1. Stress relieving is not helpful in which of the following cases?
Softening the steel
Lowering the peak residual stress
Improving resistance to stress corrosion cracking
Improving dimensional stability after machining
2. Stray arcing may be regarded as a serious defect because:
It may reduce the thickness dimension of a component
It may cause liquation cracks
It may cause hard zones
All the above
3. Slag inclusions would occur with:
Shielded metal arc welding
Metal inert gas welding
Undercut and underfill
Lack of Penetration
4. Stress relieving is not helpful in which of the following cases?
In improving resistance to stress corrosion
In lowering the peak residual stresses
In softening the metal
In improving dimensional stability after machining
5. What is the ratio between the leg length and the design throat thickness on a mitre fillet weld with equal leg lengths?
1 to1
2 to 1
1.414 to 1
All of the above
6. The most serious type of defect (s) is (are);
Lack of penetration
Cracks
Lack of fusion
All the above
7. When ‘hydrogen control’ is specified for a Shielded metal arc welding project, the electrode would normally be;
Cellulosic
Iron oxide
Acid
Basic
8. When manual metal arc welding is being carried out on an open construction site, which group of welders are most likely to require continuous monitoring?
Concrete shuttering welding teams
Pipe welding teams
Expert riggers and foremen
Operation In-Charge
9. A low hydrogen electrode, according to BS 639, would contain:
No hydrogen.
Less than 15 ml of hydrogen per 100 grams of deposited weld metal
Less than 15 ml of hydrogen per 1000 grams of deposited weld metal
More than 15 ml of hydrogen per 100 grams of deposited weld metal
10. Two low carbon steel pipes, 150mm diameter and 6mm wall thickness, are to be butt-welded using the TIG process. To ensure a full-strength joint, which of the following preps is most suitable?
Open single bevel
Open single V
Open square preparation
All of the above
11. Macroscopic examination requires any specimen to be inspected:
Once, after etching
Twice, before and after etching
No need to inspect before etching
None of the above
12. In a fatigue failure the appearance of the fracture surface is characteristic. It would be;
Rough and torn
‘Chevron’-like
Smooth
None of the above
13. Toe blending is important as it may affect;
Corrosion
Fatigue life
Overlap type defects
All the above
14. Undercut is normally assessed by;
Its depth
Its length
It’s blending
All the above
15. Welds made with high heat inputs show a reduction in which of the following properties?
Ductility
Toughness
Fatigue strength
Mechanical strength
16. If pipe bores are not matched correctly it can result in:
Lack of root penetration
The incorrect flow of water
Excessive undercut
High preheating during welding
17. In Shielded metal arc welding of low carbon steel, which electrode flux will yield the greatest degree of penetration?
Iron powder
Rutile
Cellulosic
Low hydrogen
18. The most common type of defect found in a structure that is in operation for a longer period of time;
Fatigue cracking
Crystallization
Cold Cracking
Stress gradient
19. The weld dimension used to indicate the minimum strength of a fillet weld is:
Leg length
Throat thickness
Width of bead
Length of weld element
20. You would certainly recognize a hydrogen controlled flux covered electrode from its:
Colour
Length
Trade name
BS639/AWS code letter
21. Basic coated electrodes possess which of the following properties;
High mechanical properties may be used to produce welds of high deposition rates and to produce welds of low hydrogen content
Low hydrogen content welds, good stop/start properties and high strength
Low carbon content welds, friable slag and high strength
All of the above
22. Which is the hardest part of a multi-pass welded joint, considering no post weld heat treatment has been done?
The HAZ of the cap
The HAZ of the root
The root
The root, and cap
23. Which of the following is applicable to a plate lamination?
They originate in the parent material
They are mainly caused by hydrogen entrapment
Both 1 & 2
None of the above
24. A black triangular flag used in conjunction with a weld symbol as to en 22553 means:
Be cautious while welding
Only E 7018 to be used
Welding to be carried out on-site (field weld)
All of the above
25. Which of the following is likely to be considered an essential variable in a welding procedure?
A change in welding position from Vertical to Overhead
A change from an electrode classified to AWS E 6012 to an electrode E 7018
A change in preheat temp from 1100 C to 1650 C
All of the above
26. Which of the following flame types would you expect to be used for the cutting of mild steel?
Neutral flame
Carburizing flame
Oxidizing flame
None of the above
27. Which of the following is used for a crater crack?
Tearing
Fatigue crack
Star crack
Lap
28. Cold lapping is another term for:
Lack of fusion at the toe of a weld
lack fusion between weld metal and HAZ
undercut on root pass
both a and b
29. The throat thickness of a ¾ inch fillet weld is?
27.5mm
24mm
13.5mm
12.5mm
30. To test a component for vibrational loading, a suitable mechanical test would be:
Fatigue
Impact
Compressive
Tensile
1 thought on “Preparatory Questions (Set – 2)”
Ky
question 6 , ” the most serious type of defects…..” the answer should be ” Cracks”
question 6 , ” the most serious type of defects…..” the answer should be ” Cracks”