aws cwi study material pdf

Q:- Which of the following may increase the risk of haz cracking when welding thick section carbon manganese steel?

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1. Slow cooling after welding
2. Low moisture content in the electrode covering
3. Use of a steel grade with a low cev
4. Use of a low heat input

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Q:-Cast and helix are terms that refers to

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A. Ingredients in the flux coating
B. Bead deposition techniques for distortion control
C.quality of the welding wires
D. Sources from which wires are drawn

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Q:- Undercutting adjacent to the final bead on the outside of production pipe welds shall:

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1. Not be permitted
2. Not be more than 1/32 inch or 12.5% of the pipe wall thickness, whichever is smaller
3. Not be more than 1/8 inch or 6% of the pipe wall thickness, whichever is smaller
4. Always be acceptable if the inspector does not see it
5. None of the above

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Q:- To BS 499 part 2, which of the following is true for a welding symbol?

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1. This or arrow side of the joint goes on top of the reference line
2. This or arrow side of the joint goes below the reference line
3. This or arrow side of the joint goes in the middle of the reference line
4. All of the above

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Q:- The exposed surfaces of each fillet-weld-break specimen shall show:

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1. No Slag inclusions greater than 1/4 inch
2. At least 3/4 inches sound metal between adjacent inclusions
3. Complete penetration and fusion
4. The tensile strength of the specimen
5. None of the above

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Q:- One the advantages of ultrasonic inspection in relation to radiographic testing to;

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A. Access is generally only required from one side (surface)of the component being tested
B. The designated work area must be closed off by barriers, therefore safety is increased
C. This materials can be easily examined
D. A permanent image of the defect can be obtained

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Q:- Which of the following is not the reason for the increase of HAZ cracking when welding carbon manganese steels?

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1. Fast cooling after welding
2. High manganese content
3. High carbon content
4. None of the above

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