engineering recuitment JVVNL Technical Helper 2022 Mock Test Electrician and Wireman Measuring Instruments
What precaution to be taken while disconnecting the ammeter from terminals of CT (Current Transformer)?
1
Earthing the secondary of CT
2
Short circuiting the terminal of the CT before disconnecting the ammeter
3
Switching a high resistace shut between the terminals of CT after disconnecting the ammeter
4
Short ciruit the terminal of the CT after disconnecting the ammeter
5
All of the above