Saudi Aramco HSE Interview Q & A –
Part 3
NAPO SHOCKING SITUATIONS | SAFETY IN
FREE FREE – Chemical Hazards Training Module
What is
IDLH limit of H2S?
Immediately
dangerous life to health 100ppm>above
What is
safe limit of gases, oxygen, h2s, C0?
Oxygen
20-23.5%, H2S less than 10ppm, CO2 Less than 35ppm
H2S
emergency Action Steps?
1. Evacuate
the Area
2. Sound
the Alarm
3. Assess
the situation
4. Protect
rescue plan
5. Rescue
the victim
6. Revive victim
7. Get
medical Aid
Gases
level?
O2
20 to23.5%
normal to perform job
Less than
20% use SCABA and Division Head Sign
Above 23.5%
not work allowed
H2S
10ppm or
above Breathing apparatus must use
10 to
100ppm Use SCBA and Division head sign
100 above
not work allowed.
CO
35ppm or
above Breathing apparatus must use
1000ppm or
above no CS entry allowed
LEL
Above 0%
LEL No hot work allowed
5% (0.5) to
10%(0.1) Breathing apparatus must use
10 %(0.1)
or above no work and CS entry allowed
Gas tester
name?
T40
rattler*
Mx4 vents
Mx6 I bird.
Multi Gas Taster?
MX4*
What is
JSA?
The
document in which we divide the job into different steps in front of steps we
write his hazards and precaution
JSA means
looking at the work task and considering what is the safety way to complete it.
It is a way of becoming aware of the hazards involved in doing the job.
Define the
Excavation?
Digging
(Moving) of earth though hand tool equipment and explosive is called
excavation.
Excavation
type?
Mechanical
excavation
Manual
Excavation
Shoring,
benching and sloping use to protect cave-in
What is the
attachment of Excavation before taking permit?
Pre
Excavation check list
Daily
excavation check list
Equipment
check list
JSA (Job
safety analysis)
What are
excavation hazards?
Cave in,
fall of moving machinery, Falling of material
Class of
soil and angle use in excavation?
Rock slope
angle 90°
Class A
tight cohesive soil such as clay, rock and slope angle 75°
Class B
loss cohesive soil such as mix soil, rock and clay slope angle 45°
Class C
least cohesive soil such as gravel sand freely slipping soil safe slope angle
34°
Saudi
Aramco maximum safe angle of slope? 34°
type C
Excavation
machine are not to operate closer than how many meter?
3m or 10ft
Benching
the horizontal step and vertical rise between each step should be approximately
how many meters? 1.2m 4 feet
Keep away
motor vehicle, crane and heavy equipment shall be kept from edge of excavation?
2m (6.5ft)
Spoil piles
should be placed at least how many feet the edge of excavation?
2ft away
How much
distance between excavation and heavy equipment, soil piles, scaffolding?
2mter and
scaffolding 1.5xDepth of Excavation
What is
minimum safe distance should be kept from overhead line?
Up to 50kv
3m
50kv -250kv
6m
More than
250Kv 7.6m.
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