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Consider the following statements
I) Strength of weld bead is greater than the strength of parent metal.
II) By increasing the welding speed, heat affected zone increases.
III) At the centre of weld pool and towards the heat affected zone the grain structure is coarser and finer
respectively
IV) As the carbon percentage in steels increases, the weldability is increased.
Which of the above statements is/are correct
  • a)
    II and III
  • b)
    I and III
  • c)
    III only
  • d)
    II and IV
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Consider the following statementsI) Strength of weld bead is greaterth...
By increasing welding speed, heat affected zone decreases as parent metal is sunjected to high temperature for less time.
At the centre of weldpool due to low cooling rate coarser grain structure will be produced and towards the heat affected zone due
to higher cooling rate finer grain structure of weld bead will be produced.

Weldability
Mild Steel > Medium Carbon steel
> High Carbon Steel > Alluminium
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Consider the following statementsI) Strength of weld bead is greaterthan the strength of parent metal.II) By increasing the welding speed,heat affected zone increases.III) At the centre of weld pool andtowards the heat affected zone thegrain structure is coarser and finerrespectivelyIV) As the carbon percentage insteels increases, the weldability isincreased.Which of the above statements is/are correcta)II and IIIb)I and IIIc)III onlyd)II and IVCorrect answer is option 'B'. Can you explain this answer?
Question Description
Consider the following statementsI) Strength of weld bead is greaterthan the strength of parent metal.II) By increasing the welding speed,heat affected zone increases.III) At the centre of weld pool andtowards the heat affected zone thegrain structure is coarser and finerrespectivelyIV) As the carbon percentage insteels increases, the weldability isincreased.Which of the above statements is/are correcta)II and IIIb)I and IIIc)III onlyd)II and IVCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Consider the following statementsI) Strength of weld bead is greaterthan the strength of parent metal.II) By increasing the welding speed,heat affected zone increases.III) At the centre of weld pool andtowards the heat affected zone thegrain structure is coarser and finerrespectivelyIV) As the carbon percentage insteels increases, the weldability isincreased.Which of the above statements is/are correcta)II and IIIb)I and IIIc)III onlyd)II and IVCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statementsI) Strength of weld bead is greaterthan the strength of parent metal.II) By increasing the welding speed,heat affected zone increases.III) At the centre of weld pool andtowards the heat affected zone thegrain structure is coarser and finerrespectivelyIV) As the carbon percentage insteels increases, the weldability isincreased.Which of the above statements is/are correcta)II and IIIb)I and IIIc)III onlyd)II and IVCorrect answer is option 'B'. Can you explain this answer?.
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