ICIT: SEQUENCE OF CONTROL+DIRECT AND INDIRECT CONTACT

What is the purpose of the kWh (Energy) meter in the AC incoming supply system?

• To provide overcurrent protection

• To distribute energy to final circuits

• To register energy consumption

• To isolate and switch the circuit

What are the two forms of electric shock mentioned in SS638: 2018?

• Direct and Indirect

• Primary and Secondary

• Visible and Invisible

• Internal and External

What is the purpose of earthed equipotential bonding and automatic disconnection of supply?

• Protection against short circuit

• Protection against overcurrent

• Protection against indirect contact

• Protection against direct contact

What is the main characteristic of Class II equipment?

• Use of supplementary insulation for safety

• Presence of live parts in the equipment

• Reliance on basic insulation for protection against electric shock

• Connection of exposed metal work to a protective conductor

What is the definition of overload current?

• Result of two or more live conductors touching together

• Result of a phase conductor touching the protective conductor

• Result of adding more loads than the designed condition

• Result of a current passing through the body of a person

What is the term used to signify the possible value of short-circuit current at the point where the protective device is installed?

• Prospective short-circuit current

• Fault current

• Residual current

• Overload current

Where should fuses and single-pole circuit breakers be installed in systems with earthed neutrals?

• In the neutral conductor

• In the phase conductors

• In the protective conductor

• In the earth conductor

What happens if the neutral is fused in a circuit during an overload or short-circuit?

• The circuit will operate normally

• The live fuse will blow

• The circuit becomes safe

• The circuit becomes dangerous

What is the purpose of bonding all extraneous conductive parts in an electrical system?

• To reduce the insulation resistance

• To prevent the flow of current

• To create an equipotential zone

• To increase the risk of electric shock

What is the most common method of protection against indirect shock?

• Use of Class IV equipment

• Use of Class III equipment

• Use of Class II equipment

• Use of Class I equipment