UNIT - 1 – Generation Of Electricity & Distribution in Building

Which of the following is not a renewable source of energy?

• Solar

• Wind

• Thermal (coal-based)

• Hydroelectric

In a hydroelectric power plant, electricity is generated by converting:

• Heat energy → Mechanical energy → Electrical energy

• Potential energy → Kinetic energy → Electrical energy

• Solar energy → Heat → Electrical energy

• None of the above

Ohm’s law is mathematically expressed as:

• I = P × V

• V = IR

• R = VI

• P = V/I

True/False: Kirchhoff’s Current Law (KCL) states that the algebraic sum of currents entering a node is equal to the sum of currents leaving it.

The unit of electrical power is:

• Volt

• Watt

• Ampere

• Ohm

True/False: A two-phase system uses two alternating voltages, 90° out of phase with each other.

The main advantage of a three-phase system over a single-phase system is:

• Higher voltage drop

• More power transfer efficiency

• Lower reliability

• Greater transmission loss

Electricity is transmitted at high voltages because:

• It reduces transmission current and power loss

• It increases frequency stability

• It improves transformer performance only

• It makes the wires thicker

(a)   is used to steps down high voltage to distribution voltage levels before entering consumer facilities.

True/False: Conduits are used to protect and route electrical wiring in a building.