wasif


{ City } lahore
< Country > pakistan
* Profession * assistant engineer
User No # 58843
Total Questions Posted # 1
Total Answers Posted # 5

Total Answers Posted for My Questions # 2
Total Views for My Questions # 4588

Users Marked my Answers as Correct # 208
Users Marked my Answers as Wrong # 33
Questions / { wasif }
Questions Answers Category Views Company eMail

On PVC conduit the class "A" "B" or "C" is marked what does it shows. Either its thickness or its composition?

 2 Electrical Engineering 4588



Answers / { wasif }

Question { 7113 }

What is HVAC, PLS SEND DETAIL OF hvac.


Answer

HVAC sytands for heating ventilation and air
conditioning. In centrally air conditioned buildings it
is used. To warm the interior in winter and cooilg in the
summer as well as the proper ventilation of the rrequired
areas. Usually it is done by the help of chillers and air
handling units with associated ducts. For supply of air.
For details visit www.mecatech.com.pk

Is This Answer Correct ?    5 Yes 0 No

Question { Alghanim, 73542 }

What is BMS (Building Managment System)& is AHU / HVAC are
in BMS.


Answer

It contains two types of controllers one is the main
usually mounted in the plant room while other sub main
controllers are mounted in the AHU's. All the controllers
are linked with one anoter. While sensing devices such as
temprature and humidity sensors are connected to each
specific controller. Main panel is attached with a
computer.Then all the controllers are programmed and their
parameters can be viewed by the computer attached to the
main panel.

Is This Answer Correct ?    130 Yes 15 No


Question { 19530 }

What is Fan Coil Unit .
How can we calculate CFM .


Answer

in simple words it is a very small air handling unit and
suspended above the false ceiling. A small blower throws
air which when strikes with the coil becomes hot or cool as
the case may be.

CFM (cubic feet per minute) can be calculated by the help
of cfm meter. it simply consists of a fan and a display
unit. When the fan is taken in front of diffuser it rotates
with a fix speed depending on the speed of air. Fan is
connected with a switch which produces fix no of impules
depending on its speed. Hence these impulses are sent to
the display unit at which these impulese appear in the form
of cfm

Is This Answer Correct ?    14 Yes 5 No

Question { 7843 }

how can we calculate that how much capacitor is needed for
a system to increase the pf?


Answer

KVAR =KW(tanQ1 - tanQ2)

where

KW= load of installation
tanQ1 = current power factor
tanQ2= target power factor

in thisway we can calculate KVAR of capacitor that how much
KVAR have to be improved.

Is This Answer Correct ?    2 Yes 0 No

Question { Ramky, 64863 }

why CT ratio stand for 50/5, 100/5, 25/5.


Answer

50/5 means that if 50 amps currnt will flow in primary then
5 amps current will flow in secondary. Actually it is the
transformation ratio of the ct Ip/Is

Is This Answer Correct ?    57 Yes 13 No