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Safety Interview Questions 7

Safety Interview Questions 7 contains about confined space & Confined Space Hazards, H2S safety, fire extinguisher,

61. Enlist precaution to be taken prior to taken to and during excavation work? OR What is the safety precautions required for a safe excavation?
62. What is confined space?
63. What are the Confined Space Hazards? 
64. 

61. Enlist precaution to be taken prior to taken to and during excavation work? OR What is the safety precautions required for a safe excavation?

 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 scaffold type 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.)


62. 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.


63. 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.

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64. What is the procedure for entering a confined space hazards? OR What are the important PRECAUTIONS for confined space? 

Procedure for entering confined space:

1. Permit must be procured form operations, making sure of the following.

a. Complete isolation of the space to be entered.

b. Draining, depressurization and purging or cleaning should be 



 

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