1 Applying preheat when welding carbon manganese steel is normally done to avoid: a) Slag inclusions b...
1 Applying preheat when welding carbon manganese steel is normally done to avoid:
a) Slag inclusions
b) Hydrogen cracking
c) Lack of sidewall fusion
d) Porosity
2 Which of following mechanical properties of a weld in carbon manganese steel is most affected if the heat input per unit length of weld is excessively high?
a) Elongation
b) Tensile strength
c) Hardness
d) Toughness
3 You observe centerline cracking a weld that has been made one of five work stations each making similar components. The first action to take is:
a) Impound all welding consumables
b) Report the occurrence to high authority
c) Stop all welding
d) Call for full NDT checks
4 Which of the following defects is unlikely to be found by visual inspection?
a) Linear misalignment
b) Undercut
c) Overlap
d) Linear slag inclusion
very useful and pls send more questions
ReplyDeleteQuestion no 2, the correct answer is c)Hardness excessive heat will cause the hardness value increase which leading to material brittle..
ReplyDeleteYou are wrong high heat input will reduce toughness, low heat input will increase hardness.
ReplyDeletepls send more sample question multiple choice 3.2 because i need more excersise this paper
ReplyDeleteAns for Q.2: If the heat input is high, cooling will become slow. So coarser grain will form as the time for grain growth is high. Larger the grain size reduces the hardness and toughness. Reduction in toughness is more serious as reduction in hardness will improve ductility. So the Ans is "Toughness"
ReplyDeleteNew CSWIP Book Material link below
ReplyDeletehttp://www.tanjai.org/e-library/cswip-3-1-book-material-pdf/chapter/1-typical-duties-of-welding-inspectors-81