The cancelled question by the infamous Mr guest about mixing AC and DC made me wonder about the pop crackle bang replies. I am not electrical or electronic and therefore may ask stupid questions. My feeling is that would be a useless activity and will sound like a gravel road - but may

Okay, in one corner we have Roger Pink, great thinker and CR4 citizen, representing the Pro Global Warming stance. In the other corner we have the Mystery Guest X, venerable and valiant in his thinking, representing the Anti-Global Warming viewpoint. The rules are simple. No hitting under

pl give us lathe machining time calculation or its formaula

Which is more cost effective to make an underground plastic injectionmolded product from PVC or HDPE. I originally machined a prototype from HDPE and it works very well. It needs to be flexible yet rigid enough to clamp around different sized underground irrigation pipes. Many Thanks,

In case of incrice turns of primery side of 11kv Transfomer what will hapens to the secondry side voltage Ex.primery 100 turns 11kv rated 400v seconry if i chang tap to 108 turns 11kv what is the secondry volts?

I am looking for a supplier for tubing and fittings for micro reactor systems (Lab-on-a-chip). BR, Rik.

what name of transformer oil?

if i feed dc power in ac power?

We are running a Asselin needle punch line , needleing polypropylene into secondary backing to be turned into carpet . Our bed plates that the needles punches through get clogged with melted fiber . We are using a lazer blade to clean it with now but it doesn't get all of it out . Does anyone out th

I am looking for and existing device that could allow me to drain bottles that range in fullness and are plastic welded closed. The bottle is not intended to be salvaged for repeat filling after draining, but there will be fluid within the bottle. The fumes of the contents are potentially harmful

Do any specific requirement is there in BS6651 (Lightning protection)or any other standard on the minimum spacing to be adopted between an electronic earth pit(clean earth) and a lightning protection earth pit?

hi collegues.. i have searching about electricty blackout why occurs and america's 2001 blackout report on Intrenet but i have'nt found any good documents. can anybody help me?

NEEDED, expertise in sprockets and belt-chains to help me locate of the correct parts for making a tensioning device for a kettledrum (musical instrument). What I need is (10), 3inch sprockets of about 3" in diameter with an adequate amount of teeth, and a raised middle section that has an aprox

How to calculate the bending stress for the buried pipeline??

Hi all, I need to design an accelerated life test for a motor and gearbox assembly to simulate 7500hrs (312.5 days) life in a reasonable test timeframe (3 weeks). Can anyone suggest an accelerated life test standard, or where to look for one? Thanks Cormac

i'm a chemical engineering final year student, currently i'm doing a design project regarding to converting glycerol (C3H8O3) into hydrogen (H2). may i know that is that possible to use crude glycerol (abt 80% purity) in the process? if can not, may i know what is the minimum purity neede

I have old LV MCC 11/0.4kv supplied by 1 MVA transformer ,this MCC contain many feeders and motor starters which supply two administration building .I want to replace the MCC and to install emergency generator with automatic transfer switch to supply the necessary loads incase of any failure .

i want to introduce one bucket conveyor which is going to carry 5 ton of soap how can i select the gear motor for it considering friction losses please advice me

can any machinist tell me how to control warpage to the minimum example >.020mm when we milling aluminium thickness 5mm and we mill many pocket.the outside dimension is 200x200mm.or i should select a different aluminium?

hello everyone. please help me out with this: i want a schematic which can be used for broadcasting FM over 2-3 km range. there are no problems with the licence and other legal things.everything is set. its just that i want to build the station on my own. i hope to

Dear sirs The subject of oil recycling which was dicussed by OILY and MILO,is a very important one.How can we continue discussion inorder to get agood results? I would like to contact our friend MILO if possible. Thanks

Is there any criteria or specification to identify the wear and tear of the gear tooth?

Dear all, Some one would provide me the materials containt with percentage of SS 304L & SS 316L. Also the above materials testing procedure. Tariqul

Is it possible for you to send me informations about quality assurance plan ?

sir, I want to know max pressure limit for low pressure boiler,high pressure boiler,critical boiler,super critical boiler

What is difference in using eccentric reducer & concentric reducer in process piping for sampling or vent lines?

I've searched some websites to know the reason about this question, but actually answers do not make sense to me. Some answers are saying that arm swing is occured for compensating the body rotational momentum. when we straight out right leg, our body would have leftsided momentum. that

Dear all, Presently I am doing LPG project regarding that, i have 3 quires. 1) This LPG Project is for supply LPG to Kitchen. here i used 2 cylinder bank, each cylinder bank contain 10 cylinder, each cylinder weight is 47 kg net, and each cylinder pressure is 16kg/cm.sq.LPG is sup

I went out of town and when I got back my refrigerator was not cooling ... It sounds like the compressor runs but .... its not cooling at all ... The freezer ( has a separate door ) light turns in but the other side seems to be off...

With the development of Alternative Energy sources Wind Energy is one of the Options and off let thousand of Megawatts of Electricity is being produced by these wind mills across the world. What I feel that, if this much power is drawn from the wind from all over the world. Could this imp

Good day all, I need urgent help on the calculation of the weight of component gases (and the total) in a compressed cylinder with following info: Filled @ 13.4 MPa Volume: 6.3 m3 30% V/V CO2 in Nitrogen Compressed Thanks

what is the different of 316 & 316L

I am interested in building a Hydrogen Fuel Generator using SS316L and would like my connections at the SS316L plates to be welded. I will be forming 1" x 8" pieces of SS316L to connect between; bolted studs protruding through acrylic plastic, which pass down to SS316L plates. What would be the mos

Installing Insignia NS-BTHDST, Is there a link to download for this here?

Having revived my 1970 Yamaha with new points, rings, etc, I rode it around the block twice. Now when I got insurance and some licence plates, it won't keep running. I had put in a carburetor with a clean and free sleeve. Now it is sticking, with less than a mile of travel. What do I put on it to ke

Hi, everyone. I have a question regarding weld ability Weld ability between A182 F51 and A182 F316. Now, i am trying to purchase Level Gauge made of SS316 Chamber and Duplex Flanges. In my experience, it can be diffcult to meet required mechanical properties when they are welded as groove wel

What is physical meaning of enthalpy? why it is needed to calculate the enthalpy in chemical reactions or in thermodynamics? why it is defined as H=U+PV? Enthalpy value shows what? someone said me that it is a change in heat at constant pressure,agreed--but what will happen to enthalp

how much time a man can work with vibration in his back?

we call it the glass frosting powder, which is used to obscure the surface of glass and other glasswares to improve the additional value of these glassworks.for example,the shower door is not transparent, it feels obsure, the effect is produced with the help of this material, the glass frosti

My 98 200SX runs great for the first two or three miles. It then dies and there is no starting it til it cools down. Any suggestions? Thanks, Dennis

To whom it may concern: Please quote the following specification; 1. Stage: 1 2. Gas Handled: VCM Mol Wt. 62.5, 2128 kg/H Water Mol Wt. 18, 126 kg/H 3. Flow Rate Nor./Des. : 900 Nm3/h /1100 Nm3/h 4. Suction Pressure: 0 kg/cm2 5. Suction Temperature: 5

I have a 500 hp GE 4 pole 4160 volt wound rotor motor. The motor is driving a horizontal split case centrifugal pump.I had the slip riings shorted to operate as a squirrel cage motor. At times the motor will not start, rotate the shaft manually and it will take off. I have several other motors that

I made this golf trolley about four years back as a winter project. I was beginning to find that carrying my golf bag for 18 holes was a bit tough on my back and knees. I bought the motor/gearbox and 2 back wheels for about £90 from Standel Dawman, a comp

On this day in engineering history, Western Electric finished work on the first part of the Distant Early Warning (DEW) Line, a series of radar stations that were designed to detect incoming Soviet bombers armed with nuclear weapons. When the DEW Line was completed in 1961 with an eastern segm

UCL Physics & Astronomy lecturer, Dr Sarah Bridle, has been recognized for her outstanding contributions with a For Women in Science Fellowship from L'Oreal. Dr Bridle works in the Galaxies and Cosmology research group, where her focus is on dark energy and dark matter – the mysteri

From Slashdot: Using a link analysis algorithm similar to Google PageRank, researchers at the SANS Institute and SRI International have created a new Internet network defense service that rethinks the way network blacklists are formulated and distributed. The service, called Highly

From Newlaunches.com: Apollo 14 astronaut Dr Edgar Mitchell holds the record for the longest ever moon walk, at nine hours and 17 minutes following their 1971 mission. But that's not his claim to fame for the moment; according to him aliens have been making contact with humans and

From The Engineer: Chemical giant Ineos has developed a technique to produce bioethanol in large quantities from municipal solid waste, organic commercial waste and agricultural residues. The company believes that, using the process, one tonne of dry waste can be converted into

From Scientific American: A friend of mine lives in a middle-class neighborhood of New Delhi, one of the richest cities in India. Although the area gets a fair amount of rain every year, he wakes in the morning to the blare of a megaphone announcing that freshwater will be availabl

The organizers of ITMA Asia + CITME took tough measures at last month's textile machinery Expo in Shanghai to crack down on counterfeit machinery and components. Such disregard for patent and intellectual property rights has long been a sore spot for manufacturers. But do these efforts come too late

At the Olympics or national political conventions wireless microphones give journalists flexibility to move freely. Some technology companies have asked the FCC for permission to sell wireless devices that would operate in this same band spectrum as wireless microphones, known as white space. The co

Some of the original theory that Frank Whittle went through as the proof of the ability of the gas turbine is simple engineering and fairly easy to follow even at the technician level. With the advantage of 60+ years we can obviously see ways to improve on the original. Some of the initial comments

If you missed last Saturday's story called Cars That Run on Rails, it's not too late to check out this 1950 Dodge Coronet. According to the description in the ad, not only is it a seven-passenger limousine, but it was specially built for executive transportation on the Boston and Maine railroad,

From Medgadget: When you fail to drill in the heart, you go offshore. Apparently, that's what Kirkland, Washington-based Pathway Medical Technologies has done. After the company failed to implement its atherectomy system for coronaries back in 2004, the company pressed ahead, and n

From Innovation: The 21st Century Begins Now,� proclaims the October issue of Esquire. To make its point, the magazine will come with a battery-powered digital cover that flashes the tag line. This animated brush with science fiction uses admittedly simple technolog

From Engadget: Filed under: Transportation Though we're hesitant to believe something this fantastic could actually be implemented in real life, word on the pavement has it that Audi is currently running a pilot program that informs motorists "how fast to drive to catch a green li

From BBC News | Technology | World Edition: The first official image of a proposed joint Russian and European manned spacecraft is unveiled. It is designed to replace the Soyuz vehicle currently in use by Russia and will allow Europe to participate directly in crew transportation.