200 Safety Interview Questions and Answers
Safety Interview Questions
Q. What is the Safety?
Safety is free from risk and danger (The word safety drives from the Latin word “SALVUS‟ means uninjured and healthy),
Q. What are the responsibilities of a Safety Officer?
The HSE Officer acts an advisory capacity to the management and supervision with regards Health and Safety Environment,
He is to monitor and ensure that the activities are being performed with the acceptable safety norms.
Helping supervisors to identify the hazardous and unsafe conditions and ensuring rectifications.
Conducting tool box meeting, Supervisors safety meeting, conducting training in various topics, conducting safety incentive program, conducting safety auditing/inspection.
Taking disciplinary action against the violations. Conducting risk assessment and JSA, pre task meeting and all other project related safety requirements.
Keep track record all incidents at site.
He is to investigate hazards and dangerous occurrences, examine the cause of accident, carry out safety inspection on site and what remedial steps/action has been under taken.
Q. What is a ‘Permit to Work’ Procedure / Work Permit System?
The „Permit to Work‟ (PTW) Procedure is a formal written system, which utilize a document to control the work by means of potential hazards identification and risk assessment. The work permit is also a means of communication among various supervisors or their respective belonging to operation, maintenance, controlling teams and contract personnel, who are involved in work preparation and / or its execution.
Q. Explain Types of Work Permit normally used in oil & gas industry?
Types of Work permits: 5 types of work permit
- Hot Work Permit (red)
- Cold Work Permit (green)
- Radiography Permit (yellow)
- Vehicle/mobile plant entry work permit
- Confined Space Entry Permit
(a) Hot Work Permit:
A document that specifies precautions identifies hazards and controls all work that is not hot and radiographic in nature.
(b) Hot Work Permit:
A document that specifies precautions, identifies hazards and controls all work involving actual naked flames, sparks or has potential for creating sparks or heat.
© Radiography Work Permit:
A document that specifies precautions identifies hazards and control all work involving radiographic in nature.
(d) Vehicle / Mobile Plant Entry Permit:
A document that specifies precautions identifies hazards and controls all work involving entry of a vehicle or mobile plant into a hazardous area.
(e) Confined Space Entry Permit:
A document that specifies precautions identifies hazards and controls all work involving entry to an enclosure, which has limited means of entry or exit, not designed for continuous occupancy.
Q. Explain Each Work Permit Validity? (as per KOC)
Hot / Cold / Radiography Permit:
Valid for a maximum duration of seven consecutive days from the date of issue subject to renewal by the permit issuer.
Note: Validity Period for Cold or Hot work permit in Non-Hazardous area can be extended for a maximum one month with approval from concerned Team Leader.
Confined Space Entry Permit:
Valid for one continuous work shift or part thereof; however the permit is to be renewed / re-endorsed in case of crew change, transfer of responsibility, work suspension or as recorded in the permit.
Vehicle / Mobile Plant Entry Permit:
Valid for one continuous works shift for Vehicle entry, whereas for Mobile Plant Entry it is valid for maximum 7 consecutive working days from the date of issue subject to renewal by Permit Issuer.
Q. What is e-WP (Electronic Work Permit)? (as per KOC)
Electronic Work Permit (e-WP) is a web-based solution through KOC intranet to manage electronically the authorization process of non-routine activities which are carried out in KOC business as per Permit to Work Procedure (KOC.SA.004).
Q. What is the Excavation? And types of excavation?
Any man made cavity, cut, trench or depression on an earth surface formed by earth removal.
Types of Excavation:
Manual Excavation: The excavation without using any powered equipment.
Mechanical Excavation: The excavation work using any electrical or mechanical equipment.
Q. Enlist precaution to be taken prior to taken to and during excavation work?
No excavation work in KOC area without clearance of Explosive Ordinance Disposal (EOD).
No mechanical excavation closer than 5 meters to any hydrocarbon carrying pipeline.
No mechanical excavation closer than 3 meter to a non-hydrocarbon carrying pipeline, cables and services.
For any excavation deeper than 1m, ladder must be positioned projecting minimum 1 meter above the edge of the excavations.
Ladders shall be provided every 7.5 meters (25 feet) of lateral travel in the trench.
Ladders shall be securely supported at the bottom as well as at the top. Excavated material shall be placed 1m from the edge of the excavation for depth up to 1.2 meter.
(Accordingly placement of excavated material shall be increased proportion to the depth of excavation.)
Heavy equipment, machinery shall be kept at least 3 meters away from the edge. Any walkway across trench shall have a platform with handrails. All trenches shall have barrier (such as fixed guardrails) and reflective warning notices clearly displayed. Flashing lights are mandatory during poor visibility. The access to plant, equipment and emergency services must not be obstructed by the trenches.
No mechanical excavation is allowed inside the existing KOC facilities (Gathering Center, Booster Station, water injection and handling facilities, etc.)
Q. What is confined space?
Any enclosure having a limited means of entry & exit and it is not designed for continuous occupancy.
There will be a presence of any hazardous substances such as flammable and toxic gases, oxygen deficiency, hot or humid atmosphere or any combination of it.
Examples: Process vessels, Tanks, Bins, Stacks, Large pipe, Duct, Pits & Trench etc.
Any excavation with depth more than 1.2 meter.
Q. What are the Confined Space Hazards?
A confined space may have one or combination of the following hazards:
- Oxygen deficiency
- Presence of flammable, combustible or pyrophoric materials (HC, Sludge etc.)* Presence of toxic gases, corrosive or hazardous materials (H2S, Co, NH3 etc.) * Poor illumination, Ventilation & Communication.
- High temperature and humidity.
- Limited entry & exit / Restricted access.
- Restricted movement inside.
- Falling / Tripping hazards
- Presence of reactive or self-igniting material.
- Hazard due to electricity or moving machinery.
- Hazard due to pressurized fluid.
- Hazard due to nature of work carried out inside confined space.
Q. What is Flash Point (FP)?
Minimum temperature at which a flammable mixture of gas or vapor in air will momentarily flash when a source of ignition (spark) is introduced.
Q. 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.
Q. What are LEL/LFL and UEL/UFL?
Lower Explosive Limit (LEL): or (Lower Flammable Limit)
Minimum concentration of vapor or gas in air which will burn when a source of ignition (spark) is introduced.
Upper Explosive Limit (UEL): or (Upper Flammable Limit)
Maximum vapor/gas to air concentration above which flame propagation will not occur, i.e. the mixture is “too rich” to burn.
Note-1: Flammable Gas Detectors (Meters) measure % LEL, hence actual LEL means 100% of full-scale reading of the meter. Below LEL (100% of meter reading), a mixture is “too lean” to burn.
Note-2: LEL of airborne combustible dust: If the dust obscures vision at a distance of 5 feet (1.52 m) or less it is considered as at LEL (ex. Sulfur or coke).
Q. What are the Hazards Associated with Electricity?
Hazards:
- Inadequate wiring.
- Exposed electrical parts
- Wire with bad insulation.
- Undergrounded electrical systems and tools.
- Overloaded circuits
- Damaged power tools and equipment.
- Using the wrong PPE and tools
- Overhead Powerlines.
