Google Drive MEP(HVAC , Plumbing, Fire Fighting and Electrical) complete Design Data and Drawings
Link is below ....
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Fire Fighting :-ENGINEERS /QA/QC/SUPERVISORS/ INSPECTORS PROFESSIONAL INTERVIEW
1) What
are the types of pump sets used and why in fire fighting?
Jockey pump – used when there is a pressure
drop of 1 bar.
Diesel pump – used in case of power shut
down.
Electric pump – Main pump starts instantly
in case of fire and will cutoff @ 7 bar.
2) What
is fire alarm check valve?
It allows flow in one direction and
prevents backward flow and with this gives signal to BMS with alarms.
3) What
is FM-200 and where is it used?
Heptafloropropane is colorless, liquefied
compressed gas. It is stored as a liquid and dispensed into the hazard as a colorless,
eclectically non-conductive vapour that is clear and does not obscure vision.
It is used in communication rooms,
electrical rooms, computer rooms etc..
4) Types
of detectors? Smoke & Heat detectors.
5) Do
we use strainers in fire pumps? Why?
No, we don’t use it because the water
coming is portable usually only in cases where we are using river or lake water
then we require strainers. Else we prefer not to use them as it will reduce
suction flow.
6) Radius
of a sprinkler? it is 1.5 m
7) What
is the distance between each sprinkler? Its 3 m to 4m.
8) Working
pressure of fire system? Its 10 bar.
9) What
is Siamese Connection?
Used as auxiliary connection
through which the fire department can pump water to supplement existing water
supplies.
10) What
are the Settings of Diesel pump upon how much pressure it is cut off? Don’t
know ck internet.
11) What
is OS&Y, Tamper switch, Pressure switch and their working?
OS&Y valve - Outside screw & Yoke –
is used in fire system mains and is used for easy knowing whether it is in open
position or closed as we cannot know
from a typical gate valve or ball valve.
Tamper switch - It is a supervisory device located on the control valves of a fire
protection system. The tamper switch is a device which, when connected to an
alarm panel or sounder, signals a disturbance (opening or closing) at the
control valves of the system.
Pressure
Switch - These critical components sense the activation of the system and then
electrically secure the ventilation systems operating in the protected space.
12) What
is the use of strainer? It is installed before the cooling coil to protect dirt
& foreign material entering into the cooling coil /evaporator.
13) What
is the use of staircase pressurization?
To provide fresh & clean air in the
staircase when fire occurs in the floor. The pressurized air keeps the smoke
away from the stair wall. It is used for creating positive pressure.
14) Name
some fine controlled Valves? Needle valve,Spindle valve, regulating valve,
motorized valved etc.
15) What
should be height of fire cabinet from floor level? 1 m.
16) What
are the different types of sprinkler heads used in fire protection system?
Upright sprinkler, Pendent sprinkler, Side
wall sprinkler, Pendent Recessed sprinkler, extended side wall sprinkler,
extended coverage etc.,
17)
What is the test pressure for firefighting pipe
network? 1.5 times working pressure.
18)
What is the temperature rating for firefighting
sprinkler head? 170°F or 76°c.
19)
What is the fire department connection known as?
Siamese.
20)
Name the different types of fire extinguisher? Portable
type CO2, Portable type Dry Powder & water.
21)
What are the different types of Valve used in
fire protection system? Alarm valve, Zonal valve etc.
22)
What the pipe material used for underground fire
piping? UPVC, MDPA, RTR.
23)
What is zone control valve?
It is used in ff
system on every floor … it consist of OS & Y Gate valve with tamper switch,
Check Valve, pressure gauge, Drain point, Flow meter & Sight glass. “Check
FF Notes”.
24)
What is the standard length of hose in a hose
reel cabinet? 30m.
25) Pipe
material used in FF system and which class? ‘Check FF Notes’.
26) Floor
Control Valve Assembly? ‘Check FF Notes’.
27) Name
the pipe materials used in Water supply? ‘Check FF Notes’.
End
of Question & Answer.
Best
of Luck
