aws cwi course material

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:- 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:- Welding with higher heat input with carbon manganese steel may cause :

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  • Higher strength of joint
  • Higher hardness value
  • Higher integrity
  • Higher distortion

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Q:- In friction welding, is the metal at the interface in the :

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(a) Liquid state.

(b) Solid state.

(c) Plastic state.

(d) Elastic state.

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