Electrical Engineering MCQs on Power System Protection
Contents
A differential relay measures vector difference between
A differential relay measures vector difference between
- Two currents
- Two or more similar electrical quantities
- Two voltages
- None of the above
Correct answer: 2. Two or more similar electrical quantities
Protective relays are devices that detect abnormal conditions in electrical circuits by assessing
Protective relays are devices that detect abnormal conditions in electrical circuits by assessing
- Constantly the electrical quantities which differ during normal and abnormal conditions
- Current during abnormal condition
- Voltage during abnormal condition
- None of these
Correct answer: 1. Constantly the electrical quantities which differ during normal and abnormal conditions
Shunt capacitance is neglected in case of
Shunt capacitance is neglected in case of
- Long transmission line
- Medium and long transmission lines
- Medium transmission line
- Short transmission line
Correct answer: 4. Short transmission line
A switchgear is used for
A switchgear is used for
- Interrupting an electrical circuit
- Switching an electrical circuit
- Switching and controlling an electrical circuit
- Switching, controlling and protecting the electrical circuit and equipment
Correct answer: 4. Switching, controlling and protecting the electrical circuit and equipment
Insulation resistance of high voltage circuit breakers is greater than
Insulation resistance of high voltage circuit breakers is greater than
- 1 mega ohms
- 10 mega ohms
- 100 mega ohms
- 500 mega ohms
Correct answer: 3. 100 mega ohms