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NEBOSH EXAM WITH COMPLETE 250 QUESTIONS AND C0RRECT ANSWERS LATEST VERSION
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NEBOSH EXAM WITH COMPLETE 250 QUESTIONS AND C0RRECT ANSWERS LATEST VERSION
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Page 1 of 68NEBOSH EXAM WITH COMPLETE 250 QUESTIONS
AND C0RRECT ANSWERS LATEST VERSION 2024-
2025
Outline the main operational issues communicated at shift handover - CORRECT
ANSWER✔✔Main operational issues communicated at shift handover include:
Operational status of the installation or process
Maintenance completed
Maintenance still ongoing
Maintenance planned during on-coming shift
Routine operation for next shift
Updating PTW's - Closed out or still open
, Page 2 of 68
Any events that happened during the out-going shift, Emergencies, incidents, accidents,
breakdowns, plant overrides.
Situations where safety systems have been overridden e.g. fire deluge system switched to
manual operation
Planned events during oncoming shift, shutdowns, drills exercises
Operational issues that will occur during the on-coming shift
Changes in plant parameters
Outline FOUR types of work activity associated with an oil platform that might require permit
to-work AND give a reason in EACH case for the requirement. - CORRECT ANSWER✔✔Hot Work
Hot Work Permits are generally applied to any type of work, which involves actual or potential
sources of ignition, and work for which there may be a risk of a fire and/or explosion, or which
involves the emission of toxic fumes from the application of heat.
Cold work
, Page 3 of 68
Cold work shall include but not be limited to the following: scaffolding, cleaning, over side
working, painting
Confined space entry
A confined space is any vessel, enclosure or compartment large enough to take a person where
the atmosphere may be dangerous or incompatible to a person entering because of
flammable/toxic gases and other substances or oxygen deficiency.
Isolation
An Isolation Certificate is required before any work can be started on process, mechanical or
electrical plant or equipment. An Isolation Certificate is also required where access to the site of
work is restricted or its safety is jeopardized by any adjacent plant or equipment. An activity
cannot commence until all the necessary isolation requirements are in place
Diving
Diving certificate can be used to control the diving activity itself and to ensure that there are no
other activities taking place nearby which create unnecessary additional risks e.g. over-side
work, live firewater intake pumps.
, Page 4 of 68
Identify TWO ways in which vapour clouds can be generated - CORRECT ANSWER✔✔Sudden
depressurization
Rupture of vessel
Loss of containment
Uncontrolled buildup of pressure
Outline how a vapour cloud explosion can be generated - CORRECT ANSWER✔✔Vapour cloud
explosion can be generated by;
Confined / unconfined generation
Vapour cloud explosions may arise from vaporization of a release of liquefied gas from a
ruptured vessel or pipeline
Identify the physical consequences of vapour cloud explosions - CORRECT ANSWER✔✔Physical
consequences of vapour cloud explosions;
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