#1
What is the primary function of a circuit breaker in an electrical distribution system?
To interrupt abnormal currents
ExplanationCircuit breakers interrupt abnormal currents, protecting the system from damage.
#2
Which component of an electrical distribution system is designed to disconnect the electrical supply in case of excess current flow to prevent damage to the system?
Fuse
ExplanationFuses disconnect the electrical supply in case of excess current flow to prevent damage in distribution systems.
#3
Which component of an electrical distribution system is responsible for stepping down voltage for distribution to consumers?
Transformer
ExplanationTransformers step down voltage for distribution to consumers in electrical distribution systems.
#4
Which component in an electrical distribution system is used to protect equipment from overvoltages and lightning strikes?
Surge arrester
ExplanationSurge arresters protect equipment from overvoltages and lightning strikes in electrical distribution systems.
#5
Which component in an electrical distribution system regulates voltage and protects against voltage fluctuations?
Transformer
ExplanationTransformers regulate voltage and protect against fluctuations in electrical distribution systems.
#6
Which of the following components is responsible for connecting the distribution system to the consumer's premises?
Service drop
ExplanationService drops connect the distribution system to the consumer's premises in electrical distribution.
#7
What is the function of an isolator in an electrical distribution system?
To disconnect a part of the system for maintenance
ExplanationIsolators disconnect a part of the system for maintenance purposes in electrical distribution.
#8
In electrical distribution systems, what is the purpose of an earthing system?
To protect against electric shock
ExplanationEarthing systems protect against electric shock in electrical distribution.
#9
In an electrical distribution system, what is the purpose of a recloser?
To automatically restore power after a temporary fault
ExplanationReclosers automatically restore power after temporary faults in electrical distribution systems.
#10
Which of the following is not a typical voltage level in an electrical distribution system?
230 kV
Explanation230 kV is not a typical voltage level in electrical distribution systems.
#11
What is the primary purpose of an overhead line insulator in an electrical distribution system?
To prevent leakage current to the supporting structure
ExplanationOverhead line insulators prevent leakage current to the supporting structure in electrical distribution systems.
#12
Which of the following components is used to connect different sections of a distribution line, allowing flexibility in system operation?
Switch
ExplanationSwitches connect different sections of a distribution line, allowing flexibility in system operation in electrical distribution.