ITI Electrician Safety MCQ – Electrician Safety Objective Question & Answer

Answer: "Danger, Response, Airway, Breathing "

In medical first aid, the acronym DRAB stands for Danger, Response, Airway, Breathing

1. Danger :
   • This step involves assessing the scene for any immediate dangers to yourself, the casualty, or bystanders. Ensuring safety is the priority before approaching the casualty.
2. Response :
   • Check if the casualty is responsive. You can do this by asking them a loud question or gently shaking their shoulders to see if they react.
3. Airway:
   • If the casualty is unresponsive, it’s crucial to open their airway. This can be done by tilting their head back and lifting their chin to ensure there are no obstructions.
4. Breathing:
   • After ensuring the airway is clear, check for breathing. Look for signs of normal breathing for about 10 seconds. If the casualty is not breathing or breathing abnormally, you may need to perform CPR.

Answer: "Dry powder fire extinguisher "

• The type of fire extinguisher that features a fork-shaped nozzle is the dry powder fire extinguisher.

• This nozzle design is specifically developed to effectively disperse the powder used in these extinguishers, allowing for better coverage and extinguishing capabilities across various classes of fires, including those involving flammable gases and metals. This design helps to:
  • Disperse the powder widely: The forked nozzle spreads the dry powder in a fan-like pattern, covering a larger area more quickly.
  • Prevent clogging: The design helps to prevent the powder from clumping or clogging within the nozzle.

Answer: "Use of vaporing liquids "

The most appropriate method for extinguishing a fire involving electrical equipment is indeed the use of non-conductive agents, which can include vaporizing liquids. Here’s a more detailed breakdown:

Vaporizing Liquids

• Description: Vaporizing liquids, such as Halon and Halocarbons, are designed to extinguish fires by displacing oxygen and cooling the fire without conducting electricity.
• Effectiveness: These agents are effective on electrical fires because they do not leave residues that could damage sensitive electronic equipment.
• Environmental Concerns: While Halon is effective, it has been largely phased out due to its ozone-depleting properties. Halocarbons are now more commonly used as alternatives.

Note:- While vaporizing liquids are indeed effective for electrical fires, it’s essential to recognize that CO2 extinguishers are also widely recommended and used in practice. Both options serve important roles in safely extinguishing electrical fires without risking electric shock or damaging equipment.

Answer: "Self discipline "

The word “SHITSUKE” in the 5S approach to workshop cleaning and maintenance is best described as self-discipline (option c).

• Definition: Shitsuke refers to the discipline required to sustain the improvements made through the first four S’s (Seiri, Seiton, Seiso, and Seiketsu) and to ensure that these practices become habitual in the workplace.
• Role in 5S: It emphasizes the importance of maintaining standards and fostering a culture of discipline among employees to adhere to the established rules and practices. This self-discipline is crucial for the long-term success of the 5S methodology, making it an integral part of continuous improvement in the workplace.

The 5S Steps

 

Step 1: SEIRI (Sort)

• Description: This step involves sorting through all items in the workspace and removing unnecessary items. The goal is to distinguish between what is essential and what is not.
• Outcome: A clutter-free environment that allows for easier access to necessary tools and materials.

Step 2: SEITON (Set in Order)

• Description: After sorting, the next step is to organize the remaining items. This means arranging tools and materials in a way that makes them easy to find and use.
• Outcome: An orderly workspace where everything has a designated place, reducing time spent searching for items.

Step 3: SEISO (Shine)

• Description: This step focuses on cleaning the workspace. It involves not only cleaning surfaces but also maintaining equipment to ensure everything is in good working condition.
• Outcome: A clean and safe working environment that promotes efficiency and reduces the risk of accidents.

Step 4: SEIKETSU (Standardize)

• Description: Standardization involves creating guidelines and procedures to maintain the first three S’s. This includes documenting processes and establishing best practices.
• Outcome: Consistent practices across the workplace that ensure ongoing organization and cleanliness.

Step 5: SHITSUKE (Sustain or Self-discipline)

• Description: The final step emphasizes the importance of discipline in adhering to the standards set in the previous steps. It encourages individuals to take responsibility for maintaining their organized workspace.
• Outcome: A culture of continuous improvement where employees are committed to sustaining the gains achieved through the 5S process.

Answer: "First 60 minutes "

• The “golden hour” in trauma care, especially for head injuries, refers to the first 60 minutes after the injury occurs.
• This is the time frame during which immediate medical attention is most crucial to prevent further damage and improve the chances of survival.
• Delays beyond this period can lead to increased morbidity and mortality, especially in cases involving severe trauma like head injuries

Answer: "Mandatory sign "

Mandatory safety signs indicates actions that must be taken, are characterized by a blue circle with a white pictogram (symbol) or text in the center. These signs prescribe specific behaviors or the use of personal protective equipment (PPE). For example, a sign showing a hand wearing gloves within a blue circle mandates the wearing of hand protection.

• Blue Circle: This is the key identifier for mandatory signs. It immediately signals that a specific action is required.
• White Pictogram/Text: The white symbol or text provides a clear and easily understandable instruction. Pictograms are especially helpful because they can be understood regardless of language.
• Mandate: The essential function of these signs is to enforce compliance. They are not merely warnings or suggestions; they are directives.

Answer: "both prevent leakage of current and prevent shock "

The insulation on a current-carrying conductor is primarily provided to prevent leakage of current and prevent shock.

1. Prevent Leakage of Current: Insulation provides a high resistance path, preventing current from flowing outside the intended conductor. This ensures that the current flows only through the circuit it’s designed for, maximizing efficiency and preventing wasted energy.
2. Prevent Shock: By containing the current within the conductor, insulation prevents accidental contact with the live wire. Insulation also acts as a protective barrier for individuals, reducing the risk of electric shock when touching the conductor. This is especially important in environments where people may come into contact with electrical wiring.

Answer: "All these "

Each of the options listed represents a significant electrical hazard:

1. Damaged insulation on wires and broken plugs:
   • Damaged insulation can expose live wires, leading to electric shocks or short circuits. Broken plugs can also create unsafe connections that may result in electrical fires or shocks.
2. Overloaded circuits:
   • Overloading circuits occurs when too many devices are connected to a single circuit, which can cause overheating, arcing, and potentially lead to fires.
3. Flammable materials near electrical equipment:
   • Having flammable materials close to electrical equipment increases the risk of fire, especially if there is a fault or overheating in the electrical system.

Answer: "68 "

For underwater applications, an electrical light fitting must be completely protected against water ingress, even when submerged. The IP (Ingress Protection) rating indicates the level of protection against solids and liquids.

Structure of IP Rating

• First Digit: This digit indicates the level of protection against solid objects (such as dust). It can range from 0 to 6:

• • 0: No protection
  • 1: Protection against solid objects larger than 50 mm
  • 2: Protection against solid objects larger than 12.5 mm
  • 3: Protection against solid objects larger than 2.5 mm
  • 4: Protection against solid objects larger than 1.0 mm
  • 5: Limited protection against dust (dust ingress is limited)
  • 6: Totally dust-tight

• Second Digit: This digit indicates the level of protection against liquids (such as water). It can range from 0 to 9:

• • 0: No protection
  • 1: Protection against vertically falling water drops
  • 2: Protection against water drops falling at a specific angle
  • 3: Protection against rain or spray
  • 4: Protection against splashing water from all directions
  • 5: Protection against water jets (low pressure)
  • 6: Protection against powerful water jets or seawater
  • 7: Protection against temporary immersion in water
  • 8: Protection against continuous immersion in water
  • 9: Protection against high-pressure and high-temperature water jets

Answer: "Current flowing through the human body "

The magnitude of electric shock on the human body primarily depends on Current flowing through the human body.

• Current Flow: The amount of electric current that flows through the body is the most critical factor determining the severity of an electric shock. Higher currents can lead to more severe physiological effects, including muscle contractions, respiratory arrest, and cardiac issues.
• Voltage Influence: Voltage is the “pressure” that drives the current, While voltage (line voltage) is important as it can influence how much current flows through the body (according to Ohm’s Law), it is ultimately the current that has the most direct impact on the body’s response to electric shock.
• Resistance: The body’s resistance also plays a role, as it determines how much current will flow for a given voltage. However, the specific current flowing through the body is what directly affects the physiological outcomes.