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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. 
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Motor Configurations and Loads
2009-09-21 14:58:00 if i connect 5 KW motor in star or delta.how much motor take current in no load and load.plz expalin in both case in star and delta? More About: Motor
Did Drilling Contaminate Wyoming's Drinking Water?
2009-09-21 14:55:00 The U.S. Environmental Protection Agency is investigating the source of three contaminated wells in Pavillion, Wyoming . The wells tested positive for a chemical that is commonly used in the natural gas drilling process of hydraulic fracture. The issue is raising concerns about the future use of natu More About: Water , Drinking , Drilling
Power Factor
2009-09-21 14:49:00 Hi The trans former Details given below is Connected for this transformer how to calculate the capacitor rating in idel condition already we connected 10 KVAr capacitor for compensation of power factor but the power factor is fluctuating to 0.5 to 0.93 Transformer Rating - 500KVA More About: Power , Factor
New Hope for Steam Power?
2009-09-21 14:37:00 Ever since I visited Pennsylvania's Strasburg Railroad as a child, I've been interested in steam locomotives - as much for the rugged beauty and romance they seem to convey, as for the amazing fact that these massive machines worked at all. That water, when held under the right conditions, is capabl More About: Power , Hope , Steam
How to Slow a Cut-Off Wheel
2009-09-21 14:27:00 Tough one: what would be (a) way(s) to at least slow if not stop a 6" (or smaller) standard cut-off wheel on an angle grinder being used in a limited access situation on an installed metal component (plate) in order to sever it ? Would tire rubber fastened to it be any good ? More About: Wheel , Slow
Dynamic Breaking in Hydro Generators
2009-09-21 14:07:00 Dear All, By shorting Three phases of generator (Stator side) how Dynamic breaking is Acheived. What happens in the genetator so that rotor comes to zero speed? Regards, Vaithiyanathan More About: Hydro , Breaking , Generators
Calculating Pipeline Thickness
2009-09-21 13:42:00 how to calculate the pipe thickness for certain pressure & velocity for water & other lequids. by raju
Southwest Windpower - Customer Complaints?
2009-09-21 12:08:00 Hi All, Southwest wind generator seems the most popular small wind generator in the world, as far as I know. I'm going to install one at my back yard. But when I will send email to the company center to get a packing list and price list from them and show them my interest, just get no respo More About: Customer
Flange Mass Calculations
2009-09-21 11:38:00 how do i calcuate mass for 50mm thk , 3500m diameter flange More About: Mass , Calculations
Steel Bar Weight Calculation
2009-09-21 10:30:00 Hello , How do i caculate the weight of a solid steel bar? regards Mr morris More About: Weight , Steel
Solar Energy
2009-09-21 08:48:00 Dears, In our country, due to shortage of electric supply and due to high temperature I planned to build a house and use a solar energy for electric supply since the solar energy is available in my country as well as to save the environment but the problem I don't know how to start and how many More About: Energy , Solar , Solar energy
Bearing Sleeve with Radius Formation ID
2009-09-21 08:34:00 Dear all, Well i have to manufacture a bearing sleeve with process involving cutting, machining, Marking, Heat Treatment, External and internal grinding. I have a problem in internal grinding. I need a radius of 5240 in ID and also to finish its length at the same time. Ca
Electrical Conduit Through Concrete Floor
2009-09-21 07:10:00 Your helpful comments would be appreciated here: I need to run future wiring through a concrete slab floor. The floor above will be a greenhouse on the second floor. We will pour 6" of concrete. I've set four 1" sched, 40 PVC electrical conduit in place to handle the future wiring, anticipated More About: Electrical
DIY Grape Arbor (Part 2)
2009-09-21 07:01:00 Part 2 of the grape arbor series involves putting up the structure. Here, I received a whole new appreciation for pipe fitting. I used a framing square and a flexible welding ruler to lay out the angles so they could be cut with an acetylene torch and then cleaned up with a power hacksaw. More About: Part
Mass Flow Meter - Calibration and Commissioning
2009-09-21 06:11:00 how to do the mass flowmeter calibaration and comissioning in power plants? More About: Mass , Flow , Meter
Overhauling a Small Hydro-Electric Power Plant
2009-09-21 05:07:00 My partnership aquired a mill in New Braunfels, Texas on the Guadalupe River with a hydro plant built in 1922. The builders undersized the Frances turbines made by Leffel & Co. The Z36 turbines cannot operate the Westinghouse generators at the specified 150 rpm. Our head is low - 7 feet and wate More About: Power , Small , Hydro , Electric , Plant
Population Bubble?
2009-09-21 03:53:00 We saw the Dot Com bubble, then the Housing Bubble where prices zoomed upwards, then crashed. In nature, we see herds grow and flourish when food is plentiful and population zooms up, and then crashes in disease and starvation when food is over-grazed. It's even considered good wildlife management t
AutoCAD 2006 Dilemma
2009-09-21 03:50:00 Hi all! I've had a few problems with my AutoCAD 2006 installation for awhile since using a reg cure type product. I've managed to sort all but this last one:- while fencing a selection of 'lines' to perform an action all goes well BUT, if I want to make a second selection, the first selecti More About: Dilemma
Unusual Area: CR4 Challenge (09/22/09)
2009-09-21 00:01:00 This week's Challenge Question: The given figure shows two concentric circles. Line XY is tangent to the inner circle and its length is 2 inches. With the given information, determine the area of the annular region between the two circles. The Answer will be posted right here on CR4 o More About: Area
kia sportage
2009-09-20 22:17:00 hi everybody . i own a kia sportage 1996 , 98000 miles went for a drive to shops engine cut out , engine light came on tried to start , run lumpy then stalled engine light appeared . i am also after obd 11 code reader whats the chances as obviously koreans like to keep secrets as do the germans .
Wiring of UPS connected appliances
2009-09-20 19:38:00 Dears; In our country, due to short fall of electric supply, there is tending to use local manufactured UPSs for domestic use for fans lights etc. The electricians whom do the wiring job for those UPSs in homes normally connect one wire of UPS with common (Neutral) wire of home wiring and secon More About: Wiring , Appliances
Pressure per square inch
2009-09-20 16:32:00 What would be the pressure in pounds per square inch on a flat surface at these depths of water in the ocean; 100 feet 500 feet 1500 feet 2500 feet 3000 feet More About: Inch
chloride removal
2009-09-20 15:41:00 can we remove chloride from water without using reverse osmosis or anion removal resins
USA Gas Pumps Don't Compensate for Hot Gasoline
2009-09-20 14:42:00 Another legal way to steal from consumers: The amount of gasoline in a gallon pumped during the summer months .. I live in the desert and this just irks me every time I pump gas in the summer. Which leads me to wonder, when is the gas in the underground tank coolest, if the temperature More About: Pumps , Gasoline
Transfusion for Single-Use Devices
2009-09-20 14:36:00 The high cost of waste disposal and burgeoning operating costs have prompted many healthcare facilities to reconsider medical device reuse. The literature seems unsettled on this issue: some studies confirm the patient safety and economic benefits of single-use device reprocessing while others cite More About: Devices , Single
Is There a Robot in Your Future?
2009-09-20 14:36:00 Remember your favorite sci-fi robot, or maybe Rosie from The Jetsons? Now there was a robot, able to do everything from taking care of the kids to cooking dinner. Industrial robots have become a reality, but their domestic counterparts lag behind. Will there be a killer app that leads to widespread More About: Robot , Future
Structured Maintenance and Training Join Hands
2009-09-20 14:36:00 Reliability centered maintenance (RCM) requires careful analysis of equipment failure modes, regular equipment monitoring, and preventive maintenance procedures to work. Training can make or break an RCM program, because training also requires careful analysis, regular monitoring, and a plan to keep More About: Join , Hands , Maintenance
grounding of aa high way fence
2009-09-20 13:20:00 = A fence protecting a high way ,11 meter away there is wires on a tower 230kv how can i ground the fence? = the wires at 28m high ,39m high and 50m high , 3 phase circuit on a tower , what effect (induced voltages) on the fence steel wires and posts and how can I calculate for there groundin More About: High , Fence
Question on making inverter using TL494
2009-09-20 13:12:00 Hi there. I want to build a inverter using TL494 .I have just read the datasheet of TL494 and find some difficulties. There is a input to the oscillator, the datasheet states that the oscillator frequency is determined by that . Is the output frequency equal to this oscillator frequency ? More About: Question
Improving welding environment
More articles from this author:2009-09-20 12:54:00 Now a days being part of OHASA certification every employer need to provide safe work environment in their work facilities. Is ther any model designs available in terms ergonmics for permanent welding stations and to provide smoke free ( welding fume) environment by installing smoke purifiers,etc. a More About: Environment , Welding 1, 2, 3, 4, 5, 6, 7 |
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