randhir singh


{ City } allahabad
< Country > india
* Profession * jr. engineer (mechanical, powe
User No # 99794
Total Questions Posted # 0
Total Answers Posted # 13

Total Answers Posted for My Questions # 0
Total Views for My Questions # 0

Users Marked my Answers as Correct # 152
Users Marked my Answers as Wrong # 51
Questions / { randhir singh }
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Answers / { randhir singh }

Question { Balco, 19689 }

why vaccume required in turbine?


Answer

Low pressure exhaust steam can't be feed to boiler in steam form , after condensing it can be easily feed to boiler by pumps,

Is This Answer Correct ?    2 Yes 0 No

Question { Tata Power, 21775 }

Why attemperation is required in HRSG in a combined cycle
power plant?


Answer

To control steam temperatur during flue gas temperature variation and rapidly varing load condition.

Is This Answer Correct ?    17 Yes 1 No


Question { Vedanta, 14177 }

why drum level is increased when one of the running coal
elevations are suddenly tripped?


Answer

In boiler drum level depends on steam pressure, when one of the running coal elevation suddenly tripped, steam pressure decreases, so drum level increases.

Is This Answer Correct ?    18 Yes 4 No

Question { Bajaj, 10249 }

why expansion bellow is provided in between hopper and vessel
in ash handling plant?


Answer

To provide isolation from vibrators & to reduce thermal stress between hopper and vessel.

Is This Answer Correct ?    13 Yes 1 No

Question { 7225 }

what is
the
difference
between
flow and
force ,draught
and
vaccum ,tube
and pipe?


Answer

Draught represents flow,
Vaccum represents intensity

Is This Answer Correct ?    5 Yes 1 No

Question { 8819 }

What is Droop Control in Woodward?


Answer

Principal of droop is to povide stable operation,
Speed droop is a governer function which reduces governer reference speed as load increase.

Is This Answer Correct ?    2 Yes 0 No

Question { NTPC, 20947 }

what is significance of canister vent in condensate
extraction pump & difference between vacuume balancinf line
& canister vent


Answer

Canister vent is used to return back, non condense gas/ steam to condenser

Is This Answer Correct ?    21 Yes 5 No

Question { 18042 }

why IBD Vent is kept at higher elevation than CBD ?


Answer

CBD uses to remove floating impurites which collectes on top of water and IBD uses to remove TDS which collects in bottom (mud drum). So CBD vent kept at higher elevation than IBD vent.

Is This Answer Correct ?    11 Yes 19 No

Question { 12843 }

How to decide Heating surface area of boiler on their steam
generating capacity?


Answer

Heating surface area of a boiler depends on gas velocity, size of tube, tube pitch, arrangement, configuration of tube. For the same duty or heat transefer one can develop different designs with significant difference in surface area

Is This Answer Correct ?    3 Yes 6 No

Question { ABB, 12047 }

In a coal fired boiler furnace temp. is high but super
heater out let temp. low what reason for this?


Answer

Two reason
1. Scale deposit inside the boiler & superheater tube,
2. Soot deposits outer surface of boiler & superheater tube,

Is This Answer Correct ?    16 Yes 2 No

Question { Essar, 16904 }

In a thermal power plant ID Fans running with full load but
boiler load is only 80 % give reason ?


Answer

There will be soot deposits on outer surface of boiler tube

Is This Answer Correct ?    17 Yes 6 No

Question { Essar, 16904 }

In a thermal power plant ID Fans running with full load but
boiler load is only 80 % give reason ?


Answer

May be...
1.APH tube leakage
2.Boiler ducting leakage

Is This Answer Correct ?    11 Yes 2 No

Question { Mother Dairy, 6318 }

what is absolute pressure, gauge pressure and atmospheric pressure?


Answer

' Absolute pressure = Atmospheric pressure + gauge pressure '

Is This Answer Correct ?    16 Yes 4 No