Electrical Hazards: Safety Measures and Risk Management

Question 1

When working with electricity, which action is considered an unsafe working practice?

Accepted Answer

Working without direct supervision

Answer

Wearing appropriate personal protective equipment (PPE)

Answer

Using insulated tools

Answer

Adhering to established electrical isolation procedures

Question 2

When selecting personal protective equipment (PPE) for electrical work, the primary factor to consider is:

Accepted Answer

Level of electrical hazard present

Answer

Cost-effectiveness

Answer

Comfort and convenience

Answer

Aesthetic appeal

Question 3

Which of the following is NOT a primary control measure for reducing the risk of electrical shock?

Accepted Answer

Using personal protective equipment (PPE)

Answer

Isolating electrical equipment

Answer

Grounding (Earthing)

Answer

Establishing safe working practices

Question 4

Which of the following is **NOT** a potential electrical hazard?

Accepted Answer

Exposure to extreme cold

Answer

Contact with live conductors

Answer

Overloading electrical circuits

Answer

Faulty electrical equipment

Question 5

What is the primary purpose of earthing an electrical system?

Accepted Answer

To provide a low-resistance path for fault currents

Answer

To prevent electrostatic discharge

Answer

To ensure the proper functioning of protective devices

Answer

To reduce the inductance of the circuit

Question 6

What is the recommended isolation procedure for electrical equipment?

Accepted Answer

Switch off the power, lock out, and tag the equipment

Answer

Use a voltmeter to check for voltage before touching the equipment

Answer

Depress the emergency stop button

Answer

Inform a supervisor and wait for further instructions

Question 7

What is the primary function of a residual current device (RCD)?

Accepted Answer

To detect and interrupt current leakage

Answer

To isolate equipment in case of a fault

Answer

To provide overcurrent protection

Answer

To earth electrical systems

Question 8

Which of the following is a type of personal protective equipment (PPE) used when working with electricity?

Accepted Answer

Insulated gloves

Answer

Safety glasses

Answer

Steel-toed boots

Answer

Hard hat

Question 9

Which of the following is NOT a type of Personal Protective Equipment (PPE) for working with electricity?

Accepted Answer

Ear plugs

Answer

Insulated gloves

Answer

Safety glasses

Answer

Protective suit

Question 10

When working with ladders near overhead power lines, what is the minimum recommended distance to maintain for safety?

Accepted Answer

5 meters

Answer

1 meter

Answer

3 meters

Answer

10 meters

Question 11

When working with electricity, which of the following is an unsafe practice?

Accepted Answer

Working on live electrical circuits

Answer

Using insulated tools and wearing PPE

Answer

Double-checking connections and grounding

Answer

Being cautious in wet environments

Question 12

Describe the sequential steps involved in conducting a comprehensive risk assessment for electrical safety in the workplace.

Accepted Answer

Identify electrical hazards, assess risks, and implement control measures.

Answer

Measure electrical parameters (current, voltage, resistance).

Answer

Inspect electrical equipment and wiring for damage.

Answer

Train employees on electrical safety measures.

Question 13

Which PPE is designed to protect the wearer's head and face from electrical hazards?

Accepted Answer

Safety helmet with visor

Answer

Insulated gloves

Answer

Rubber boots

Answer

Earplugs

Question 14

Which of the following precautions should **NOT** be taken when working with live electrical circuits?

Accepted Answer

Working alone

Answer

Testing the circuit for live voltage before working on it

Answer

Using insulated tools

Answer

Wearing appropriate personal protective equipment (PPE)

Question 15

What is the initial step in isolating electrical equipment for maintenance?

Accepted Answer

Switch off the power supply at the main isolation point

Answer

Test the equipment using a multimeter

Answer

Tag the equipment with a warning notice

Answer

Lock out the isolation point and display a warning notice

Question 16

Which of the following electrical hazards poses a risk of electrocution due to contact with live conductors?

Accepted Answer

Live wires

Answer

Electrical noise

Answer

Magnetic fields

Answer

Arc flash

Question 17

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

Accepted Answer

To protect against electric shock by detecting current imbalances between live and neutral conductors

Answer

To prevent overloading of electrical circuits

Question 18

Which of the following is an early indicator that electrical equipment may require maintenance?

Accepted Answer

Loose or damaged connections

Answer

No visible signs of damage

Answer

Appearing clean and well-maintained

Answer

Operating at a lower temperature than usual

Question 19

What is the leading cause of electrical fires in buildings?

Accepted Answer

Overloaded circuits

Answer

Static electricity

Answer

Arcing faults

Answer

Lightning strikes

Question 20

What is the primary function of a residual current device (RCD)?

Accepted Answer

To detect and interrupt the flow of current in the event of an earth fault

Answer

To protect against overloads and short circuits

Answer

To provide isolation for electrical equipment

Question 21

What is the main objective of electrical isolation?

Accepted Answer

To prevent electric current from passing through the human body.

Answer

To enhance the performance of electrical equipment.

Answer

To improve power efficiency.

Question 22

Which of the following is a fundamental electrical safety practice?

Accepted Answer

Ensuring proper grounding of equipment.

Answer

Using damaged electrical cords.

Answer

Working on live electrical components without protective gear.

Answer

Ignoring warning signs and labels.

Question 23

What is the recommended tripping current for Earth Leakage Circuit Breakers (ELCBs) to protect against electrical shock?

Accepted Answer

30 milliamperes (mA)

Answer

50 mA

Answer

100 mA

Answer

200 mA

Question 24

What is a major contributor to electrical fires?

Accepted Answer

Overloading electrical circuits

Answer

Using extension cords safely

Answer

Regular electrical inspections

Answer

Properly maintained electrical equipment

Question 25

What is the primary legal responsibility of employers regarding electrical hazards in the workplace?

Accepted Answer

To provide adequate training and protective equipment to employees.

Answer

To delegate electrical safety responsibilities entirely to employees

Answer

To solely rely on personal protective equipment for employee safety.

Question 26

Which of the following is NOT a legal requirement for electrical installations?

Accepted Answer

Using visually appealing components

Answer

Regular maintenance and testing

Answer

Compliance with relevant electrical standards and codes

Answer

Proper labeling and documentation.

Question 27

What is the primary function of a Residual Current Device (RCD)?

Accepted Answer

To detect and interrupt electrical circuits in the event of earth leakage.

Answer

To improve the energy efficiency of electrical systems.

Answer

To isolate electrical circuits during maintenance

Answer

To prevent overcurrent

Question 28

What is a potential consequence of an electrical arc flash?

Accepted Answer

Severe burns and other injuries

Answer

Improved productivity

Answer

Enhanced equipment performance

Answer

Minor discomfort

Question 29

How often should electrical equipment be maintained?

Accepted Answer

According to the manufacturer's recommended intervals

Answer

Only when breakdowns occur

Answer

Monthly

Answer

Annually

Question 30

Which of the following is the correct sequence of steps in the isolation procedure for an electrical circuit?

Accepted Answer

Isolate, prove dead, earth, and lock out

Answer

Switch off, prove live, and earth

Answer

Isolate, prove live, earth, and tag

Answer

Switch off and lock out only

Question 31

What type of personal protective equipment (PPE) is essential when working on live electrical equipment?

Accepted Answer

Insulated gloves and tools

Answer

Cotton overalls and leather boots

Answer

Welding gloves and apron

Answer

Safety glasses and hard hat

Question 32

What is the primary function of an earth wire?

Accepted Answer

To provide a low-resistance path to ground and dissipate fault currents

Answer

To store electricity

Answer

To connect electrical equipment

Answer

To prevent overloads

Question 33

Which of the following is a common cause of electrical fires in domestic environments?

Accepted Answer

Overloaded circuits or faulty wiring

Answer

Lightning strikes

Answer

Water damage

Answer

Natural gas leaks

Question 34

If you witness someone receiving an electric shock, what should be your immediate action?

Accepted Answer

Call for emergency assistance and do not touch the person

Answer

Immediately grab the person and pull them away

Answer

Use a wooden pole to push the person away from the source

Question 35

What is a key purpose of electrical bonding and equipotential bonding in electrical installations?

Accepted Answer

To minimize the risk of electric shock by ensuring that all conductive surfaces are at the same electrical potential

Answer

To improve circuit efficiency

Answer

To prevent corrosion

Answer

To increase power consumption

Question 36

Which of the following is a potential electrical hazard in an electrical installation?

Accepted Answer

Exposed and accessible live wires

Answer

Adequate ventilation

Answer

Proper earthing

Question 37

Which of the following is NOT a safe working practice when working with electricity?

Accepted Answer

Touching live wires with bare hands

Answer

Using insulated tools

Answer

Testing for live wires before working on them

Answer

Wearing proper protective clothing

Question 38

What is the purpose of electrical isolation?

Accepted Answer

To prevent electric shock by isolating live conductors from personnel and equipment

Answer

To improve electrical efficiency

Answer

To prevent power surges

Question 39

Which of the following is a common cause of electrical fires in the workplace?

Accepted Answer

Overloaded circuits

Answer

Natural gas leaks

Answer

Lightning strikes

Answer

Arson

Question 40

What is the recommended minimum distance to maintain from overhead power lines when working with ladders or other elevated equipment?

Accepted Answer

5 meters

Answer

10 meters

Answer

The distance does not matter

Answer

1 meter

Question 41

What is the first step to take when responding to an electrical accident?

Accepted Answer

Ensure the safety of yourself and others

Answer

Attempt to rescue the victim

Answer

Call for emergency services

Answer

Turn off the power source

Question 42

Which of the following is a personal protective equipment (PPE) item recommended for working with electricity?

Accepted Answer

Rubber gloves

Answer

Hard hat

Answer

Safety glasses

Answer

Steel-toe boots

Question 43

What is the purpose of grounding in electrical systems?

Accepted Answer

To provide a safe path for fault currents to return to the source

Answer

To prevent electrical fires

Answer

To improve the efficiency of electrical circuits

Question 44

Which of the following is a potential consequence of electrical shock?

Accepted Answer

Cardiac arrest

Answer

Sprains

Answer

Paper cuts

Answer

Sunburn

Question 45

What is the recommended action to take if you suspect an electrical fault?

Accepted Answer

Report it to a qualified electrician immediately

Answer

Ignore it and hope it goes away

Answer

Call the fire department

Answer

Try to fix it yourself