Safety MCQ Quiz - Objective Question with Answer for Safety - Download Free PDF

Explanation:

Industrial safety:

• Industrial safety is a crucial aspect of any manufacturing or production environment. It encompasses a range of practices, protocols, and measures aimed at ensuring the well-being of workers, protecting equipment, and maintaining a safe working environment. The main goals of industrial safety are to prevent accidents, reduce health risks, and minimize damage to both personnel and property. Let's delve into the importance of industrial safety and analyze why the incorrect option in the given statement is indeed incorrect.

Prevention of health issues and accident of workers

• One of the primary goals of industrial safety is to prevent health issues and accidents among workers. By implementing safety protocols such as the use of personal protective equipment (PPE), conducting regular safety training, and ensuring that safety regulations are followed, industries can create a safer working environment. This reduces the risk of accidents and health-related issues, which in turn helps in maintaining a healthy and productive workforce.

Increasing the production rate

• Industrial safety measures can indirectly contribute to increasing the production rate. When workers feel safe and are protected from potential hazards, they are likely to be more productive and focused on their tasks. Additionally, maintaining machinery and equipment in good working condition through regular safety checks can prevent breakdowns and downtime, leading to more efficient production processes.

Decreasing the damage to the property of industry

• Industrial safety measures are designed to protect not only the workers and machinery but also the overall property of the industry. Implementing fire safety protocols, ensuring proper storage of hazardous materials, and conducting regular safety inspections can prevent incidents that could cause significant damage to the industrial property. This helps in maintaining a safe and secure working environment, ultimately contributing to the smooth operation of the industry.

Explanation:

Class D Fires

• Class D fires involve combustible metals. These types of fires are particularly dangerous and challenging to extinguish due to the chemical properties and high burning temperatures of the metals involved. Common metals that fall under this category include aluminum, magnesium, titanium, and zirconium.

Characteristics of Combustible Metals:

• High Burning Temperatures: Combustible metals burn at extremely high temperatures, which can exceed 5,000 degrees Fahrenheit. This makes them difficult to extinguish with water or standard fire extinguishers.
• Reactivity with Water: Many combustible metals react violently with water, producing flammable hydrogen gas and potentially causing explosions. Therefore, using water to extinguish a Class D fire can exacerbate the situation.
• Specialized Extinguishing Agents: Class D fires require specific extinguishing agents, such as dry powders designed to absorb heat and smother the fire. These agents are formulated to prevent the metal from reacting with oxygen and spreading the fire.

Common Combustible Metals:

• Aluminum: Commonly used in manufacturing and construction, aluminum can ignite when subjected to high temperatures or friction. Once ignited, it burns intensely and can be difficult to control.
• Magnesium: Found in automotive parts, aircraft, and some consumer products, magnesium burns with a bright white flame and reacts violently with water.
• Titanium: Used in aerospace and medical applications, titanium burns at high temperatures and is challenging to extinguish using conventional methods.
• Zirconium: Found in some industrial processes and specialized equipment, zirconium is highly flammable and requires careful handling to prevent fires.

The correct answer for the given question is Global warning (Risk of Danger).

Warning Signs:

These signs should be used to make people aware of a nearby danger. For example, a flammable liquid store or a laboratory where radioactive substances are in use should have an appropriate warning sign near the entrance.

The correct answer for the given question is Risk of Electric shock.

Warning Signs:

These signs should be used to make people aware of a nearby danger. For example, a flammable liquid store or a laboratory where radioactive substances are in use should have an appropriate warning sign near the entrance.

Explanation:

In older days road locomotive carrying a red flag by day and red lantern by night. Safety is the prime motive of every traffic.

• Kinds of road signs

1. Mandatory
2. Cautionary and
3. Informatory

Mandatory sign 

• Violation of mandatory signs can lead to penalties. Ex. Stop, give way limits, prohibited, no parking, and compulsory sign.

Cautionary signs 

• Cautionary/ warning signs are especially safe. Do's and don'ts for pedestrians, cyclists, bus passengers, and motorists.
• The cautionary traffic sign is of Triangular shape

Information signs

• Information signs are especially beneficial to the passengers and two-wheelers.
• The Information traffic sign is of Rectangular shape

Explanation:

Explanation:

Explanation:

• A fire extinguisher, flame extinguisher or simply extinguisher is an active fire protection device used to extinguish or control small fires, often in emergency situations.
• It is not intended for use on and out off control fire. 
• Many types of fire extinguishers are available with different extinguishing 'agents' to deal with different classes of fires. 

Carbon dioxide (CO2):

• This type is easily distinguished by the distinctively shaped discharge horn.
• Suitable for class B fires
• Best suited where contamination by deposits must be avoided.
• Not generally effective in the open air.
• If the nozzle gets extremely cold, then it is dangerous to use that Extinguisher.
• CO₂ extinguishers have Black labels on the top of the cylinder

Water-filled extinguishers 

• There are two methods of operation.
  1. Gas cartridge type
  2. Stored pressure type
• Water-filled extinguishers have Red labels on the top of the cylinder

Foam extinguishers:

• These may be of stored pressure or gas cartridge types.
• Foam extinguishers are most suitable for:
  1. flammable liquid fires
  2. running liquid fires
• Must not be used where electrical equipment is involved.
• Foam extinguishers have Cream labels on the top of the cylinder

Dry powder extinguishers:

• Extinguishers fitted with dry powder may be of the gas cartridge or stored pressure type.
• The main distinguishing feature is the fork-shaped nozzle.
• Powders have been developed to deal with class D fires. 
• Dry powder extinguishers have Blue labels on the top of the cylinder

Halon extinguishers:

• These extinguishers may be filled with carbon tetrachloride (CTC) and bromochlorodifluoro methane (BCF).
• They may be of the either gas cartridge or stored pressure type.
• They are more effective in extinguishing small fires involving pouring liquids.
• These extinguishers are particularly suitable and safe to use on electrical equipment as the chemicals are electrically non-conductive.

Explanation:

Explanation:

• Loose connections, wrongly rated fuses, overload circuits i.e. misuse or negligence in electrical equipment, cause overheating which may, in turn, lead to a fire. 
• Class C type fire extinguishers can be used for electrical fires. While the extinguishment of an electrical fire,
  • If possible, remove the source of energy by unplugging or disconnecting the electrical equipment
  • Use carbon dioxide, ordinary (BC rated) dry chemical, multi-purpose dry chemical and halon fire extinguishers
  • Do not use water on any energized electrical equipment

A fire extinguisher, flame extinguisher or simply extinguisher is an active fire protection device used to extinguish or control small fires, often in emergency situations.It is not intended for use on and out of control fire. 

Many types of fire extinguishers are available with different extinguishing 'agents' to deal with different classes of fires. 

Foam extinguishers:

These may be of stored pressure or gas cartridge types.

Foam extinguishers are most suitable for:

• flammable liquid fires
• running liquid fires

Must not be used where electrical equipment is involved.

Important Points

Water-filled extinguishers 

There are two methods of operation.

• Gas cartridge type
• Stored pressure type

Dry powder extinguishers:

• Extinguishers fitted with dry powder may be of the gas cartridge or stored pressure type.
• The main distinguishing feature is the fork-shaped nozzle.
• Powders have been developed to deal with class D fires. 

Carbon dioxide (CO2):

• This type is easily distinguished by the distinctively shaped discharge horn.
• Suitable for class B fires
• Best suited where contamination by deposits must be avoided.
• Not generally effective in the open air.
• If the nozzle gets extremely cold, then it is dangerous to use that Extinguisher.

Halon extinguishers:

• These extinguishers may be filled with carbon tetrachloride (CTC) and bromochlorodifluoro methene (BCF).
• They may be of either gas cartridge or stored pressure type.
• They are more effective in extinguishing small fires involving pouring liquids.
• These extinguishers are particularly suitable and safe to use on electrical equipment as the chemicals are electrically non-conductive.

Explanation:

Class A :

• This is suitable for cloth, wood, rubber, paper, various plastics, and regular combustible fires. 
• Class A fire extinguishers are designed to put out fires that have started from household items that are made out of materials that will quickly ignite. These materials include paper products and furniture made from wood. 
• The Type A fire extinguisher contains water. The letter A stands for ash. A fire that burns from household items will leave ashes. 

Class B :

• This is suitable for grease, gasoline or oil-based fire is usually filled with a dry chemical. 
• Class B fire extinguishers are used to put out fires that have started from highly flammable liquids. These liquids include any type of lacquer or oil-based paint products, paint thinners and lacquer thinners, oils, and gasoline. 
• The letter B represents a barrel. Most of these chemicals are transported in a barrel-like container.

Class C :

• This is suitable for electrical fires caused by appliances, tools and other plugged in gear. It can contain either halon or CO2. Halon is expensive and depletes the ozone layer and its use is restricted. 
• Class C fire extinguishers are used to put out fires that have started from an electrical source. The source could be from appliances, lighting or your electrical system.
• This extinguisher uses carbon dioxide to put out the fire. Carbon dioxide will basically remove the oxygen from the air around the fire. Carbon dioxide is also used in some Type B extinguishers. 

Class D:

• This is used for water-reactive metals such as burning magnesium and will be located in factories using such metals. 
• Class D extinguishers are used to put out fires on metals that are capable of burning. These types of metals are found in the manufacturing industry only. This extinguisher uses a dry powder to put out the fire.

Class K :

• This contains a special purpose wet chemical agent for use in kitchen fires and deep fryers to stop fires started by vegetable oils, animal fats, or other fats started in cooking appliances.

Explanation:

• A fire extinguisher, flame extinguisher or simply extinguisher is an active fire protection device used to extinguish or control small fires, often in emergency situations.
• It is not intended for use on and out off control fire. 
• Many types of fire extinguishers are available with different extinguishing 'agents' to deal with different classes of fires. 

Water-filled extinguishers 

• There are two methods of operation.
  1. Gas cartridge type
  2. Stored pressure type
• Water-filled extinguishers have Red labels on the top of the cylinder

Additional Information

Carbon dioxide (CO2):

• This type is easily distinguished by the distinctively shaped discharge horn.
• Suitable for class B fires
• Best suited where contamination by deposits must be avoided.
• Not generally effective in the open air.
• If the nozzle gets extremely cold, then it is dangerous to use that Extinguisher.
• CO2 extinguishers have Black labels on the top of the cylinder

Foam extinguishers:

• These may be of stored pressure or gas cartridge types.
• Foam extinguishers are most suitable for:
  1. flammable liquid fires
  2. running liquid fires
• Must not be used where electrical equipment is involved.
• Foam extinguishers have Cream labels on the top of the cylinder

Dry powder extinguishers:

• Extinguishers fitted with dry powder may be of the gas cartridge or stored pressure type.
• The main distinguishing feature is the fork-shaped nozzle.
• Powders have been developed to deal with class D fires. 
• Dry powder extinguishers have Blue labels on the top of the cylinder

Halon extinguishers:

• These extinguishers may be filled with carbon tetrachloride (CTC) and bromochlorodifluoro methane (BCF).
• They may be of the either gas cartridge or stored pressure type.
• They are more effective in extinguishing small fires involving pouring liquids.
• These extinguishers are particularly suitable and safe to use on electrical equipment as the chemicals are electrically non-conductive.

Explanation:

Fire:

• Fire is the burning of combustible material.
• A fire in an unwanted place and on an unwanted occasion and in uncontrollable quantity can cause damage or destroy property and materials.

The factors that control fire:

Fuel:

• Any substance, liquid, solid, or gas will burn if given oxygen and a high enough temperature.

Heat:

• Every fuel will begin to burn at a certain temperature.
• Solids and liquids give off vapor when heated and it is this vapor which ignites.
• Some liquids give off vapor even at normal room temperature say 15° C, e.g. petrol.

Oxygen:

• Usually, it exists in sufficient quality in the air to keep a fire burning.

Extinguishing of fires:

Isolating or removing any of these factors from the combination will extinguish the fire. There are three basic ways of achieving this:

1. Starving the fire of fuel by removing the fuel in the vicinity of the fire.
2. Smothering, i.e. by isolating the fire from the supply of oxygen by blanketing it with foam, sand, etc.
3. Cooling, i.e. by using water to lower the temperature, i.e. by removing heat.

Explanation:

• A fire extinguisher, flame extinguisher or simply extinguisher is an active fire protection device used to extinguish or control small fires, often in emergency situations.

Water-filled extinguishers 

• There are two methods of operation.
  1. Gas cartridge type
  2. Stored pressure type
• Water-filled extinguishers have Red labels on the top of the cylinder.

Extinguishers to be refilled for performance tests in an annually cyclic manner. 

1. Once in Two years
   • Portable fire extinguisher, Water-type stored pressure
   • Portable fire extinguisher, Mechanical foam type stored pressure
   • 135-liter fire engine, Foam type.
2. Once in Three years
   • BC and ABC powder extinguisher confirming to IS 4308 and IS 14609 resp.
3. Once in Five years
   • Portable fire extinguisher, Water type 9 liter (gas cartridge)
   • Portable fire extinguisher, Mechanical foam type 9 liter (cartridge type)
   • Portable fire extinguisher, Water type 50 liter (gas cartridge)
   • Portable fire extinguisher, Mechanical foam type 50 liter (cartridge type)
   • Fire extinguisher, Carbon dioxide type (portable and trolley mounted)
   • Higher capacity dry powder fire extinguisher (trolley mounted)
   • Dry powder fire extinguisher for metal fires
   • Clean agent fire extinguisher.