Occupational Health & Safety Quiz
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Questions and Answers

What is the frequency rate for a company with 625 workers, each working for 48 hours per week for a duration of 50 weeks and had 30 lost-time injuries in the year 2018?

20

What colours are used on safety signs for firefighting equipment?

Black pictogram on a yellow background

Which is the most effective way to control hazards?

  • Personal Protective Equipment
  • Administrative Controls
  • Engineering Controls (correct)
  • Hazard Elimination
  • As per IS 3786, what is the equivalent Man Days Lost for loss of four fingers in one hand?

    <p>2400</p> Signup and view all the answers

    As per factories act, safety committee to be constituted wherein more than how many workers are engaged or employed?

    <p>250</p> Signup and view all the answers

    To retain the recognized certification of OHSAS 18001, Organisations which are certified to BS OHSAS 18001 should migrate to ISO 45001 by?

    <p>June 2021</p> Signup and view all the answers

    Which management tool is called as a top-down approach in safety analysis?

    <p>Fault Tree Analysis</p> Signup and view all the answers

    The main objective of risk assessment is to?

    <p>Evaluate hazard and minimize the risks</p> Signup and view all the answers

    In factories, the incidence rate is calculated by?

    <p>Total No. of Accidents x 106 / Total Man-Hour Worked</p> Signup and view all the answers

    Under the UN classification of hazardous materials, a material under UNHD 1.0 is?

    <p>Biohazard</p> Signup and view all the answers

    Risk Priority Number (RPN) cannot be more than?

    <p>1000</p> Signup and view all the answers

    Calculate the Oxygen Deficiency in a room of size 5m x 10m x 3m due to spillage of cryogenic liquid with an expansion ratio of 1:682.

    <p>14.2%</p> Signup and view all the answers

    The atmospheric conditions are normally classified according to six Pasquill stability Classes, a neutral coning type plume dispersion falls under which stability class?

    <p>Stability Class D</p> Signup and view all the answers

    Nodes, design indent and guide words are associated with?

    <p>HAZOP</p> Signup and view all the answers

    In FTA analysis, a primary event is?

    <p>considered as independent and is not further broken down</p> Signup and view all the answers

    Compute the flow rate of water required for Deluge system to cool the surface of spherical tank storing LPG. The Diameter of the Sphere is 10m and the density of water spray application rate is 10 lpm/m².

    <p>3140 lpm</p> Signup and view all the answers

    Which one of the following is a passive fire protection system?

    <p>Fire Break</p> Signup and view all the answers

    Battery Manufacturing units falls under which type of building occupancy?

    <p>High hazard (A)</p> Signup and view all the answers

    The life time of Carbon-di-oxide type fire extinguisher is?

    <p>5 years</p> Signup and view all the answers

    Radioactive elements are used in which type of Smoke detectors?

    <p>Ionization Smoke Detectors</p> Signup and view all the answers

    A mixture of Hydrogen in air at ambient conditions is explosive between the range?

    <p>4% to 94%</p> Signup and view all the answers

    A chemical explosion in which the speed of the reaction front moves faster than the speed of sound in that material is called?

    <p>Detonation</p> Signup and view all the answers

    Under the classification of hazardous zones for flammable gases, an area where explosive air-gas mixture is continuously present, or present for long periods is classified as?

    <p>Zone 0</p> Signup and view all the answers

    Occupational disease caused by deposition of excess iron in the body tissue is?

    <p>Siderosis</p> Signup and view all the answers

    An instrument for measuring exposure to ionizing radiation is?

    <p>Dosimeter</p> Signup and view all the answers

    Accidental contact of Cryogenic liquid with body parts causes?

    <p>Frost Bite</p> Signup and view all the answers

    Name the occupational illness caused due to Repetitive Strain injury (RSI)?

    <p>Carpal Tunnel Syndrome</p> Signup and view all the answers

    Permissible exposure limit (PEL) is a regulatory limit introduced by?

    <p>OSHA</p> Signup and view all the answers

    Strongest ionizing radiation among the following is?

    <p>Gamma</p> Signup and view all the answers

    Lasers are potentially the most hazardous.

    <p>Class 4</p> Signup and view all the answers

    As per rule 8 of the Hazardous and Other Wastes (Management and Transboundry) Rules, 2016, the occupier can store hazardous and other wastes for a period up to ______ days from the date of generation.

    <p>100</p> Signup and view all the answers

    As per Air (Prevention and Control of Pollution) Act, 1981, the concentration of Particulate Matter (size less than 10µm) in ambient air at residential area for 24 hours (Time Weighted Average) is.

    <p>100 µg/m³</p> Signup and view all the answers

    As per SMPV rules, the 5 years storage license issued by PESO, Nagpur for all pressure vessel is valid up to which month of the corresponding year.

    <p>30th November</p> Signup and view all the answers

    What is the permissible value of BOD allowed to discharge as Pollution control norms?

    <p>30 mg/l</p> Signup and view all the answers

    What is the minimum safety storage distance to be maintained between Oxygen and flammable gas cylinders?

    <p>20 ft</p> Signup and view all the answers

    As per the Gas Cylinder rules 2016, a license is required to store ______ kg, of a flammable non toxic gas.

    <blockquote> <p>25 nos, &gt;200 kg</p> </blockquote> Signup and view all the answers

    As per Indian Factories Act, the maximum permissible exposure limit to a continuous noise for eight hours working is:

    <p>85dBA</p> Signup and view all the answers

    As per IS 4379-1981, the content in a cylinder with black body and bands of signal red and golden yellow is:

    <p>Acetylene</p> Signup and view all the answers

    What is the colour coding for industrial Acetylene Cylinder:

    <p>Black</p> Signup and view all the answers

    Beyond what pressure the Cylinder filled with compressed gases are called as high-pressure cylinders (IS 7241-1983).

    <p>100 bar</p> Signup and view all the answers

    An electric resistance welding operates with:

    <p>High current and high voltage</p> Signup and view all the answers

    "Factor of safety" is defined as the ratio of:

    <p>ultimate strength and yield strength</p> Signup and view all the answers

    A safety device used in Oxy-fuel welding and cutting to prevent reverse flow of flame to the supply line.

    <p>Flashback arrester</p> Signup and view all the answers

    While storing different hazardous waste at one place, the critical characteristic to be considered is:

    <p>Compatibility</p> Signup and view all the answers

    The validity of consent to operate orange category of industries as per water act and air act is:

    <p>10 years</p> Signup and view all the answers

    Biomedical waste shall be disposed by?

    <p>Incineration</p> Signup and view all the answers

    The effective height of stack is given by:

    <p>Plume height + Actual height of the stack</p> Signup and view all the answers

    Which type of earthing has the least resistance value:

    <p>Lightning earthing</p> Signup and view all the answers

    The prime function of an RCCB in an electrical circuit is:

    <p>Prevent electrocution</p> Signup and view all the answers

    A design where the system can suffer complete loss of function without creating significant damage or danger is called:

    <p>Fail safe</p> Signup and view all the answers

    Study Notes

    Frequency Rate Calculation

    • A company with 625 workers, each working 48 hours per week for 50 weeks, had 30 lost-time injuries in 2018.
    • The frequency rate is 20.

    Firefighting Equipment Colors

    • Black pictogram on a yellow background are used on safety signs for firefighting equipment.

    Hazard Control Methods

    • Engineering controls are the most effective way to control hazards.

    Man Days Lost Calculation

    • As per IS 3786, the equivalent Man Days Lost for a loss of four fingers in one hand is 2400.

    Safety Committee

    • As per the Factories Act, a safety committee must be constituted when the number of workers engaged or employed is more than 250.

    OHSAS 18001 Certification

    • To retain OHSAS 18001 certification, organizations certified to BS OHSAS 18001 should migrate to ISO 45001 by June 2021.

    Safety Analysis Tool

    • Fault Tree Analysis is a top-down approach management tool in safety analysis.

    Risk Assessment Objective

    • The main objective of risk assessment is to evaluate hazards and minimize risks.

    Incidence Rate Calculation

    • In factories, the incidence rate is calculated as (Total No. of Accidents x 106) / (Total Man-Hour Worked).

    Hazardous Material Classification

    • Under the UN classification of hazardous materials, a material under UNHD 1.0 is corrosive.

    Hazard Identification and Risk Analysis

    • What-if analysis is not a hazard identification and risk analysis study.

    Oxygen Deficiency Calculation

    • Oxygen deficiency in a 5m x 10m x 3m room with spillage of cryogenic liquid and expansion ratio of 1:682 is 15.2%.

    Atmospheric Stability Classes

    • A neutral coning type plume dispersion falls under Stability Class D.

    HAZOP Analysis

    • Nodes, design indent, and guide words are commonly associated with HAZOP studies.

    FTA Analysis - Primary Event

    • In FTA analysis, a primary event is considered independent and is not further broken down.

    LPG Tank Cooling

    • The flow rate of water required to cool a spherical tank (10m diameter) storing LPG is 3140 lpm.

    Passive Fire Protection

    • A fire break is a passive fire protection system.

    Building Occupancy

    • Battery manufacturing units fall under high-hazard (A) building occupancy.

    Fire Extinguisher Lifespan

    • The lifespan of a carbon-di-oxide fire extinguisher is 5 years.

    Smoke Detector Elements

    • Radioactive elements are used in UV/IR based smoke detectors.

    Hydrogen Mixture Explosion

    • A mixture of hydrogen in air at ambient conditions is explosive between 4% to 94%.

    Chemical Explosion Type

    • A chemical explosion in which the reaction front moves faster than the speed of sound in the material is called detonation.

    Hazardous Zone Classification

    • In the classification of hazardous zones for flammable gases, an area where an explosive air-gas mixture is continuously present or present for long periods is classified as Zone 0.

    Occupational Disease - Siderosis

    • Siderosis is an occupational disease caused by the deposition of excess iron in tissues.

    Ionizing Radiation Measurement

    • A dosimeter is used to measure exposure to ionizing radiation.

    Cryogenic Liquid Contact

    • Accidental contact with cryogenic liquid causes frostbite.

    Repetitive Strain Injury

    • Carpal Tunnel Syndrome is an occupational illness caused by repetitive strain injury (RSI).

    Permissible Exposure Limit

    • Permissible exposure limit (PEL) is introduced by OSHA.

    Strongest Ionizing Radiation

    • Gamma rays are the strongest ionizing radiation.

    Hazardous Waste Storage

    • The occupier can store hazardous wastes for a period of up to 100 days from the date of generation.

    Air Pollution Concentration

    • The concentration of particulate matter (size less than 10µm) in ambient air at residential areas for 24 hours (Time Weighted Average) is 100 µg/m³.

    Pressure Vessel Storage License Validity

    • The 5-year storage license for pressure vessels issued by PESO, Nagpur is valid until November 30th of the corresponding year.

    Permissible BOD Discharge

    • The permissible value of BOD allowed to discharge as per pollution control norms is 30 mg/l.

    Oxygen and Flammable Gas Cylinder Storage Distance

    • The minimum safety storage distance between oxygen and flammable gas cylinders is 20 ft.

    Flammable Gas Storage License Requirement

    • A license is required to store more than 25 cylinders or greater than 200kg of a flammable non-toxic gas as per the Gas Cylinder rules 2016.

    Maximum Permissible Noise Level

    • The maximum permissible exposure limit to continuous noise for eight hours of work is 85dBA as per the Indian Factories Act.

    Cylinder Content Identification

    • A cylinder with a black body and bands of signal red and golden yellow contains acetylene (as per IS 4379-1981).

    Acetylene Cylinder Color

    • Maroon is the color coding for industrial acetylene cylinders.

    High-Pressure Cylinder Pressure Limit

    • Cylinders filled with compressed gases are referred to as high-pressure cylinders if the pressure exceeds 100 bar (as per IS 7241-1983).

    Electric Resistance Welding Operation

    • Electric resistance welding operates with high current and low voltage.

    Safety Factor

    • The safety factor is defined as the ratio of ultimate strength to yield strength.

    Oxygen-Fuel Welding Safety Device

    • A flashback arrester is a safety device used in oxy-fuel welding and cutting to prevent reverse flow of flame to the supply line.

    Hazardous Waste Storage Consideration

    • Compatibility is the critical characteristic to consider when storing different hazardous wastes.
    • The validity of consent to operate orange-category industries as per the Water Act and Air Act is 10 years.

    Biomedical Waste Disposal Method

    • Biomedical waste should be disposed of by incineration.

    Stack Height Calculation

    • The effective height of a stack is calculated by adding the actual height of the stack to plume rise.

    Earthing Type Resistance

    • Lightning earthing typically has the lowest resistance value among different earthing types.

    RCCB Function

    • The prime function of an RCCB in an electrical circuit is to prevent electrocution.

    Fail-Safe System Design

    • A fail-safe system is a design where the system can suffer a complete loss of function without creating significant damage or danger.

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    Description

    Test your knowledge on key topics in Occupational Health and Safety, including frequency rate calculation, hazard control methods, and safety committee regulations. This quiz covers essential principles and standards for maintaining workplace safety and health. Perfect for safety professionals and students alike!

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