Surprise Quiz - II

Which of the following is NOT a component of a residential electrical system?

• Distribution board

• Earthing system

• Transformer

• Circuit breakers

The total connected load for a small residential building is usually expressed in_______.

• amperes

• volts

• watts

• kVA

In a residential wiring system, which wire color is used for the live (phase) conductor as per standard codes?

• Red

• Green

• Blue

• Black

What is the function of a Residual Current Circuit Breaker (RCCB) in residential electrification?

• Protect against electric shock and leakage current

• Prevent short circuits

• Control voltage fluctuations

• Reduce power consumption

Which of the following wiring methods is most suitable for concealed wiring in residential buildings?

• Cleat wiring

• PVC conduit wiring

• Open wiring

• Surface conduit wiring

The number of power sub-circuits required in a residential building depends on______.

• total load demand

• wiring method used

• Number of floors

• Type of earthing used

What is the purpose of a distribution board (DB) in residential electrification?

• Converts AC to DC

• Distributes electricity safely to different circuits

• Stores electrical energy

• Measures power consumption

Why is it necessary to select a higher-rated main switch than the calculated load?

• To prevent overload and ensure future expansion

• To reduce the cost of wiring

• To improve voltage fluctuations

• To make installation easier

According to standard electrical guidelines, what is the recommended safety margin when selecting the main switch rating?

• 50% of total load

• 25% of total load

• 10% of total load

• 5% of total load

For a small residential house, the main switch should have a minimum rating of________.

• 16A

• 63A

• 32A

• 100A