WorksheetsUNIT - 1 – Generation Of Electricity & Distribution in Building
Total questions: 20
Worksheet time: 21mins
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.
The purpose of earthing is:
To increase circuit resistance
To provide a safe path for fault current
To reduce power consumption
To prevent over-voltage in transformers
What is the role of a lightning conductor in a building?
To increase the building’s electrical load
To safely direct lightning strikes into the ground
To prevent electrical energy consumption
To store energy from lightning
A generator converts:
Electrical energy → Mechanical energy
Mechanical energy → Electrical energy
Heat energy → Mechanical energy only
Chemical energy → Heat energy
True/False: An inverter converts DC (Direct Current) into AC (Alternating Current).
Give one practical difference between a generator and an inverter.
The sequence of power delivery is: Power Plant → ______ → Transmission Lines → ______ → Distribution Board → End user.
(a)
Why is copper often used as a material for lightning conductors?
Which type of conduit is most commonly used in concealed house wiring?
Lead conduit
The purpose of a switchboard in electrical installations is:
_______ wires are used in temporary installations such as festoons and outdoor functions.
