Engineering Questions and Answers

  • Why is it bad to weld cast aluminum?
  • Why is it better to use iron to build bridges rather than stone or steel?
  • Why is it that my 1993 Ford Festiva gets better gas mileage than most current economy models?
  • Why is my glass rod not getting charged even when i rub it silk cloth or paper?
  • Why is not possible to plug a battery back up to an inverter?
  • Why is Otto cycle called constant volume cycle?
  • Why is sound insulation provided by small building elements such as trickle ventilators expressed as Dn,e?
  • Why is steam power engine not used commercially anymore?
  • Why is steel not used to make foil?
  • Why is the formation of a supersaturated solution necessary during precipitation hardening?
  • Why is the live/hot wire fused and not the neutral??
  • Why is the main voltage in USA 110 volts and Australia 240 volts ?
  • Why is the symbol for a pound lb.?
  • Why is the tower of Pisa considered as the leaning tower?
  • Why is there a loud sound when a transformer bursts??
  • Why is there a pressure change in an absorbtion cloumn??
  • Why isn't there a smart enough artificially intelligent robot yet?
  • Why isn’t there a reverse microwave oven to cool food quickly?
  • Why lifts r made up of steel?
  • Why mercury light fittings are not suitable for street lighting?
  • Why might a toy manufacturer be interested in polymer properties?
  • Why most of engineers are joined in software field and why they leave their own field like chemical,mechanical
  • Why most people don't know about this car water invention ?
  • Why must you short out the secondary terminals on a current transformer when removing the ammeter from circuit
  • Why negative voltages are used in telephone lines?
  • Why people being electrocuted either thrown away from electric wire or pulled in by fores of electricity?
  • Why pixel interpolation may be required if rotation is applied to a bitmapped image ?
  • Why potential equivaliser is required for window type current trasformers?
  • Why pumping has to be done during the excavation?
  • Why ratings of electric generator are in KVA and not in Kilo Watt?
  • Why ratio detector is not sensitive to the amplitude change of incoming singal?
  • Why should I attach coaxial cable to the ground for conduction purposes?
  • Why sometimes electrical engineer use 40A breakers type MCCB and sometimes he use 100A but type MCB?
  • Why Spark Plug Misfires when uses in voltage limiter circuit.?
  • Why the hardness of Austenitic Manganese Steel castings increases after use?
  • Why the picture signal is amplitude modulated and sound signal frequency modulated?
  • Why the Steel structures of the WTC towers dissaperared, melted, or evaporated like by magic ? Bush knew it ?
  • Why the winding of inductor for crystal radio cannot being overlapping to each other.?
  • Why their is difference?
  • Why there are two grounds in 8086 microprocessor?
  • Why there is a long gap between abroad and India in civil engineering ,?
  • Why theres no volt between neutral from supply and star/star transformer supplyin laod?
  • Why this alloy as described below virtually does not consists of martensite?
  • Why to join electrical engg?
  • Why use Delta transformers at all?
  • Why use solar cells?
  • Why was the Philips screw invented?
  • Why we don't use 2nd and 4rth angle projection in orthographic projection?
  • Why we need grounding/earthing on our electrical system ?
  • Why we use 4..20ma as a standard?why cant it be 5..20 or something else other than starting with zero mA?
  • Why weak acids are more corrosive?
  • Why will fluorescent light glow in microwave oven?
  • Why wont my estes hydrogen fuel rocket launch? Please help?
  • Wich are the colleges in chennai offering marine engineering courses?
  • Wihch is bteetr ? The USA 2-pin pulg or the UK 3-pulg pin? Why we hvae 3 pin awnyay? Saetfy?
  • Will a solar panel generate more electricity facing the sun than not, or does it not matter?
  • Will adhesive thread-locking (i.e. LocTite) work on a bolt that is not torqued, like an adjustment screw?
  • Will an LED work as a flywheel diode?
  • Will my laptop's 90w power supply be a problem with an airplanes 75w power port?
  • Will robots rule the world?
  • Will science ever answer all questions perfectly and work without drawbacks?
  • Will someone explain the basics of mechanics to me!?
  • Will the US ever move to the metric system?
  • Will there be a new form of transportation in the future?
  • Will this circuit work?
  • Will two smaller motors connected together perform like one larger motor?
  • Wind generators?
  • Wind turbines have no power lines?
  • Windkessel! ( Four element)?
  • Wireless communication???
  • Wireless Signals?
  • With a BS in cell and molecular, could i take this job?
  • With modern building materials why are buildings not more aerodynamic?
  • Within four years of engineering how i can prepared myself.in what programs i have to engage myself?
  • Would a 35KW wind generator produce enough electricity to heat and light a 1100sq. ft. home?
  • Would a ballast regulate current alone or EMF as a whole?
  • Would a blanket with magnetic strips be practical?
  • Would a double 4" v-grooved channel welded together to form the letter "E" be stronger than 8" channel?
  • Would a sugar plumb be straight?
  • Would like to know the min & max parameters for luminosity on a factory workshop floor?
  • Would like to know what type of LED bulbs available in India to run on 240 VAC?
  • Would water be a good fluid for VC cooling systems?
  • Wound rotor motor lead identification?
  • Wt do tou think iitjee 2007 AIR 500 will go at? and AIR 1000 and AIR 1500?
  • X rays for your laptop??
  • X-Ray Defraction, lattice parameter calculation with D and HKL?
  • Y do i fail in first year of engineering?can any one tell me?
  • Y doesnt some wattmeters hav non uniform readings?
  • Yagi-uda antenna?
  • Year 12 electronics again lol?
  • You advice for engineer students?
  • You do 150 J of work on a machine and the machine does 90 J of work as a result. What is the efficiency of the
  • Zener diodes and Zener breakdown?
  • Zinc anodes?
  • Zinc plant?
  • Zt = impedance total, Ir = resistor current, Ic= capacitor current, Vs= voltage source , Yt= total admittance?
  • "ANFIS in Electrocardiography"?
  • "how much electricity does a light bulb use?
  • "In 1895 Sivasanker Thalpad of Bombay had constructed an aircraft which flew to an altitude of 1500 feet."
  • "natural sine" table on a engineering compass?
  • "tons of refrigeration"?
  • ( In three phase system ) Whats the difference between line voltage and phase voltage?
  • (1) Which of these items is most likely to weigh about a gram?
  • (5sin4t,8cos4t,5t^2 + 16t +3)?
  • (Electronic circiuts) : When a circuit is not dependent to it's frequency?
  • (GLASS KILN'S) 240v 40 amp ?
  • ***glass floor in my house what thickness glass do i use***?
  • ***what happens if high tension electric wire break and contact with the sea******?
  • *I am looking for Ideas* With either an engineering/math degree(bachlors) is it possible to have a job at home
  • . Explain how the 3to8 decoder can be built using two 2to4 decoder which has active-high enable (E) input and?
  • ??trebuchet??!!??!?!?!?
  • [1" pipe] means radius 1" or diameter?
  • [s there a web site that is purely on the repairs of electrical control systems of generators?
  • 1 Mahcine with 6 Simple Machines?
  • 1)Wtz the diff b/n Electrical grounding n electronic grounding.?
  • 1. Air is moved through 90 deegrees in which of the following fans?
  • 1. Are all Modern X-ray machines produces radio active substance?
  • 1. What energy is used to lift school bag?
  • 1.Explain the difference between the H and P method?
  • 1.Explain the difference between the H and P method?
  • 1.How many sides does a polygon with an interior angle measure of 120 degrees have? Show your work.?
  • 10 HORSE POWER = how many watts?
  • 10 points for the right answer?
  • 1000kg of scrap iron is to be melted using an open electric furnace.?
  • 115,000,000 kWh per year is equivalent to how many KW?
  • 15HP Escalator 20HP elevator name plate specifications?
  • 165 cm is equivalent to how many in terms of feet and inches?
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  • 19.5 volts in kilojoules?
  • 1m/3 of lead has a mass of 11,300kg, what is its relative density?
  • 2 houses on 1 meter ittakes 140 sec. for ten revs.of the meter 1 house takes 90 sec.what % is each house topay
  • 2 questions for Statics class.. can someone help? (if you can handle it)?
  • 2 quick questions on HVAC?
  • 2 student get 3 and 3.5 in their class exam And 1.2 and 1.45 in final exam respectively .?
  • 20,000 hz soundwave?
  • 200kva generator. what will be tha maximum load. what are some factors to be consider.?
  • 220 AC versus 120 AC?
  • 220 divided into 1000?
  • 220 divided into 1000?
  • 220 divided into 1000?
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  • 24 Gauge Enamel coated magnet wire?
  • 240 (UK) to 110 (US)?
  • 25 million dollar prize for green house gas capture thing?
  • 3 element boiler drum level?
  • 3 factors causing distortion in welding?
  • 3 identical lamps in a parallel accross 300 volt supply and total current is 3 amperes,?
  • 3 lights in series have resistances of 3,5,7, operate on a 9v battery what is the current in the system?
  • 3 phase 480 volts in each wire?
  • 3 phase electricity?
  • 3 storey building i want to install mains operated with battery back smoke heat detectors?
  • 3 types of levers?
  • 3 years diploma in ECE from Delhi is equivalent to 10+2 in regards to appear in IEEE, JEE can I appear?.?
  • 3" pipe lenth 20 ft how is volume of water in it?
  • 3=7(k-4), solve for k?
  • 32 scale ruler.?
  • 3D vector analysis?
  • 4 car batteries in series and need 3mps current to melt metal.?
  • 4.What are some procedures for safety in the laboratory?
  • 4093 Schmitt Nand?
  • -40F = -40C At what other temperatures are they the same?
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  • 4x4x4x4x4 as a power of 4?
  • 5 ways of increasing the capacity of a cellular system?
  • 50 cwts = how many tons?
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  • 6 Stroke IC Engine. Heard news that few engg. students in India developed this type of IC engine?
  • 6.4 x 8.741= show in significant figures?
  • 67 Watts Of Power How Long To Charge 12 Volt 600 amp battery?
  • 8. In European countries, the normal line voltage is 240 V. If a?
  • 8.Explain how you could use dynamic frequency analysis for a time related problem.?
  • 800kva is equal to how many amps?
  • 87.4 ml of milk at 18.6oC are added to 470.5 ml of coffee at 94.3oC?
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  • 9-11 engineering question. Why do we need demolition crews for buildings?
  • 911. Why did the building collapes?
  • A = integral of [x * dirac_delta(t-4) dt] from -infinity to +infinity?
  • a 120-v circuit contains a load with a resistance of 15ohms.What resistance must be added in parallel with the
  • A 1-mile long copper wire has a resistence of 10 ohms. Whats will be its new resistence when it is shortened b
  • A 2 story garage 30'*26' The 2nd floor supported by a steel beam how big will it need to be @ the 30' span
  • A 24 volt battery is connected to 4 lamps (all joined in series) What is the voltage rating of the lamps?
  • A 24volt AC transformer rated at 20 va, How many amps is it suppling?
  • A 40 kilo stone broken into 4 different pcs. with this 4 pcs u can have any weight betw. 1 & 40. Find it?
  • A 5400 ohm resistor is rated at 1.5watts.what is the maximum safe working current?
  • a 75kva ,3 ph. 460v ac primary down to 208v ac secondary.?
  • A amplifier with negative feedback?
  • A ball is travelling with a speed of 35m/s when it make contact with a wall. (question continues in detail)?
  • a baterry has 6 cells.each with internal resistance?
  • A bedroom is 10 ft by 11 ft. How much baseboard is needed to go around the room?
  • A block of unknown metal measures 10cmx10cmx3cm. The block has a mass of 760grams..what is the density?
  • A boat floats in water on a bridge. Do the supports have to be stronger than if there were no boat?
  • a buttterfly at eye level is 17cm infront of a plane mirror. you are behind the butterfly, 50cm from the mirro
  • A cable to the top of a tower makes an angle of 35 degrees with the level ground. At a point 100 yards closer?
  • A car is hauling a 90-kg trailer, to which it is connected by a spring. The spring constant is 2400 N/m. The c
  • a car moving at 20m/s slows to a stop in 6.5 seconds. What was the cars acceleration?
  • A certain light bulb with a resistence of 95 ohms is labeled 150 W. Was this bulb designed for use in a 120 V?
  • a circuit has a current of 10.0A. Calculate the number of electrons that pass in the circuit in 1s?
  • a conductor that's described as a 750 MCM wire has an area of whar?


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