he Engineering Community across India is celebrating Engineers Day every year. If we ask the date of celebrations to Engineering students they may kill them by asking…Engineers Day, what?..we don't hear etc.etc.We cant find any fault in these Engineering students behavior.Becuase a most percentage of colleges never celebrate this occasion. So talented students are unaware of these celebrations. Engineers' Day is celebrated on 15 September every year.The day is the birthday of Sir Mokshagundam Visvesvarayya, an eminent Indian engineer (from College Of Engg., Pune(COEP)) and statesman born in Muddenahalli-Kanivenarayanapura in present day Karnataka. He served as the chief engineer during construction of Krishna Raja Sagara on the Kaveri River near Mysore. He also built many dams in the Bombay presidency (present day Maharashtra). The dams built by him are still functional even today, a testimony to his brilliance, skill, honesty and dedication. So 15 September, Engineer's Day 2011, is quite a remarkable tribute to the greatest Indian Engineer Bharat Ratna M. Visvesvarayya.
What are the disadvantage of biometrics?
The Disadvantages of Biometrics are the following:
* The finger print of those people working in Chemical industries are often affected. Therefore these companies should not use the finger print mode of authentication. * It is found that with age, the voice of a person differs. Also when the person has flu or throat infection the voice changes or if there there are too much noise in the environment this method maynot authenticate correctly. Therefore this method of verification is not workable all the time * For people affected with Diabetes, the eyes get affected resulting in differences. * Biometrics is an expensive security solution.
Is magnetic coupling or inductive coupling are same?
A plain mag coupler uses magnets to replace the field and armature coils in a brushless dc motor. Then two shafts are coupled together, but to remain coupled they have to be synchronous (rotating at the same speed). If one shaft has a drive motor and the other has the load (fan blades for example) if the load exceeds the maximum torque they slip and are no longer coupled together (the blades will stop turning until the motor stops and restarts).
A mechanical inductive coupling has a squirrel cage similar to an induction motor. This allows the transmission of torque without having to have the same speed.
Also, inductive coupling can refer to transmitting electrical power through coupled inductors or a transformer.
Why are hexagons used as the basic cell shape?
If you analyze the way bees construct the honeycomb, the hexagonal structure gives the greatest strength and the largest number of cells in a given area using the least amount of wax.
If you are talking about knives, a bolster is the part that connects the handle to the blade. French style bolsters look perfectly round in profile. German style bolsters look oblong, sort of like a flattened French bolster.
What are two ways to increase the amount of thrust a rocket produces?
If the mass flow rate through the rocketâ??s engine is increased, then the thrust will be higher. Another way to increase the thrust amount is to increase the exit or initial velocity during takeoff.
Is there a computer program to measure Cobb angle from the X-ray picture?
yes, we can do it by using NI VISION LAB VIEW SOFTWARE.
Why do you want to join in banking sector being a engineering graduate?
During my engineering i am not much career oriented,but after my graduation i am having a tremendous interest in banking due to my family background.Apart from that since banking is a back bone of any country,so i really want to be part of it.As banking offers tremendous growth opportunity.Bank employee have respect in society,since there is direct interaction with customers.one of the major reason is job security especially in public sector bank.Last but not the least banking provides challenging work environment.
Why is stainless steel dangerous to weld?
stainless steel contains chromium. chromium gives off toxic fumes when heated.
Why demin water water PH kept high?
It is normaly due to sodium leakgae out of the cation resin bed .
The distance of Proxima Centauri is about 4.4 light years ... roughly (186,252 mi/sec times 31,536,000 sec) = 2.469 x 1013 miles. Taking the earth's average distance from the sun as 93,000,000 miles, the visual apparent maximum angular separation at the distance of the Alpha Centauri system is tan-1(9.3x107/2.47x1013) = tan-1(3.77x10-6) = 2.16x10-4 degrees = 0.78 arc seconds Granted, these numbers are all very rough, but the answer is certainly good to within less than an order of magnitude. From the distance of even the nearest star, you'd have to be pretty clever to detect the presence of planets bound to the sun.
Why PRDS used in thermal power plant?
they work parallel to power generating turbines. The only difference between prds and turbine is that prds give only process steam by simply reducing the pressure of incoming steam while a turbine generates power out of that pressure reduction, and also give left out steam as process steam.
What are the advantages and disadvantages of personal area network?
Advantage is PAN users can move without much concern of their mobile devices I/O redundancies. Disadvantage is the PAN has limited transmission range about 10 meters.
What is the difference between should be and to be?
the difference is obvious, You should be a bride or you are to be a bride. (should=could (sorta) and to be = you will be.
Is computer science better now?
no , not yet . and it takes some time to recover. compare to computer science it is best to choose mechanical or civil or chemical
What is priming in the marine boiler?
Priming is a carryover of entrained water with the steam into the engines that affect the turbine blade, break cylinder heads, piston, valves.
What is the Difference between a Dielectric Test and a Megger Test?
a megger or hipot test involves raising the voltage of the wiring to 2x the operating voltage + 1000v
answer volts/amps or ohms
Dielectric test usually a sample of the oil is taken from the transformer
answer is in ohm-cm
dry devices will have the dielectric tests on file ...
this is a very poor excuse ... the code need rewriting.
the old standards were based on porcelain, oil, paper and cotton AI MI SWC DWC
new types THN THWN THHN SO are generally based on a natural color when the tests are done
so if you replace a cord on a drill the white and green wire has insulation that crumbles while the black is still flexable.
thermoplastic insulation used for several years in damp locations with DC turns to a sticky goo.
What type of micrometer is easiest to read?
A digital micrometer is the easiest to read as it displays the exact reading on a screen.
Comparative chart for 1G 2G 3G and 4G GSM technology?
Dates
Cool New Features
1G
70's to 80's
Wireless phones (cellular) are introduced, primarily for voice only.
2G
90's to 2000
Increased performance achieved by allowing multiple users on a single channel. More and more cellular phones are used for data as well as voice.
2.5G
2001-2004
The Internet turns the focus towards data transmission. Enhanced multimedia and streaming video are now possible. Phones support limited web browsing.
3G
2004-2005
Enhanced multimedia and streaming video capabilities are increased. Standards are created to allow universal access and portability across different device types (Telephones, PDA's, etc.)
4G
2006+
Speeds reach up to 40 Mbps. Enhanced multimedia, streaming video, access and portability are increased still further. Devices are equipped for world-wide roaming.
Technology
1G
Analog
CMRT
AMPS
2G
Digital Circuit Switched
D-AMPS
GSM
CDMA
2.5G
Digital Packet Switched
GPRS
EDGE
3G
Digital Packet Switched
UMTS
W-CDMA
CDMA2000
4G
Digital Broadband
802.11
Data Rate
1G
9.6 Kbps to 14.4 Kbps
2G
D-AMPS
9.6 Kbps to 14.4 Kbps
GSM
9.6 Kbps to 14.4 Kbps
IS95A
9.6 Kbps to 14.4 Kbps
IS95B
115 Kbps
2.5G
56 Kbps to 144 Kbps
3G
UMTS
2+ Mbps, up to 384 Kbps
WCDMA
384 Kbps (wide area access), 2 Mbps (local area access)
CDMA2000
614 Kbps
4G
20-40 Mbps
Frequency
Carrier
1G
800 MHz
30 kHz
2G
D-AMPS
800 MHz or 1.9 GHz
30 kHz
GSM
800 MHz or 1.9 GHz
200 kHz
IS95A/B
800 MHz or 1.9 GHz
1.25 MHz
2.5G
800 MHz or 1.9 GHz
200 kHz
3G
UMTS
2 GHz
5 MHz
WCDMA
2 GHz
5 MHz
CDMA2000
2 GHz
1.25 MHz / 3.75 MHz
4G
In Development
In Development
Primary Countries
1G
Worldwide
2G
D-AMPS
USA
GSM
Europe
IS95A/B
USA
2.5G
Europe, Asia, USA
3G
Europe, Japan, USA
4G
In Development
What will happen when a stone is thrown from a moving train?
Throwing a stone from a moving train involves the same type of calculations as throwing a stone from a stationary platform. The difference is that you now consider the added horizontal velocity imparted by the moving train. If you throw forward, the train's velocity is added to your contribution to the stone. If you throw backward, the train's velocity is subtracted from your contribution to the stone. If you throw sideways, the train's velocity does not alter your contribution to the stone. Whether any of this matters or not depends on friction due to the different air velocities encountered by the stone. Vertical velocity is relatively unchanged by the train's contribution. The stone will still go up (if you include an upward vector in your throw) and it will still go down. The end result is that the stone will hit the ground at some point. That point will be relatively the same in both cases, except for the minor difference due to air velocity.
What have engineers done in the past?
They have built pacemakers, artificial joints, prosthetic limbs, polymer substances, and various other medical progressions. Less importantly, engineers have created cars, buildings, bridges, etc. In a sense, everything you see is either the direct product of an engineer or is made of the materials that an engineer produced.
What is International Gravity Formula?
how is the formula of (1+0.005279sin^2+0.000023sin^4) come from and what is a complete form of this formula?
please answere
Why is the lac regulatory system important to bacteria?
The lac regulatory system is a vital part of the bacteria. This is because, the most common source of food is sugar lactose and it is required by the enzymes all the time.