Insulation Resistance of a System Interview Questions:
Following are the below Insulation Resistance of a System Interview Questions and Important Questions which is very useful for interviews and exams
1. Describe a method of measuring the insulation resistance of a dc service main.
2. Enumerate the faults which are most likely to occur in underground cables. Describe Blavier’s test for locating ground fault on a single core cable.
3. What are the faults that usually occur in cables ? How do you localize them ? Describe using diagrams.
4. Discuss the procedure to locate fault in an underground three-phase cable:
- With one conductor broken.
- With one conductor faulted to ground.
5. Explain the Murray loop method to find the faults in underground cables.
6. Describe the Murray’s loop for localizing of earth and short-circuit faults in cables.
7. What is essential difference between Murray and Varley loop tests ? Describe a suitable test for location of earth and short circuit faults in a cable.
8. What is Varley loop test ? Explain the procedure of locating a fault on a cable by this test.
9. How are ‘cable faults’ located and ‘insulation resistance’ measured ?
10. Write short notes on the following :
- Measurement of insulation resistance of dc live mains.
- Types of cable faults.
- Loop tests on cables.
- Blavier test for locating earth fault on a single-core cable.
- Murray loop cable.
- Localization of cable faults by Varley loop tests.
- Testing of cables.
- Open circuit fault test.