Скачать с ютуб Basic to Advance Safety Officer Interview Question and Answer Part 4||Fresher HSE Officer interview в хорошем качестве

Basic to Advance Safety Officer Interview Question and Answer Part 4||Fresher HSE Officer interview

Part 4 of Safety Officer Interview Question and Answer Q#31: Define TLV and STEL? TWA: Time Weighted Average (TWA) concentration of the contaminant in air to which workers can be exposed without respiratory protection over the normal work shift of 8 hours, in a 40-hour workweek. STEL: STEL stands for Short Term Exposure Limit "It is a maximum on concentration to which works or can be exposed to a period of to15 minutes continuously without suffering from irritation." This maximum concentration can be allowed to breathe 4 times during 8 hours with minimum 1-hour interval between exposures. Q32: What is IDLH: IDLH stands for Immediate Dangerous to Life or Health It is the Minimum concentration of contaminant in air which is Immediately Dangerous to Life and Health causing death or immediate/delayed permanent adverse effects. (Note: Air supplied respirators are required in IDLH atmospheres.) Such as a toxic gas, poses an immediate threat to health or life, would cause irreversible adverse health affects. Q#33. What are LEL and UEL? Lower Explosive Limit (LEL): Minimum concentration of vapor or gas in air which will burn when a source of ignition (spark) is introduced. Upper Explosive Limit (UEL): Maximum vapor/gas to air concentration above which flame propagation will not occur, i.e. the mixture is “too rich” to burn. The range between the Lower Explosive Limit and Upper explosive limit is known as the flammable range for that gas Example: Methane has Lower Explosive Limit 5 percent and Upper explosive limit 17 percent. which means 5 to 17 percent is the burning range of the methane. Less than 5 percent it will be too lean to burn and above 17 percent it will be too rich to burn. Q#34. Explain Fire Triangle? The fire triangle, or combustion triangle, is the three components needed to ignite and sustain a fire. The three ingredients of a fire triangle are; heat, fuel and oxygen. Absence of any of the components, fire would not occur. Q#35. What are different class of types of fire and their Fire Extinguisher? Class of Fire: • Class A – Carbon based combustible materials such as wood, rubber, paper, fabric. • Fire extinguisher - Water, Foam, Dry Powder, Wet Chemical • Class B – Liquid such as petrol, oil, thinners etc • Fire extinguisher - Water, Foam, Dry Powder, Wet Chemical • Class C – Gases such as acetylene, propane, LPG, Butane. • Fire extinguisher - Dry Powder • Class D – Metals (Sodium, potassium, magnesium) require special extinguishing agent. • Class D Fire extinguisher: Dry Powder(which contains powdered graphite, granular sodium chloride or copper based) • Class E – Fire involving energized electrical equipment as electrical cable, electrical motor etc. • Fire extinguisher - Dry Powder, Carbon Dioxide (CO2). Q#36. What is Auto Ignition Temperature (AIT)? Minimum temperature required to initiate self-sustained combustion of a solid, liquid or gas in the absence of a source of ignition Q37. What is Fire Point? Fire point is the minimum temperature at which vapor produced from the fuel will sustain a fire for at least 5 second on the presence of an ignition source. As fire point of diesel is 57 degrees Celsius Q38. Define Hazardous Area? What are the different Hazardous Area Classification? What is Zone 0, 1 and 2. Hazardous Area: Hazardous area is the zone in which a flammable atmosphere may be present during normal operation or under abnormal conditions. Classification of Hazardous Area: Zone – 0: Zone in which a flammable atmosphere is continuously present or present for a long period. (Typically more than 1000 hours/year.) Zone – 1: Zone in which a flammable atmosphere is likely to occur in normal operations. (Typically 10 to 1000 hours/year) Zone- 2: Zone in which a flammable atmosphere is not likely to occur under normal operations and if it occurs, it will only exist for a short time. (Typically less than 10 hours/year) Q#39: What is waste management? Waste management means safely disposing the by-product of a process or a work to the environment (after proper treatment, if necessary) so that no threat for livings, properties and environment exists. Q40: What is MSDS? Material safety data sheet(MSDS) is the document prepared by the manufacturer giving- • Product name, • Producer’s address, • Emergency contact phone number, • Information of ingredients, • Possible hazards, • First-Aid measures, • Precautions to be taken for storage and handling • Recommended PPEs and Extinguishers), • Physical and Chemical properties. . . safety, format: interview, notes for safety officer, HSE officer interview, HSE interview questions in oil and gas, HSE officer interview questions and answers, HSE study guide, safety officer interview questions for fresher, safety officers interview questions and answers in English, , important questions for safety officer, safety job, interview tips, interview