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Blog Details for "Conference Room 4 (CR4)"
Conference Room 4 (CR4)Conference Room 4 (CR4)Conference Room 4 (CR4) is a forum for engineers, scientists and technical researchers to discuss engineering news, seek technical help and get answers to burning questions. Articles
440v(AC) to 5v(DC) Using Resistor Network
2012-02-09 12:27:00 Hi all, I need to convert 440v (ac) to 5v(ac) using resistor network, can anyone help me with this? regards rimpul
Cross-Section for Interaction of Relativistic Neutronium Cable With Atoms
2012-02-09 11:13:00 Hi Folks; I had a question about the de Broglie wavelength of relativistic particles and the cross-section of such particles for interaction ,or more to the point, of contact with a line made of some form of solid, somehow, stabilized neutronium. Basically, I am assuming that a somehow stabilized More About: Cross
bending of galvanised pipe
2012-02-09 10:11:00 Hello, I have a 6inch pipe,bended to 90degree almost,to be galvanised by dipping. We normally galvanisng on stright pipes only. if anybody have experience in doing galvanisng on bend pipe please share the procedure,equipments and holders of dipping the same. Thx and Regards, RR
As Comes Valentine's Day, There Goes Chocolate
2012-02-09 07:01:00 A ritual seemingly for uncreative male lovers (I consider giving chocolate a relationship death stroke), a heart-shaped assortment really gets across that message of "I love that you love chocolate and I remembered." "It is the east, and Juliet is the sun." via Wikimedia So where did this tra More About: Valentine , Chocolate
Pipe network-arriving system curve
2012-02-09 06:54:00 Hi,I've a doubt with Hardy Cross Method, for one assumed flow at inlet, i've found flow divided into each tank with satisfying the conditions of Hardy Cross Method through iterations. Similarly for 2nd, 3rd,... assumed flow also i found flow divided into each tank. But to plot the System curv More About: Curve
How do you rectify an open transmission cable buried in the ground.
2012-02-09 06:10:00 Hi. I was in a job interview once and the interviewer asked me this question (stated above). He also asked how I will find the open cable. Can anyone please help me on this question? Thank you very much. More About: Ground , Open
Linear Slides and You: A Tutorial
2012-02-09 06:05:00 The linear slide: the engineering response to DJ Casper's Cha-Cha Slide. DJ Casper via Communigate | Crossed bearing slide via Isotech "Slide to the left. Slide to the right. Crisscross. Crisscross. Cha-Cha now ya'll. " Maybe not so much. Linear slides neither crisscross nor cha-cha. I've also
Tendering
2012-02-09 05:55:00 Dear Sir How to quote a tender for any project ie, (IT/Residential/Commercial) ? what r the things i have to consider(Excise duty, vat etc), tell me the formula for the and from wher i can get the rates of excise duty, vat etc?
3000 hp motor (4160 v) starter
2012-02-09 05:51:00 In the reduced voltage starter using an auto transformer (80% tap) for the above motor, should the WYE be made prior to energizing the auto transformer or vice-versa? A SEL 710 motor protection relay makes the transition from WYE (start) to DELTA (run). Thanks. More About: Motor
ASME section VIII Div 1 - Code Case 2695
2012-02-09 05:21:00 What is code case 2695. I heard that code case 2695 uses design by rules requirement in Part 4 of ASME Section VIII - Div 2 to design components for Section VIII DIV 1. Under what conditions it is applicable? More About: Code
Chinese Single Line Diagram Symbols
2012-02-09 05:10:00 Hi Everyone , I got some chinese SLD's.In those diagram i cannot able to identity some of the symbols.Here are the three symbols. Click the link if you can't able to see the image .Click the link. http://s14.postimage.org/7x48dlua9/chines e.png Anyone have idea about wht they represent. More About: Chinese
Different codes for Designing & manufacturing Pressure Vessel
2012-02-09 05:07:00 Is it acceptable to design pressure vessel by AD-Merkblatt and manufacture the same with ASME? If No Why? If yes, Any such example available? More About: Designing
DP MCB or 1P+1N MCB for 1 Phase supply.
2012-02-09 04:53:00 For utility company 240V, 1 Phase power supply to your premises, what will you prefer for Main switch 1P+1N MCB or 2P MCB and why?
Material info
2012-02-09 04:45:00 I need below material properties of 17 Ni Cr Mo S6-4 + HH and S470M, Ultimate Tensile strength- Yield Strength - % Elongation- Poisson's Ratio- Modulus of Elasticity - Fatigue Limit- More About: Info
Material Info
2012-02-09 04:37:00 I need below material properties of 17 Ni Cr Mo S6-4 + HH and S470M, Ultimate Tensile strength- Yield Strength - % Elongation- Poisson's Ratio- Modulus of Elasticity - Fatigue Limit- More About: Info
Porosity in Steel Sand Castings
2012-02-09 01:27:00 I need help in solving a porosity problem in a steel casting valve body poured in SS316. We see porosities,small in size in various areas inside the housing bore after machining. Our customer is particular that the housings should be 100% free of these small voids. The foundry has done everyth More About: Sand
If 3V Battery Power Won't Light A 4.5V LED Will It Still Drain The Bat
2012-02-08 21:52:00 I'm using a 7 day programmer to light an LED. The output voltage is 1.5V so I was thinking of adding 3V to a 4.5V LED and when the timer comes on it will supply the last bit of voltage needed to light it. This will save using a relay circuit. Is this a good idea or will the batteries still drain eve More About: Battery , Light
World of the Reptilians
2012-02-08 19:26:00 What do you think of this reptilian world, possible? How much centripital force in order for a reotilian to walk in their world bottoms up? Possible?
The Miraculous NASA Breakthrough That Could Save Millions of Lives
2012-02-08 19:25:00 From Gizmodo: There are no hospitals in space. The closest E.R. is back on Earth, and astronauts can't exactly jump in a cab to get there. So what happens if the sun burps out a massive blast of radiation while an astronaut is space-amblin' by? Read the whole article More About: Lives , Millions , Nasa
Odd Tech Pairing: Salmon DNA and Nanoparticles
2012-02-08 19:21:00 From DVICE: It sounds like a joke, but it's not. Nanoengineers and biologists are working on a memory device from salmon DNA and silver nanoparticles.The non-volatile memory device is a write-only-read-many (WORM) variety, just like an optical disc. Read the whole article More About: Tech
IBM Tips Into Microscopic Manufacturing
2012-02-08 19:14:00 From CNET News: Fabrication is moving to the nanoscale, aided by a super-hard tip 10,000 times smaller than a pencil point that could be used for microscopic biosensors and optical probes. Read the whole article More About: Tips
Motor Spec
2012-02-08 18:49:00 3 phase induction motor, 415V, 50Hz, 4 pole and 5~10HP needed specs rated amps P.factor efficiency speed stator & rotor winding resistance and inductance mutual inductance inertia & friction factor More About: Motor
Difference Between Pipe and Tube
2012-02-08 18:39:00 I need to know the material composition difference between pipe and tube More About: Tube
Lead and Follow and Get Out of the Way
2012-02-08 17:00:00 Something I've always admired about many of my engineering brethren has been their determination and drive to find the best answer to solving a problem, not just an answer to solving a problem. While a lot of folks take comfort in the saying, "There's more than one way to skin a cat", most engin
Book On How To Define MIL SPEC Part Number For Screws, Bolts Etc.
2012-02-08 17:00:00 Hi folks! I´m from Brazil helping my engineering dept to solve some problems... I would like to know if there is any kind of publication that teaches / helps you to define MIL SPEC part numbers for mechanical parts as screws / bolts, etc. Any kind of help will be highly appreciated. Dan More About: Book , Part
Machining
2012-02-08 16:35:00 How would you go about machining a 20mm hole in a flat piece of metal...the hole must have a very good finish...
Solar Startups Stepping Forward
2012-02-08 15:30:00 Image Credit: ArrayPower The prospect of solar grid parity is becoming more of a reality every day. In 2010, the LCOE (levelized cost of electricity) for PV solar was $.150/kwh, fairly close to other sources - nuclear is $.10, coal is $.08, and natural gas is $.064. Particularly responsible f More About: Solar , Startups
SIA Flashback ? Bubbletop Cars: The Future That Never Came
More articles from this author:2012-02-08 15:00:00 The car of the future invariably has a clear bubble canopy. Sure, it might have some nifty technology or an atomic engine, but if you really want to get the point across that this is what people will be driving 10 or 20 years hence, you give it a bubbletop. For SIA #114, December 1989, Jim Hockenhu More About: Future , The Future , Flashback 1, 2, 3, 4, 5, 6, 7 |
