Electrical Hazards: Comprehensive Learning Quizzes for Health and Safety

Question 1

What is the primary characteristic of an electrical shock?

Accepted Answer

Involuntary muscle contractions due to electrical contact

Answer

Severe burns caused by high-voltage electricity

Answer

A sudden energy release leading to fire or explosion

Question 2

What should you do immediately if you witness an electrical fire?

Accepted Answer

Call the fire department and evacuate the area

Answer

Attempt to extinguish the fire yourself

Answer

Use water to put out the fire

Answer

Ignore it and hope it goes out on its own

Question 3

Which type of personal protective equipment (PPE) provides the most effective protection against electrical shock?

Accepted Answer

Insulated gloves with a voltage rating appropriate for the electrical hazard

Answer

Safety glasses

Answer

Hard hat

Answer

Hearing protection

Question 4

Which of the following is not a common method used to control electrical hazards?

Accepted Answer

Increasing the voltage of electrical systems

Answer

Guarding live parts

Answer

Providing personal protective equipment (PPE)

Answer

Providing adequate training

Question 5

What is the primary purpose of an earth leakage circuit breaker (ELCB)?

Accepted Answer

Detects and interrupts current leakage to the ground

Answer

Protects against overloads and short circuits

Answer

Provides insulation from electrical shocks

Answer

Prevents electrostatic discharge

Question 6

What is the appropriate immediate action to take if an electrical appliance catches fire?

Accepted Answer

Unplug the appliance and use a fire extinguisher

Answer

Attempt to extinguish the fire with water

Answer

Leave the room and call the emergency services

Answer

Try to smother the fire with a blanket

Question 7

Which of the following is not a recognized type of electrical hazard?

Accepted Answer

Chemical spillage

Answer

Electrical shock

Answer

Burns

Answer

Explosions

Question 8

Which practice is not considered safe when working with electricity?

Accepted Answer

Touching electrical equipment with wet hands

Answer

Regular equipment inspections

Answer

Use of double insulation

Answer

Adhering to manufacturer's instructions

Question 9

Differentiate between a conductor and an insulator.

Accepted Answer

Conductors facilitate the flow of electricity, while insulators do not

Answer

Insulators facilitate the flow of electricity, while conductors do not

Answer

Conductors are composed of metal, while insulators are composed of plastic

Answer

Insulators are composed of metal, while conductors are composed of plastic

Question 10

Which of the following is NOT a common cause of electrical shock?

Accepted Answer

Falling debris

Answer

Contact with live wires

Answer

Defective equipment

Answer

Wet conditions

Question 11

Which type of electrical explosion involves the rapid release of energy due to a fault in an electrical system?

Accepted Answer

Arc flash

Answer

Thermal runaway

Answer

Dust explosion

Answer

Gas explosion

Question 12

Which type of extinguisher is most commonly used to extinguish an electrical fire?

Accepted Answer

Dry chemical extinguisher

Answer

Water

Answer

CO2 extinguisher

Answer

Foam extinguisher

Question 13

What should be the first step when responding to an electrical incident?

Accepted Answer

Turn off the power source

Answer

Call for emergency help

Answer

Check the victim's breathing

Answer

Start CPR

Question 14

What is the purpose of an earth leakage circuit breaker?

Accepted Answer

To protect against electric shock

Answer

To prevent fires

Answer

To stop explosions

Answer

To indicate the presence of electrical current

Question 15

What is the unit of measurement for electrical resistance?

Accepted Answer

Ohm

Answer

Ampere

Answer

Volt

Answer

Watt

Question 16

What type of equipment is used to measure electrical current?

Accepted Answer

Ammeter

Answer

Voltmeter

Answer

Ohmmeter

Answer

Power meter

Question 17

Identify the factor that does NOT contribute to electrical shock.

Accepted Answer

Exposure to dry conditions

Answer

Exposure to live wires

Answer

Elevated voltage levels

Answer

Contact with earthed metallic objects

Question 18

What is the primary function of an earth wire?

Accepted Answer

Provide an alternative current path during fault conditions

Answer

Enhance electrical circuit conductivity

Answer

Prevent electrical fires

Answer

Protect against voltage surges

Question 19

Which of the following is a common cause of electrical shock?

Accepted Answer

Contact with live wires

Answer

Dry surfaces

Answer

Lightning strikes

Answer

Intact insulation

Question 20

What is the primary difference between a fuse and a circuit breaker?

Accepted Answer

A fuse melts and breaks the circuit permanently, while a circuit breaker trips and can be reset.

Answer

A fuse is designed for low amperage circuits, while a circuit breaker is used for high amperage circuits.

Answer

A fuse is less expensive than a circuit breaker.

Question 21

What is the purpose of earthing in an electrical system?

Accepted Answer

To provide a low-resistance path for fault currents to the ground, ensuring the safe operation of the system.

Answer

To protect against overloads

Answer

To increase the voltage of the system

Question 22

What is the main purpose of a residual current device (RCD)?

Accepted Answer

To detect imbalances in the flow of current between live and neutral conductors and trip the circuit to prevent electrocution.

Answer

To isolate faulty circuits

Answer

To protect against overcurrents

Question 23

What is the primary cause of electrical shock?

Accepted Answer

Contact with live electrical components

Answer

Overloading electrical outlets

Answer

Improperly grounded equipment

Answer

Using electrical appliances in wet conditions

Question 24

Which type of electrical burn is caused by an electrical arc?

Accepted Answer

Electrical flash burn

Answer

Contact burn

Answer

Low-voltage burn

Answer

High-voltage burn

Question 25

Which of the following factors can increase the risk of electrical explosions?

Accepted Answer

Presence of flammable materials near electrical equipment

Answer

Properly grounded equipment

Answer

Regular maintenance of electrical systems

Question 26

What are the immediate actions you should take if you witness someone receiving an electrical shock?

Accepted Answer

Turn off the power supply and call for emergency services

Answer

Attempt to pull the person away from the electrical source

Answer

Pour water on the person

Question 27

Which of the following is an effective measure for preventing electrical accidents in the workplace?

Accepted Answer

Implementing a comprehensive electrical safety program

Answer

Relying solely on warning signs

Answer

Allowing untrained individuals to perform electrical work

Question 28

What is the main purpose of a risk assessment in electrical hazard management?

Accepted Answer

To identify potential electrical hazards and develop appropriate control measures

Answer

To estimate the likelihood and severity of electrical accidents

Answer

To eliminate all electrical hazards

Question 29

What is the purpose of color-coding electrical wires?

Accepted Answer

To indicate the function or voltage of the wire

Answer

To reduce the risk of electrical shock

Answer

To enhance the aesthetic appeal of the wiring

Answer

To make it easier to trace wires