ITI Electrician Safety MCQ – Electrician Safety Objective Question & Answer

The symbol described—a lightning bolt within a yellow triangle—is a standard warning sign that indicates a risk of electric shock or high voltage.

Characteristics of the Warning Sign

1. Shape:
   • The triangular shape is universally recognized as a warning indicator. It is specifically designed to alert individuals to potential hazards.
2. Color:
   • Yellow Background: The bright yellow color is highly visible and is used to attract attention, signaling caution regarding the potential danger.
   • Lightning Bolt Symbol: The lightning bolt signifies electrical hazards, indicating the possibility of electric shock or high voltage.

Purpose of the Warning Sign

• Alertness: The primary purpose of this warning sign is to alert people to the presence of electrical hazards that require caution. It serves as a reminder to be aware of the risks associated with electricity.
• Safety Precautions: These signs are commonly found in various environments, such as electrical rooms, near high-voltage equipment, and on power lines, where there is a risk of electric shock.

An accident with very little damage is called Trivial.

Classes of Accidents

1. Near Accident:
   • Definition: Near accidents are incidents where an accident almost occurred but did not result in any damage or injury. These situations serve as warnings and highlight potential hazards that could lead to future accidents if not addressed.
   • Example: A vehicle swerves to avoid hitting a pedestrian who suddenly steps onto the road but manages to stop just in time.
2. Trivial:
   • Definition: Trivial accidents refer to incidents that result in very little damage or injury. These accidents are often considered insignificant and may not require any formal reporting.
   • Example: A minor scratch on a car from brushing against a fence.
3. Minor Accident:
   • Definition: Minor accidents involve damage and injuries that are more significant than trivial but still relatively low in severity. These incidents may require some medical attention but usually do not lead to serious consequences.
   • Example: A fender bender where vehicles sustain minor dents, and individuals experience minor bruises.
4. Serious Accident:
   • Definition: Serious accidents are characterized by heavy damage and numerous injuries. These incidents often require emergency services and can have significant impacts on individuals involved and the surrounding community.
   • Example: A multi-vehicle collision on a highway that results in significant property damage and several people needing hospitalization.
5. Fatal:
   • Definition: Fatal accidents involve very heavy damage, often resulting in loss of life. These incidents are the most severe class of accidents and have profound implications for victims, families, and communities.
   • Example: A catastrophic bus crash that leads to multiple fatalities and extensive damage to the vehicles involved.

The example of a cautionary sign (warning sign) from the options provided is Pedestrian crossing.

• Cautionary Sign: A pedestrian crossing sign is designed to alert drivers and pedestrians about the presence of a crosswalk where pedestrians may be crossing the road. It serves as a warning to drivers to slow down and be prepared to stop for pedestrians.

Analysis of Other Options:

• Stop: This is a regulatory sign that instructs drivers to come to a complete stop and is not classified as a cautionary sign.
• Overtaking prohibited: This is also a regulatory sign that prohibits overtaking in certain areas, rather than warning about potential hazards.
• Petrol pump: This is an informational sign indicating the location of a petrol station, not a warning sign.

According to the ABC of first aid, B stands for Breathing.

In first aid, “ABC” is a vital sequence followed when assisting an injured or unconscious person in an emergency.

• A – Airway: First, it’s essential to ensure the person’s airway is open so they can breathe. This means there should be no obstruction in the mouth and throat, such as the tongue or any foreign object.
• B – Breathing: Once the airway is open, it’s checked whether the person is breathing or not. If the person is not breathing, artificial respiration (such as mouth-to-mouth resuscitation) or CPR should be started immediately.
• C – Circulation: This refers to whether blood is flowing through the person’s body. If the person’s heart stops beating, attempts are made to maintain blood circulation through CPR.

The sign featuring the figures of two children walking is indeed a School Crossing Sign.

Characteristics of the School Crossing Sign

1. 1. Visual Elements:
      • The sign typically displays silhouettes or figures of two children walking, often accompanied by a bright yellow or fluorescent background. This design is intended to attract attention and convey the message clearly.
   2. Color:
      • Yellow Background: The bright yellow color is highly visible and is used to alert drivers to exercise caution in areas where children are likely to be present.
   3. Shape: The shape is typically a pentagon (five-sided) or a diamond shape. This distinct shape helps differentiate it from other traffic signs.

The part of workplace safety among the given options is Color code.

Importance of Color Codes in Workplace Safety

Color codes help ensure that employees and visitors can quickly identify hazards and understand safety protocols. By using standardized colors, organizations can create a safer work environment and reduce the risk of accidents.

Common Color Codes and Their Meanings

1. Red:
   • Meaning: Indicates danger or emergency.
   • Usage:
     • Fire-related equipment (e.g., fire extinguishers, fire alarms).
     • Hazardous materials (e.g., containers with flammable substances).
     • Emergency stop buttons or switches.
2. Yellow:
   • Meaning: Caution or warning.
   • Usage:
     • Potential hazards (e.g., slippery surfaces, uneven flooring).
     • Areas where caution is required, such as near machinery or moving vehicles.
3. Green:
   • Meaning: Safety or go.
   • Usage:
     • Emergency exits (indicating safe egress routes).
     • First aid stations (indicating where medical assistance is available).
     • Safety equipment (e.g., safety showers or eye wash stations).
4. Blue:
   • Meaning: Information or mandatory actions.
   • Usage:
     • Notices or bulletins (e.g., safety procedures, instructions).
     • Mandatory safety gear requirements (e.g., “Hard hats must be worn”).

The procedure of dousing fire by using blankets is called Smothering.

• Smothering: This method involves covering the fire with a blanket or similar material to cut off its oxygen supply, which is essential for combustion.
• By smothering the flames, the fire is effectively extinguished without the need for water or chemical extinguishers.

When a fire breaks out at the workplace, the required action is known by the acronym RACE, which stands for: Rescue, Alarm, Confine, Evacuate.

RACE Components:

1. Rescue:
   • This is the first step and involves ensuring the safety of individuals in immediate danger. It may include evacuating yourself and assisting others who may need help to exit the affected area.
2. Alarm :
   • Once individuals are safe, the next step is to alert others about the fire. This includes sounding alarms and notifying emergency services to ensure that help is on the way.
3. Confine:
   • After ensuring that people are safe and the alarm has been raised, the next step is to contain the fire as much as possible. This can involve closing doors and windows to prevent smoke from spreading and limiting the fire’s access to oxygen.
4. Evacuate:
   • The final step is to evacuate the area if necessary. This involves guiding everyone to safe exits and ensuring that all individuals leave the premises safely.

The severity of electrical shock injuries is influenced by several factors, including the amount of current passing through the body and the duration of exposure.

Current Levels and Effects on the Human Body

1. Current Range of 200 mA to 500 mA:
   • Exposure to electrical currents in this range can lead to certain death. At these levels, the risk of fatal arrhythmias (irregular heartbeats) and severe damage to vital organs increases significantly.
2. Current Up to 50 mA:
   • Currents around 50 mA can cause severe muscular contractions, which may lead to breathing difficulties. The involuntary muscle spasms can prevent individuals from escaping the source of electricity, increasing the risk of prolonged exposure.

The causes of accidents that occur while operating machines without knowledge, safety precautions, authority, or safety devices can be attributed to Human causes.

Human causes encompass a wide range of factors related to human behavior and decision-making that contribute to accidents. These include:

• Lack of knowledge: Operating machinery without proper training or understanding of its functions and hazards.
• Lack of safety precautions: Not following established safety procedures, such as using personal protective equipment (PPE), maintaining a safe distance, or locking out/tagging out equipment.
• Working without authority: Operating machinery without proper authorization or supervision.
• Disregarding safety devices: Bypassing or disabling safety devices like guards, interlocks, or emergency stop buttons.
• Distractions: Being distracted by conversations, cell phones, or other activities while operating machinery.
• Fatigue: Operating machinery when tired or fatigued, which can impair judgment and reaction time.