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Consider the following statements pertaining to arc welding:
1. AC arc welding electrodes are coated with sodium silicate binders.
2. DC arc welding electrodes are coated with potassium silicate binders.
3. Potassium has a lower ionization potential as compared with sodium.
4. Reignition requires a voltage higher than the normal arc voltage.
Which of the above statements are valid?
1. AC arc welding electrodes are coated with sodium silicate binders.
2. DC arc welding electrodes are coated with potassium silicate binders.
3. Potassium has a lower ionization potential as compared with sodium.
4. Reignition requires a voltage higher than the normal arc voltage.
Which of the above statements are valid?
- a)1 and 2
- b)1, 2 and 3
- c)2, 3 and 4
- d)3 and 4
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Consider the following statements pertaining to arc welding:1. AC arc ...
1. AC arc welding electrodes are coated with potassium silicate binders.
2. DC arc welding electrodes are coated with sodium silicate binders.
3. An AC arc must reignite itself after every crossing of the zero current instant. Reignition requires a voltage higher than the normal arc voltage.
4. The process of reignition of an arc is facilitated by the presence of ions having a low ionization potential.
2. DC arc welding electrodes are coated with sodium silicate binders.
3. An AC arc must reignite itself after every crossing of the zero current instant. Reignition requires a voltage higher than the normal arc voltage.
4. The process of reignition of an arc is facilitated by the presence of ions having a low ionization potential.
Most Upvoted Answer
Consider the following statements pertaining to arc welding:1. AC arc ...
Arc welding is a type of welding process that uses an electric arc between an electrode and the base material to melt and join the metals. In arc welding, the electrodes are coated with binders to improve the welding process and provide certain properties to the weld.
1. AC arc welding electrodes are coated with sodium silicate binders: This statement is valid. AC arc welding electrodes are commonly coated with sodium silicate binders. The sodium silicate binder helps to stabilize the arc and improve the welding characteristics. It also provides a protective coating on the electrode that reduces spatter and improves the weld quality.
2. DC arc welding electrodes are coated with potassium silicate binders: This statement is not valid. DC arc welding electrodes are typically coated with a mixture of minerals that include iron powder, titanium dioxide, and other materials. The coating on DC electrodes is designed to provide a stable arc and improve the weld quality.
3. Potassium has a lower ionization potential as compared with sodium: This statement is valid. Ionization potential refers to the energy required to remove an electron from an atom or ion. Potassium has a lower ionization potential compared to sodium, which means it requires less energy to remove an electron from a potassium atom or ion. This property is related to the electrical conductivity of the material and can affect the welding characteristics.
4. Reignition requires a voltage higher than the normal arc voltage: This statement is valid. Reignition refers to the process of restarting the arc after it has been extinguished. To reignite the arc, a higher voltage is typically required compared to the normal arc voltage. This is because the initial arc voltage is required to initiate and sustain the arc, while a higher voltage is needed to overcome the resistance and create a spark to reignite the arc.
In conclusion, the valid statements pertaining to arc welding are:
- AC arc welding electrodes are coated with sodium silicate binders.
- Potassium has a lower ionization potential as compared with sodium.
- Reignition requires a voltage higher than the normal arc voltage.
1. AC arc welding electrodes are coated with sodium silicate binders: This statement is valid. AC arc welding electrodes are commonly coated with sodium silicate binders. The sodium silicate binder helps to stabilize the arc and improve the welding characteristics. It also provides a protective coating on the electrode that reduces spatter and improves the weld quality.
2. DC arc welding electrodes are coated with potassium silicate binders: This statement is not valid. DC arc welding electrodes are typically coated with a mixture of minerals that include iron powder, titanium dioxide, and other materials. The coating on DC electrodes is designed to provide a stable arc and improve the weld quality.
3. Potassium has a lower ionization potential as compared with sodium: This statement is valid. Ionization potential refers to the energy required to remove an electron from an atom or ion. Potassium has a lower ionization potential compared to sodium, which means it requires less energy to remove an electron from a potassium atom or ion. This property is related to the electrical conductivity of the material and can affect the welding characteristics.
4. Reignition requires a voltage higher than the normal arc voltage: This statement is valid. Reignition refers to the process of restarting the arc after it has been extinguished. To reignite the arc, a higher voltage is typically required compared to the normal arc voltage. This is because the initial arc voltage is required to initiate and sustain the arc, while a higher voltage is needed to overcome the resistance and create a spark to reignite the arc.
In conclusion, the valid statements pertaining to arc welding are:
- AC arc welding electrodes are coated with sodium silicate binders.
- Potassium has a lower ionization potential as compared with sodium.
- Reignition requires a voltage higher than the normal arc voltage.
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Consider the following statements pertaining to arc welding:1. AC arc welding electrodes are coated with sodium silicate binders.2. DC arc welding electrodes are coated with potassium silicate binders.3. Potassium has a lower ionization potential as compared with sodium.4. Reignition requires a voltage higher than the normal arc voltage.Which of the above statements are valid?a)1 and 2b)1, 2 and 3c)2, 3 and 4d)3 and 4Correct answer is option 'D'. Can you explain this answer?
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Consider the following statements pertaining to arc welding:1. AC arc welding electrodes are coated with sodium silicate binders.2. DC arc welding electrodes are coated with potassium silicate binders.3. Potassium has a lower ionization potential as compared with sodium.4. Reignition requires a voltage higher than the normal arc voltage.Which of the above statements are valid?a)1 and 2b)1, 2 and 3c)2, 3 and 4d)3 and 4Correct answer is option 'D'. 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 pertaining to arc welding:1. AC arc welding electrodes are coated with sodium silicate binders.2. DC arc welding electrodes are coated with potassium silicate binders.3. Potassium has a lower ionization potential as compared with sodium.4. Reignition requires a voltage higher than the normal arc voltage.Which of the above statements are valid?a)1 and 2b)1, 2 and 3c)2, 3 and 4d)3 and 4Correct answer is option 'D'. 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 pertaining to arc welding:1. AC arc welding electrodes are coated with sodium silicate binders.2. DC arc welding electrodes are coated with potassium silicate binders.3. Potassium has a lower ionization potential as compared with sodium.4. Reignition requires a voltage higher than the normal arc voltage.Which of the above statements are valid?a)1 and 2b)1, 2 and 3c)2, 3 and 4d)3 and 4Correct answer is option 'D'. Can you explain this answer?.
Consider the following statements pertaining to arc welding:1. AC arc welding electrodes are coated with sodium silicate binders.2. DC arc welding electrodes are coated with potassium silicate binders.3. Potassium has a lower ionization potential as compared with sodium.4. Reignition requires a voltage higher than the normal arc voltage.Which of the above statements are valid?a)1 and 2b)1, 2 and 3c)2, 3 and 4d)3 and 4Correct answer is option 'D'. 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 pertaining to arc welding:1. AC arc welding electrodes are coated with sodium silicate binders.2. DC arc welding electrodes are coated with potassium silicate binders.3. Potassium has a lower ionization potential as compared with sodium.4. Reignition requires a voltage higher than the normal arc voltage.Which of the above statements are valid?a)1 and 2b)1, 2 and 3c)2, 3 and 4d)3 and 4Correct answer is option 'D'. 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 pertaining to arc welding:1. AC arc welding electrodes are coated with sodium silicate binders.2. DC arc welding electrodes are coated with potassium silicate binders.3. Potassium has a lower ionization potential as compared with sodium.4. Reignition requires a voltage higher than the normal arc voltage.Which of the above statements are valid?a)1 and 2b)1, 2 and 3c)2, 3 and 4d)3 and 4Correct answer is option 'D'. Can you explain this answer?.
Solutions for Consider the following statements pertaining to arc welding:1. AC arc welding electrodes are coated with sodium silicate binders.2. DC arc welding electrodes are coated with potassium silicate binders.3. Potassium has a lower ionization potential as compared with sodium.4. Reignition requires a voltage higher than the normal arc voltage.Which of the above statements are valid?a)1 and 2b)1, 2 and 3c)2, 3 and 4d)3 and 4Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
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Consider the following statements pertaining to arc welding:1. AC arc welding electrodes are coated with sodium silicate binders.2. DC arc welding electrodes are coated with potassium silicate binders.3. Potassium has a lower ionization potential as compared with sodium.4. Reignition requires a voltage higher than the normal arc voltage.Which of the above statements are valid?a)1 and 2b)1, 2 and 3c)2, 3 and 4d)3 and 4Correct answer is option 'D'. Can you explain this answer?, a detailed solution for Consider the following statements pertaining to arc welding:1. AC arc welding electrodes are coated with sodium silicate binders.2. DC arc welding electrodes are coated with potassium silicate binders.3. Potassium has a lower ionization potential as compared with sodium.4. Reignition requires a voltage higher than the normal arc voltage.Which of the above statements are valid?a)1 and 2b)1, 2 and 3c)2, 3 and 4d)3 and 4Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of Consider the following statements pertaining to arc welding:1. AC arc welding electrodes are coated with sodium silicate binders.2. DC arc welding electrodes are coated with potassium silicate binders.3. Potassium has a lower ionization potential as compared with sodium.4. Reignition requires a voltage higher than the normal arc voltage.Which of the above statements are valid?a)1 and 2b)1, 2 and 3c)2, 3 and 4d)3 and 4Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Consider the following statements pertaining to arc welding:1. AC arc welding electrodes are coated with sodium silicate binders.2. DC arc welding electrodes are coated with potassium silicate binders.3. Potassium has a lower ionization potential as compared with sodium.4. Reignition requires a voltage higher than the normal arc voltage.Which of the above statements are valid?a)1 and 2b)1, 2 and 3c)2, 3 and 4d)3 and 4Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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