Technical Civil

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2021-05-15 17:25:59 https://play.google.com/store/apps/details?id=co.lynde.iofht ओपन / कमेंट

2021-05-15 14:59:23 Concrete mix proportions

M5 :- 1:5:10

M7.5 :- 1:4:8

M10 :- 1:3:6

M15:- 1:2:4

M20 :- 1:1.5:3

M25 :- 1:1:2

M30 :- 1:0.75:1.5( design mix)

Join @Technical_civil ओपन / कमेंट

2021-05-15 13:38:14 For promotion in channel

Contact -

technicalengineers01@gmail.com


@niketraj ओपन / कमेंट

2021-05-15 11:35:23 #Opportunities
BEL - Trainee Engineer

Bharat Electronics Limited, a Navratna company and India’s premier professional electronics company under the Ministry of Defence, requires the following personnel on contract basis for its Military Communication SBU, Bengaluru Complex

Post
Trainee Engineer - 1
Vacancies - 30

Essential Qualification
Full time BE/B.Tech with first class marks in the following disciplines
Electronics/Electronics and Comm./Electronics and Telecomm.

Candidates should have minimum 6 months of post qualification experience

Age
Upper age limit is 25 years as on 01.04.2021

Selection Process
BE/B.Tech aggregate marks will have a weightage of 75%
Post qualification experience will have a weightage of 10%
Personal Interview will have a weightage of 15%

Important Dates
Online applications opened on: 12.05.2021
Last date to submit applications: 21.05.2021

Website Link
https://www.bel-india.in/CareersGridbind.aspx?MId=29&LId=1&subject=1&link=0&issnno=1&name=Recruitment+-+Advertisements ओपन / कमेंट

2021-05-15 10:53:02 Waste water Engineering completed ओपन / कमेंट

2021-05-15 10:52:33 Air pollution

Air pollution control

Particulate control technology

Gravity settling chamber :-

~ dust particle > 50 μm

~ η <50%

Centrifugal separators

~ dust particle :- 5 - 50 μm

~ η :- 50 - 90%

Electrostatic precipitator

~ dust particle ≥1 μm

~ η :- 95 - 99%

Fabric filter

~ dust particle <1 μm

~ η :- >99%

Wet scrubbers

Tray scrubber

 ~ dust particle > 10 μm

~ η :- <80%

Cyclone scrubber

~ dust particle >2.5 μm

~ η :- <85%

Venturi scrubber

~ dust particle >0.5 μm

~ η :- <90%

Gaseous control technology

Adsorption

Absorption

Combustion

@Technical_civil ओपन / कमेंट

2021-05-15 10:52:33 Air pollution

Dispersion of air pollutants into the atmosphere

The rate of temperature with altitude is known as lapse rate

Adiabatic Lapse rate :- Any warm air parcel if it rise in temperature for every 1 km rise, change of temperature is -9.8℃

Ringleman charts :- It measure density of smoke

Isokinetic sampling :- Collection of smoke using the probe across the c/s of stack

@Technical_civil ओपन / कमेंट

2021-05-15 10:52:33 Air pollution

Acid rain

Acid rain results when gaseous emission SOx & NOx interact with water vapour and sunlight and are chemically converted to strong acidic compounds (H2SO4 & HNO3) along with other organic and inorganic chemicals.

If pH of rain less than 5.6 is called acid rain


Global warming

The major green house gases

Carbon dioxide :- 57%

Methane :- 12%

Nitrous oxide :- 6%

Chlorofloro carbon (CFC) :- 25%


Ozone layer depletion

Primary reason of ozone layer depletion is CFC

@Technical_civil ओपन / कमेंट

2021-05-15 10:52:33 Air pollution

Major air pollutants

Particulats

particulates in atmosphere are measured by High volume air sampler

Carbon monoxide

CO is analysed by NDIR (Non Dispersive Infrared) analyser.

Oxides of sulphur

SOx are measured by West & Gaek method

Oxides of Nitrogen

NOx are estimated by Jacob - Oscheisser method

Hydrocarbons

Hydrocarbons estimated by Gas Chromatography

@Technical_civil ओपन / कमेंट