CWB 1 Exam Questions with Complete
Solutions36
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. - ANSWERS-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 . - ANSWERS-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. - ANSWERS-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. - ANSWERS-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. - ANSWERS-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. - ANSWERS-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.
d) Inadequate interpass cleaning. - ANSWERS-d) Inadequate interpass cleaning.
8. Where deviations from the drawings are warranted the inspector should do which of the
following?
a) Authorize approval of the changes.
b) Obtain official approval for the changes.
c) Reject the work without any further consideration.
d) Stop the work until drawing revisions have been completed. - ANSWERS-b) Obtain official
approval for the changes.
9. With the appropriate electrode, which of the following welding processes can operate with or
without
a shielding gas:
a) Electrogas welding process.
b) Gas metal arc welding process.
c) Flux cored arc welding process.
d) Submerged arc welding process.
e) Pulsed gas metal arc welding process. - ANSWERS-c) Flux cored arc welding process.
10. If there is inadequate penetration at the root of a double vee groove, which of the following
statements best defines the reason for this:
a) Groove angle exceeds specified amount.
b) Root opening too large.
c) Groove depth too large causing melt through on the second side
, d) Groove angle is too small.
e) Excessive plate thickness. - ANSWERS-d) Groove angle is too small
11. The continuous method of magnetic particle inspection means:
a) Carrying out all the steps in the process without pause.
b) Using DC current.
c) Applying magnetic particles to the weld while the current is flowing in the yoke.
d) Applying magnetic particle to the test surface while current flows from one leg of the yoke
through the material to the other leg of the yoke.
e) Precautions must be taken to prevent over-magnetization of the material. - ANSWERS-c)
Applying magnetic particles to the weld while the current is flowing in the yoke.
12. From the welding problems identified below which one of the five does not fit the pattern
established
by the other four?
a) Insufficient throat.
b) Incorrect bevel angle.
c) Loss of shielding gas.
d) Improper fit up.
e) Use of wrong consumable. - ANSWERS-a) Insufficient throat.
13. A 10 mm fillet weld has a nominal:
a) Throat dimension of 10 mm.
b) Area of 10 sq. mm.
c) Leg size of 1 0 mm.
d) Face width of 10 mm. - ANSWERS-c) Leg size of 1 0 mm.
Solutions36
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. - ANSWERS-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 . - ANSWERS-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. - ANSWERS-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. - ANSWERS-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. - ANSWERS-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. - ANSWERS-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.
d) Inadequate interpass cleaning. - ANSWERS-d) Inadequate interpass cleaning.
8. Where deviations from the drawings are warranted the inspector should do which of the
following?
a) Authorize approval of the changes.
b) Obtain official approval for the changes.
c) Reject the work without any further consideration.
d) Stop the work until drawing revisions have been completed. - ANSWERS-b) Obtain official
approval for the changes.
9. With the appropriate electrode, which of the following welding processes can operate with or
without
a shielding gas:
a) Electrogas welding process.
b) Gas metal arc welding process.
c) Flux cored arc welding process.
d) Submerged arc welding process.
e) Pulsed gas metal arc welding process. - ANSWERS-c) Flux cored arc welding process.
10. If there is inadequate penetration at the root of a double vee groove, which of the following
statements best defines the reason for this:
a) Groove angle exceeds specified amount.
b) Root opening too large.
c) Groove depth too large causing melt through on the second side
, d) Groove angle is too small.
e) Excessive plate thickness. - ANSWERS-d) Groove angle is too small
11. The continuous method of magnetic particle inspection means:
a) Carrying out all the steps in the process without pause.
b) Using DC current.
c) Applying magnetic particles to the weld while the current is flowing in the yoke.
d) Applying magnetic particle to the test surface while current flows from one leg of the yoke
through the material to the other leg of the yoke.
e) Precautions must be taken to prevent over-magnetization of the material. - ANSWERS-c)
Applying magnetic particles to the weld while the current is flowing in the yoke.
12. From the welding problems identified below which one of the five does not fit the pattern
established
by the other four?
a) Insufficient throat.
b) Incorrect bevel angle.
c) Loss of shielding gas.
d) Improper fit up.
e) Use of wrong consumable. - ANSWERS-a) Insufficient throat.
13. A 10 mm fillet weld has a nominal:
a) Throat dimension of 10 mm.
b) Area of 10 sq. mm.
c) Leg size of 1 0 mm.
d) Face width of 10 mm. - ANSWERS-c) Leg size of 1 0 mm.
