Part 2 - ADNOC Interview Questions & Answer
What is Permit
to work? What are the Main permits? Certificates? What is the difference
between Hot and
Cold works?
Ans.: It is a
legal, formal written document which is used to control a certain type of work
which are
potentially
hazardous.
Mainly two types
of Permit (Hot work and Cold work)
Certificates are
Excavation certificate, radiography certificate, confined space entry
certificates, high
voltage
certificate, isolation certificate, de isolation certificate, vehicle entry
certificate, etc.
Hot work: Any
work which is produce heat or ignition source (Eg. Welding, grinding, gas
cutting, etc.)
Cold work: Any
work which does not produce any heat (Scaffolding activity, blinding, etc.)
What are the HSE
requirement for Radiography?
Ans.: Experience
history, Medical History, Radiation Protection Supervisor shall be qualified
with
certification
(Recognized certificate from NRPB {National Radiation protection board} from
UK).
Work
instruction/ Method statement, Emergency Action Plan, Emergency contact
numbers,
Emergency Kit,
Personnel Dossi meter and Calibration certificate, surveyor meter and
calibration, TLD
badge for
Personnel, Source transportation vehicle shall be approved from FANR (Federal
authority
for Nuclear
Regulation), Source storage requirements and Source movement control log.
What are things
you know about H2S? TLV? STEL? LEL? UEL? IDLH? Auto ignition temperature?
Ans.: H2S is
heavier than air (1.19), invisible, Toxic, poisonous, corrosive, flammable,
pyrophoric,
Soluble in water
& oil, rotten egg smell in low concentration (below 1ppm).
Threshold Limit
Value (TLV) is 10 PPM for 8 hours.
Short Term
Exposure Limit (STEL) is 15PPM. (The concentration which it is believed that a
person
can exposed
continuously for 15 PPM without any danger to health, irritation and his
safety).
Lower Exposure
Limit (LEL) is4.3 %( 43000PPM).
Upper Exposure
Limit (UEL) is 46 %( 460000PPM).
Immediate Danger
to Life and Health (IDLH) is above 100PPM.
Auto ignition
temperature is 500 F (260 c).
What is static
electricity?
Ans.: When 2
objects come it to contact electron can move one object to other, causing the
atom
become
electrical imbalance and therefore electrical charge, this electrical charge called
static electricity.
Hazardous Area
Classification?
Ans.: Zone 1: An
area in which an explosive gas atmosphere is present continuously or for long
periods;
Zone 2: An area
in which an explosive gas atmosphere is likely to occur in normal operation.
Zone 3: An area in which an explosive gas atmosphere
is not likely to occur in normal operation and,
if it occurs,
will only exist for a short time.
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