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Consider the following statements in respect of oxy-acetylene welding:
1. The joint is not heated to a state of fusion.
2. No pressure is used.
3. Oxygen is stored in steel cylinder at a pressure of 14 MPa.
4. When there is an excess of acetylene used, there is a decided change in the appearance of flame.
Which of the statements given above are correct?
- a)1, 2 and 3
- b)2, 3 and 4
- c)1, 3 and 4
- d)1, 2 and 4
Correct answer is option 'B'. Can you explain this answer?
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Consider the following statements in respect of oxy-acetylene welding:...
the joint is heated to a state of fusion.
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Consider the following statements in respect of oxy-acetylene welding:...
The correct answer is option B, which includes statements 2, 3, and 4. Let's examine each statement and explain why it is correct or incorrect.
Statement 1: The joint is not heated to a state of fusion.
This statement is incorrect. In oxy-acetylene welding, the joint is heated to a state of fusion. The high temperature flame generated by the oxy-acetylene torch melts the base metal and filler metal, creating a molten pool. As the pool cools and solidifies, it forms a strong bond between the two pieces being welded.
Statement 2: No pressure is used.
This statement is correct. In oxy-acetylene welding, the flame is produced by the combustion of acetylene gas with oxygen. The pressure of the gases is regulated using separate regulators for each gas. However, the welding process itself does not involve the application of pressure. The welding torch is used to direct the flame onto the joint, melting the metal and creating the weld.
Statement 3: Oxygen is stored in a steel cylinder at a pressure of 14 MPa.
This statement is correct. Oxygen is typically stored in steel cylinders under high pressure to ensure an adequate supply for welding operations. The pressure can vary depending on the specific application and cylinder size, but 14 MPa (megapascals) is within the typical range.
Statement 4: When there is an excess of acetylene used, there is a decided change in the appearance of the flame.
This statement is correct. The appearance of the flame in an oxy-acetylene torch can provide valuable information about the gas mixture being used. When there is an excess of acetylene (compared to the ideal ratio for complete combustion), the flame will become sooty and produce a yellow color. This indicates that the flame is rich in unburned carbon particles. Adjusting the gas mixture to the correct ratio will result in a clean, blue flame.
In summary, statement 1 is incorrect, but statements 2, 3, and 4 are correct.
Statement 1: The joint is not heated to a state of fusion.
This statement is incorrect. In oxy-acetylene welding, the joint is heated to a state of fusion. The high temperature flame generated by the oxy-acetylene torch melts the base metal and filler metal, creating a molten pool. As the pool cools and solidifies, it forms a strong bond between the two pieces being welded.
Statement 2: No pressure is used.
This statement is correct. In oxy-acetylene welding, the flame is produced by the combustion of acetylene gas with oxygen. The pressure of the gases is regulated using separate regulators for each gas. However, the welding process itself does not involve the application of pressure. The welding torch is used to direct the flame onto the joint, melting the metal and creating the weld.
Statement 3: Oxygen is stored in a steel cylinder at a pressure of 14 MPa.
This statement is correct. Oxygen is typically stored in steel cylinders under high pressure to ensure an adequate supply for welding operations. The pressure can vary depending on the specific application and cylinder size, but 14 MPa (megapascals) is within the typical range.
Statement 4: When there is an excess of acetylene used, there is a decided change in the appearance of the flame.
This statement is correct. The appearance of the flame in an oxy-acetylene torch can provide valuable information about the gas mixture being used. When there is an excess of acetylene (compared to the ideal ratio for complete combustion), the flame will become sooty and produce a yellow color. This indicates that the flame is rich in unburned carbon particles. Adjusting the gas mixture to the correct ratio will result in a clean, blue flame.
In summary, statement 1 is incorrect, but statements 2, 3, and 4 are correct.
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Consider the following statements in respect of oxy-acetylene welding: 1. The joint is not heated to a state of fusion. 2. No pressure is used. 3. Oxygen is stored in steel cylinder at a pressure of 14 MPa. 4. When there is an excess of acetylene used, there is a decided change in the appearance of flame. Which of the statements given above are correct?a)1, 2 and 3 b)2, 3 and 4 c)1, 3 and 4 d)1, 2 and 4Correct answer is option 'B'. Can you explain this answer?
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Consider the following statements in respect of oxy-acetylene welding: 1. The joint is not heated to a state of fusion. 2. No pressure is used. 3. Oxygen is stored in steel cylinder at a pressure of 14 MPa. 4. When there is an excess of acetylene used, there is a decided change in the appearance of flame. Which of the statements given above are correct?a)1, 2 and 3 b)2, 3 and 4 c)1, 3 and 4 d)1, 2 and 4Correct 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 statements in respect of oxy-acetylene welding: 1. The joint is not heated to a state of fusion. 2. No pressure is used. 3. Oxygen is stored in steel cylinder at a pressure of 14 MPa. 4. When there is an excess of acetylene used, there is a decided change in the appearance of flame. Which of the statements given above are correct?a)1, 2 and 3 b)2, 3 and 4 c)1, 3 and 4 d)1, 2 and 4Correct 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 statements in respect of oxy-acetylene welding: 1. The joint is not heated to a state of fusion. 2. No pressure is used. 3. Oxygen is stored in steel cylinder at a pressure of 14 MPa. 4. When there is an excess of acetylene used, there is a decided change in the appearance of flame. Which of the statements given above are correct?a)1, 2 and 3 b)2, 3 and 4 c)1, 3 and 4 d)1, 2 and 4Correct answer is option 'B'. Can you explain this answer?.
Consider the following statements in respect of oxy-acetylene welding: 1. The joint is not heated to a state of fusion. 2. No pressure is used. 3. Oxygen is stored in steel cylinder at a pressure of 14 MPa. 4. When there is an excess of acetylene used, there is a decided change in the appearance of flame. Which of the statements given above are correct?a)1, 2 and 3 b)2, 3 and 4 c)1, 3 and 4 d)1, 2 and 4Correct 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 statements in respect of oxy-acetylene welding: 1. The joint is not heated to a state of fusion. 2. No pressure is used. 3. Oxygen is stored in steel cylinder at a pressure of 14 MPa. 4. When there is an excess of acetylene used, there is a decided change in the appearance of flame. Which of the statements given above are correct?a)1, 2 and 3 b)2, 3 and 4 c)1, 3 and 4 d)1, 2 and 4Correct 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 statements in respect of oxy-acetylene welding: 1. The joint is not heated to a state of fusion. 2. No pressure is used. 3. Oxygen is stored in steel cylinder at a pressure of 14 MPa. 4. When there is an excess of acetylene used, there is a decided change in the appearance of flame. Which of the statements given above are correct?a)1, 2 and 3 b)2, 3 and 4 c)1, 3 and 4 d)1, 2 and 4Correct answer is option 'B'. Can you explain this answer?.
Solutions for Consider the following statements in respect of oxy-acetylene welding: 1. The joint is not heated to a state of fusion. 2. No pressure is used. 3. Oxygen is stored in steel cylinder at a pressure of 14 MPa. 4. When there is an excess of acetylene used, there is a decided change in the appearance of flame. Which of the statements given above are correct?a)1, 2 and 3 b)2, 3 and 4 c)1, 3 and 4 d)1, 2 and 4Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
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