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CR4 - Recent Forum Threads and Blog Entries

Recent content from CR4, The Engineer's Place for News and Discussion

Published: Thu, 27 Jul 2017 13:33:19 EST

Copyright: Copyright 2017


Thu, 27 Jul 2017 13:33:19 EST

Science news is starting to read like science fiction. Unfortunately half of the stuff I'm reading sounds like the start of a dystopian novel. Take for instance this latest bit of news about genetic manipulation:

Solar Panels As Back-up Power Supply

Thu, 27 Jul 2017 11:50:04 EST

I recently got a quote for solar panels for my home. It would be 5.9kw at peak. It would have 20 PV modules and 4 Enphase Nighttime batteries. My energy bill is $158 per month average. The system would cost me $159 per month for 180 months. So, it would take me 15 years to realize any savings. Howev

Who Is Online - Link Not Opening

Thu, 27 Jul 2017 10:28:25 EST

To: cr4 admin. Whenever I open cr4, I open the link who is on line In the past 15 days, only on 3 occassions the above link has opened. whenever I open I get message as below. The following information is meant for the website developer for debugging purposes. Error Occurred While Processing Requ

BSW Instead of UNC

Thu, 27 Jul 2017 08:19:40 EST


Breaking of Tack Weld During Preheating for Welding

Thu, 27 Jul 2017 06:58:09 EST

It was observed that during preheating(150deg.C) (Before welding) time, the tack weld was getting cracked.Tacking was done by ER80S-G.(fillet weld) What is the reason for getting cracked.Tack weld length is 50mm

Dual Slope Transformer Differential Relay

Thu, 27 Jul 2017 06:15:38 EST

How the settings of transformer differential relay is fixed generally? 1. Pick up Current 2. Initial Slope 3. Cross over point to the second slope 4. Final slope

35 Most Popular Civil Engineering Interview Questions and Answers

Thu, 27 Jul 2017 04:52:54 EST

Here you will find most popular question amongst interviewer from civil engineering field and how to answer them click here to read more: Thank you.

Sperm Counts Drop Across the Developed Nations of the World

Wed, 26 Jul 2017 22:19:58 EST

Well this should come as no surprise to anybody, we've known for some time that female hormones from birth control pills was accumulating in the water, and as a result our food sources as well...Should we just go ahead and add testosterone to the water to even it out?....or should we adopt a filteri

Primary Feed-Phase Loss

Wed, 26 Jul 2017 14:07:41 EST

Recently we had a phase loss in our primary feed to our bldg. transformer. The transformer is delta - wye. The primary is side 7200 volts, the secondary being 480/277 volts. What voltages could possibly back feed through the lost phase in our transformer? Our 2000A main breaker to our main switch ge

Biomass Developing Issues in Sewage Treatment

Wed, 26 Jul 2017 14:03:20 EST

Dear ALL, Presently i am working in the sewage waste water is SBR PLANT. FAST 2 months i try to develop MLSS . I cant develop.inlet parameters are ph.7-8, tss-100-200,cod-150-200 & bod 50-60 mg/l, DO-3-4. I SEEN two much of white foaming in sbr /aeration tank.mlss not improving/incre

D-E-A-D dead: The Most Significant Cars That Definitively No Longer Exist

Thu, 27 Jul 2017 13:00:00 EST

Historically significant cars resurface all the time—found in barns, fields, subterranean caverns, even behind brick walls—quite often making news when they do. After all, their continued existence either confirms or denies decades’ worth of speculation about their continued existe

Demon Comes to Life

Wed, 26 Jul 2017 13:00:00 EST

There was a time, not so long ago, when it seemed unthinkable that a major auto manufacturer would even commit resources to creating a drag-race dedicated vehicle, but then came Cobra Jet Mustangs, Drag Pak Challengers and COPO Camaros. Factory race cars, just like back in the golden age of performa

Guess the Architecture for 7/25/2017

Tue, 25 Jul 2017 18:00:00 EST

Do you recognize this week’s building? Care to take a guess?

Second-Built Samba Discovered in a Field, To Undergo Restoration

Tue, 25 Jul 2017 13:00:00 EST

Had it not been for an ID plate that had remained with the bus – and a Volkswagen enthusiast with an eye for rare Wolfsburg tin – then a rare 1951 VW Microbus Deluxe left sitting in a German field for more than 50 years might well have become so much scrapyard fodder. Instead, it’s

Woman of the Week – Joycelyn Elders

Mon, 24 Jul 2017 20:30:00 EST

Dr. Minnie Joycelyn Elders is known for her frankness; progressive views on reproductive health and drug legalization and for having served as the first African American Surgeon General of the United States. Born in Arkansas to a sharecropping family, Elders graduated valedictorian of her class. Sh

UGV Gaskets for Electronics, Doors and Hatches, and LED Lights and Cameras

Mon, 24 Jul 2017 18:38:26 EST

Unmanned ground vehicles (UGVs) need rubber gaskets that can help protect sensitive electronics from high heat. UGVs also need weather-resistant door and hatch seals, and custom gaskets for cameras and LED lights that can handle extreme temperatures while keeping out water and dust. Manufacturers of

How To: Restore Plastic Headlamp Lenses

Mon, 24 Jul 2017 13:00:00 EST

Daily driving a 1988 Volvo 244DL is more fun than it should be. Five speeds, air conditioning, lumbar support, and an engine that will run forever. Like many cars of the era, however, the Volvo has large plastic lens covers on the headlights which have long ago given up their protective factory clea

Engineering the Perfect Bathroom

Sat, 22 Jul 2017 04:00:00 EST

If you’ve ever spent time lurking around the bathrooms of your local bars and restaurants, you might be struck by two things: A.) Women stand in line to use the bathroom much too long and B.) Women often leave the bathroom chatting away with a new friend. Now, thanks to scientists from Ghent

The Sailboat Diaries: Building a Bilge

Thu, 20 Jul 2017 18:07:06 EST

For what it’s worth, I’m several projects ahead of my blog updates. I just haven’t had as much time to blog lately as I would like. Let’s hope that changes in the near future. (Also, kicking myself right now for not naming this blog series Ship’s Log!) The bilge of my

End of Viper Production Signals Closure of FCA’s Conner Avenue Assembly Plant

Wed, 19 Jul 2017 13:00:00 EST

Fiat Chrysler Automobile’s Conner Avenue Assembly Plant is no stranger to hardship, having witnessed the decline of the spark plug business, along with the rise, fall, rebirth and ultimate death of the Dodge Viper. Changes to federal safety standards and declining demand will end Viper product