
Electrician 4th sem CB & Relays
Authored by KRISHNA SAKHA KAR
Professional Development
10th Grade
Used 7+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which circuit breaker is installed along with wiring circuit against leakage current protection?
OCB
MCB
ELCB
MCCB
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which relay hold their contacts in position after power is cutoff?
Read relay
Current relay
Voltage relay
Latching relay
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the name of circuit breaker?
Oil circuit breaker
Air blast circuit breaker
Vacuum circuit breaker
Air break circuit breaker
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How the rupturing capacity of circuit breaker is rated?
KV
KW
MVA
KVAR
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the pick-up voltage in a over voltage relay indicated?
Working voltage of relay
Maximum voltage rating of relay
Minimum voltage rating of relay
Minimum voltage to start the relay
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the function of Buchholz relay in power transformer?
Over load and short circuit protection
Over voltage and earth fault protection
Open circuit and earth fault protection
Open circuit and over voltage protection
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of load is protected by G’ series MCB?
Ovens
Geysers
Air conditioners
General lighting systems
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