d) 5G
e) 6G - CORRECT ANSWER - b) 2G
Which of the following imperfections is normally considered as unacceptable
regardless of size or location?
a) Porosity.
b) Crack.
c) Inadequate penetration.
d) Lamination.
e) Burn-through. - CORRECT ANSWER - b) Crack.
Select the correct penetrameter thickness for 2% sensitivity when radiographing
a weldment 1.25 inches in thickness.
a) 0.012 in.
b) 0.015 in.
c) 0.025 in.
d) 0.030 in. - CORRECT ANSWER - c) 0.025 in.
Which of the following statements concerning porosity is true?
a) Porosity cannot be trapped within a weld.
b) Porosity moves up through later passes and will show only in a final pass.
c) Porosity is restricted to the centre line of a weld.
d) Porosity can result from faulty welder technique.
,e) Porosity can be dissipated by an appropriate heat treatment. - CORRECT
ANSWER - d) Porosity can result from faulty welder technique.
An irregular, dense white spot is seen on the radiograph of a weld. Assuming it
was caused by the welding process used, which one of the processes below
would be responsible?
a) SMAW process.
b) GTAW process.
c) GMAW process.
d) ST process.
e) ESW process. - CORRECT ANSWER - b) GTAW process.
Which of the following operations is known to result in the emission of ionizing
radiation at levels dangerous to human health?
a) Shielded metal arc welding.
b) Plasma arc welding.
c) Operation of high voltage portable generator sets.
d) Radiographic inspection.
e) Electroslag and electrogas welding. - CORRECT ANSWER - d)
Radiographic inspection.
The ultrasonic transducer is pressed against the plate of a welded joint. The
sound travels longitudinally through the plate to the opposite side. The signal
seen on the UT screen that comes from this opposite side of the plate:
a) Is the initial pulse signal.
b) Is the back reflection signal.
c) Is the front reflection signal.
, d) Must be equal in amplitude to any defect signal.
e) Cannot be used for establishing the thickness of the material under test. -
CORRECT ANSWER - b) Is the back reflection signal.
Which of the following is a stainless steel electrode?
a) E4918-1
b) E4918-A1
c) E4818
d) E308-16
e) E4111 - CORRECT ANSWER - d) E308-16
Reverse polarity refers to the use of a:
a) AC power source, electrode +
b) DC power source, electrode +
c) AC power source, electrode -
d) DC power source, electrode - - CORRECT ANSWER - b) DC power
source, electrode +
Which welding process(es) can result in metallic inclusions in the weld?
a) SMAW.
b) FCAW.
c) GMAW.
d) GTAW.
e) SAW - CORRECT ANSWER - d) GTAW.
