1. Write any 4 hazards in hot work activity?
I. Fire
II. Explosion
III. Electrocution
IV. Burns
V. Arc-flash
VI. Oxygen-depletion
VII. Toxic fumes
2. Identify activity for hot work permit?
Ans) welding & grinding
3. List 4 items to be considered prior to entering a confined space?
I. Is the Atmosphere Safe or not. Gas monitors typically check for the following.
a) Oxygen (O2) Levels High/Low. b) Carbon monoxide (toxic gas). c) Hydrogen sulfide, also known as “sewer gas”. d) Lower Explosive Limit (LEL) – This is the level where combustion can occur from gases produced by a variety of organic compounds that mix with oxygen.
II. Adequate EXIT and ENTRY.
III. Proper Ventilation system.
IV. Equipment’s Inspection.
V. Lighting Arrangements.
VI. Communication system.
VII. Competency of working crew (Training / Experience).
4. What is the Min & Max percentage of O2 allowed to work in confined space?
Ans) As per OSHA 19.5 % - 23.5%.
5. Which is highly flammable among below?
Ans) Hydrogen
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