Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > Consider the following statement :1. The insu...
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Consider the following statement :
1. The insulation resistance of cable will increase if the length of the cable is increased
2. For the same overall diameter of cable, the grading of cable will increases the safe working voltage
3. The normal operating temperature of PVC cable is 70ºC
4. The thermal resistance of soil increase as the moisture content of soil increase
Of these statement
1. The insulation resistance of cable will increase if the length of the cable is increased
2. For the same overall diameter of cable, the grading of cable will increases the safe working voltage
3. The normal operating temperature of PVC cable is 70ºC
4. The thermal resistance of soil increase as the moisture content of soil increase
Of these statement
- a)1 and 2 are correct
- b)2 and 3 are correct
- c)3 are 4 are correct
- d)1 are 4 are correct
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Consider the following statement :1. The insulation resistance of cabl...
**Explanation:**
The correct answer is option 'B', which states that statements 2 and 3 are correct.
Let's analyze each statement to understand why.
**Statement 1:** The insulation resistance of a cable will increase if the length of the cable is increased.
This statement is incorrect. The insulation resistance of a cable is not dependent on its length; it is primarily determined by the insulation material and its quality. The resistance of the insulation remains the same regardless of the cable length.
**Statement 2:** For the same overall diameter of cable, the grading of the cable will increase the safe working voltage.
This statement is correct. Grading of a cable refers to the arrangement of different layers of insulation materials to provide a smooth transition of electric field lines and reduce the stress on the insulation. By using proper grading techniques, the safe working voltage of the cable can be increased without risking insulation breakdown.
**Statement 3:** The normal operating temperature of PVC cable is 70°C.
This statement is incorrect. The normal operating temperature of PVC (Polyvinyl Chloride) cables is typically limited to around 70°C. Exceeding this temperature can cause the PVC insulation to degrade, leading to insulation failure and potential hazards. Therefore, it is important to ensure that PVC cables are not operated above their rated temperature.
**Statement 4:** The thermal resistance of soil increases as the moisture content of the soil increases.
This statement is correct. Moisture in the soil affects its thermal conductivity and, consequently, the thermal resistance. As the moisture content increases, the soil becomes more conductive and has lower thermal resistance. This is why wet soil tends to have lower thermal resistance compared to dry soil.
In summary, statements 2 and 4 are correct, while statements 1 and 3 are incorrect. Therefore, the correct answer is option 'B' - 2 and 3 are correct.
The correct answer is option 'B', which states that statements 2 and 3 are correct.
Let's analyze each statement to understand why.
**Statement 1:** The insulation resistance of a cable will increase if the length of the cable is increased.
This statement is incorrect. The insulation resistance of a cable is not dependent on its length; it is primarily determined by the insulation material and its quality. The resistance of the insulation remains the same regardless of the cable length.
**Statement 2:** For the same overall diameter of cable, the grading of the cable will increase the safe working voltage.
This statement is correct. Grading of a cable refers to the arrangement of different layers of insulation materials to provide a smooth transition of electric field lines and reduce the stress on the insulation. By using proper grading techniques, the safe working voltage of the cable can be increased without risking insulation breakdown.
**Statement 3:** The normal operating temperature of PVC cable is 70°C.
This statement is incorrect. The normal operating temperature of PVC (Polyvinyl Chloride) cables is typically limited to around 70°C. Exceeding this temperature can cause the PVC insulation to degrade, leading to insulation failure and potential hazards. Therefore, it is important to ensure that PVC cables are not operated above their rated temperature.
**Statement 4:** The thermal resistance of soil increases as the moisture content of the soil increases.
This statement is correct. Moisture in the soil affects its thermal conductivity and, consequently, the thermal resistance. As the moisture content increases, the soil becomes more conductive and has lower thermal resistance. This is why wet soil tends to have lower thermal resistance compared to dry soil.
In summary, statements 2 and 4 are correct, while statements 1 and 3 are incorrect. Therefore, the correct answer is option 'B' - 2 and 3 are correct.
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Consider the following statement :1. The insulation resistance of cable will increase if the length of the cable is increased2. For the same overall diameter of cable, the grading of cable will increases the safe working voltage3. The normal operating temperature of PVC cable is 70C4. The thermal resistance of soil increase as the moisture content of soil increaseOf these statementa)1 and 2 are correctb)2 and 3 are correctc)3 are 4 are correctd)1 are 4 are correctCorrect answer is option 'B'. Can you explain this answer?
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Consider the following statement :1. The insulation resistance of cable will increase if the length of the cable is increased2. For the same overall diameter of cable, the grading of cable will increases the safe working voltage3. The normal operating temperature of PVC cable is 70C4. The thermal resistance of soil increase as the moisture content of soil increaseOf these statementa)1 and 2 are correctb)2 and 3 are correctc)3 are 4 are correctd)1 are 4 are correctCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Consider the following statement :1. The insulation resistance of cable will increase if the length of the cable is increased2. For the same overall diameter of cable, the grading of cable will increases the safe working voltage3. The normal operating temperature of PVC cable is 70C4. The thermal resistance of soil increase as the moisture content of soil increaseOf these statementa)1 and 2 are correctb)2 and 3 are correctc)3 are 4 are correctd)1 are 4 are correctCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statement :1. The insulation resistance of cable will increase if the length of the cable is increased2. For the same overall diameter of cable, the grading of cable will increases the safe working voltage3. The normal operating temperature of PVC cable is 70C4. The thermal resistance of soil increase as the moisture content of soil increaseOf these statementa)1 and 2 are correctb)2 and 3 are correctc)3 are 4 are correctd)1 are 4 are correctCorrect answer is option 'B'. Can you explain this answer?.
Consider the following statement :1. The insulation resistance of cable will increase if the length of the cable is increased2. For the same overall diameter of cable, the grading of cable will increases the safe working voltage3. The normal operating temperature of PVC cable is 70C4. The thermal resistance of soil increase as the moisture content of soil increaseOf these statementa)1 and 2 are correctb)2 and 3 are correctc)3 are 4 are correctd)1 are 4 are correctCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Consider the following statement :1. The insulation resistance of cable will increase if the length of the cable is increased2. For the same overall diameter of cable, the grading of cable will increases the safe working voltage3. The normal operating temperature of PVC cable is 70C4. The thermal resistance of soil increase as the moisture content of soil increaseOf these statementa)1 and 2 are correctb)2 and 3 are correctc)3 are 4 are correctd)1 are 4 are correctCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statement :1. The insulation resistance of cable will increase if the length of the cable is increased2. For the same overall diameter of cable, the grading of cable will increases the safe working voltage3. The normal operating temperature of PVC cable is 70C4. The thermal resistance of soil increase as the moisture content of soil increaseOf these statementa)1 and 2 are correctb)2 and 3 are correctc)3 are 4 are correctd)1 are 4 are correctCorrect answer is option 'B'. Can you explain this answer?.
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ample number of questions to practice Consider the following statement :1. The insulation resistance of cable will increase if the length of the cable is increased2. For the same overall diameter of cable, the grading of cable will increases the safe working voltage3. The normal operating temperature of PVC cable is 70C4. The thermal resistance of soil increase as the moisture content of soil increaseOf these statementa)1 and 2 are correctb)2 and 3 are correctc)3 are 4 are correctd)1 are 4 are correctCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
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