Power Transmission and Distribution Systems: Interactive Learning Quizzes

Question 1

Which of the following is not a type of electrical substation?

Accepted Answer

Generation

Answer

Step-up

Answer

Step-down

Answer

Distribution

Question 2

What is the primary function of a transformer in an electrical power system?

Accepted Answer

To increase or decrease voltage

Answer

To isolate circuits

Answer

To change phase angle

Answer

To store energy

Question 3

What is the main purpose of a busbar in an electrical substation?

Accepted Answer

To connect different components

Answer

To isolate faults

Answer

To provide protection

Answer

To control voltage

Question 4

The primary purpose of a transmission line is:

Accepted Answer

To transmit electrical power across long distances

Answer

To generate electrical power

Answer

To distribute electrical power directly to consumers

Answer

To convert alternating current (AC) to direct current (DC)

Question 5

Which type of substation is used for increasing voltage levels for long-distance transmission?

Accepted Answer

Transmission substation

Answer

Distribution substation

Answer

Generation substation

Answer

Converter substation

Question 6

An advantage of using overhead power lines compared to underground lines is:

Accepted Answer

Easier inspection and maintenance

Answer

Lower construction costs

Answer

Reduced environmental impact

Answer

Enhanced reliability

Question 7

The purpose of a surge arrester in a power distribution system is to:

Accepted Answer

Suppress power surges

Answer

Control voltage fluctuations

Answer

Prevent overcurrent

Answer

Isolate faults

Question 8

A key challenge in the transition to renewable energy sources for power transmission is:

Accepted Answer

Intermittency and variability of renewable energy generation

Answer

Requirement for grid infrastructure upgrades

Answer

High costs of renewable energy technologies

Answer

Public opposition to renewable energy projects

Question 9

In power transmission and distribution systems, what is the main purpose of suspension insulators?

Accepted Answer

Support and electrically insulate overhead conductors from towers or poles

Answer

Prevent electrical leakage from conductors to the ground

Answer

Protect substation equipment during lightning strikes

Answer

Isolate live conductors from maintenance personnel working on the ground

Question 10

How does increased reactance in a transmission line affect its power transmission capacity?

Accepted Answer

Decreases power transmission capacity

Answer

Increases power transmission capacity

Answer

Has no impact on power transmission capacity

Question 11

What is the primary purpose of a transformer in a power transmission system?

Accepted Answer

To change the voltage level

Answer

To isolate circuits from each other

Answer

To regulate the power flow

Answer

To convert AC to DC

Question 12

What is the purpose of using corona rings on transmission lines?

Accepted Answer

To reduce corona discharge

Answer

To increase capacitance

Answer

To improve insulation effectiveness

Answer

To reduce sag

Question 13

Which of the following is NOT a method used to improve the power factor of a transmission line?

Accepted Answer

Inductors

Answer

Capacitor banks

Answer

Synchronous condensers

Answer

Static VAR compensators

Question 14

What is the role of a protective relay in a power distribution system?

Accepted Answer

To detect and isolate faults

Answer

To regulate voltage and current

Answer

To store backup energy

Answer

To convert AC to DC

Question 15

What is the primary purpose of a step-up transformer in a power transmission system?

Accepted Answer

To increase the voltage level for efficient transmission over long distances.

Answer

To protect the transmission line from overloads.

Answer

To isolate different parts of the system for maintenance.

Answer

To decrease the voltage level for safer distribution to consumers.

Question 16

Which of the following factors primarily determines the power transmission capacity of a transmission line?

Accepted Answer

Conductor size and material

Answer

Insulator type

Answer

Tower height

Answer

Weather conditions

Question 17

What is the main purpose of corona rings on transmission towers?

Accepted Answer

To prevent corona discharge and reduce energy loss.

Answer

To enhance the structural stability of the towers.

Answer

To protect the insulators from environmental factors.

Answer

To provide a path for lightning strikes.

Question 18

What is the primary function of a recloser in a power distribution system?

Accepted Answer

To automatically restore service after a temporary fault.

Answer

To detect and isolate permanent faults.

Answer

To protect transformers from overloads.

Answer

To monitor the power flow in the distribution network.

Question 19

What is the primary role of a distribution management system (DMS) in power distribution operations?

Accepted Answer

To monitor, control, and optimize the distribution network in real-time.

Answer

To protect the distribution system from overloads and faults.

Answer

To isolate faulty sections of the distribution network.

Answer

To generate power for the distribution system.

Question 20

Which of the following is NOT a factor that directly affects the efficiency of power transmission?

Accepted Answer

Line cross-sectional area

Answer

Voltage level

Answer

Line length

Answer

Power factor

Question 21

What is the primary function of a transformer in a power transmission system?

Accepted Answer

To change voltage levels

Answer

To provide overvoltage protection

Answer

To regulate current

Answer

To isolate circuits

Question 22

Which type of substation is used to connect high-voltage transmission lines to lower-voltage distribution systems?

Accepted Answer

Step-down substation

Answer

Autotransformer substation

Answer

Step-up substation

Answer

Switching substation

Question 23

Which of the following is an advantage of using underground cables for power transmission?

Accepted Answer

Improved aesthetics

Answer

Lower maintenance costs

Answer

Enhanced immunity to weather conditions

Answer

Reduced power losses

Question 24

What is the primary purpose of insulators in power transmission systems?

Accepted Answer

Preventing electrical leakage

Answer

Dissipating heat

Answer

Providing mechanical support

Answer

Improving voltage regulation

Question 25

Which of the following is a common type of fault in power transmission systems?

Accepted Answer

Short circuit

Answer

Open circuit

Answer

Power surge

Answer

Overload

Question 26

What is the primary function of a protective relay in a power distribution system?

Accepted Answer

Detecting and isolating faults

Answer

Regulating voltage levels

Answer

Improving power quality

Answer

Monitoring system performance

Question 27

When designing a power distribution system, which of the following is a key consideration?

Accepted Answer

Load demand forecasting

Answer

Environmental impact

Answer

Construction techniques

Answer

Material selection

Question 28

What is the main objective of voltage regulation in power distribution systems?

Accepted Answer

Maintaining a stable voltage supply to consumers

Answer

Reducing power losses

Answer

Preventing equipment damage

Answer

Increasing system efficiency