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what is the difference b/w KVA and KW? the transformer are mentioned KVA rating and the loads are mentioned KW.why?
2 2619ii) A shunt motor supplied at 230V, runs at 900 rpm when the current is 30A. The resistance of the armature is 0.4 ohms. Calculate the resistance required in series with the armature to reduce the speed to 600 rpm, assuming that the armature current is then 20A. [12]
1854iii) A shunt motor runs at 70 rad/sec from a 460V supply and takes in an armature current of 100A. Resistors of 2.52 ohms and 1.64 ohms are connected in series with the armature and in parallel with the armature respectively. The field excitation remains direct from the 460V supply but the generated torque is halved. Determine the new running speed. Neglect brush voltage drop. The armature resistance is 0.4 ohms. [15]
1 1955I am new in work for 1 of our project we have some instrument in BOM including Pressure, Temp. and so on, I also noticed some objects like pressure switch process HOOK UP; which I don't know what does "HOOK UP" mean here.
3 4677Why are transmission lines multiples of 11? Is it because of some historic reason ? Or is there a scientific base to it?
5 5184What all are important things keep in mind while designing and executing the water storage tank works?
1 4152how the length effects the ampacity of the cable? if a cable is carrying a current of 100A for 50m length then what will the effect on current if we double the length?
2 4079
can any body sand me previous exampapers of jr. engineer (mechanical)
what is the condition for YnD11
On a 3 winding transformer YNynd11, how do you apply REF protection to the Delta tertiary winding that is supplying auxiliaries to a substation?
How does a battary stores charge in it? please explain in simple manner and in detail.thanks
explain working principle of earth leakage relay
Explain what is a voltage transfer curve of an op-amp?
is it possible to test of bus bar in high rise building without completed full floor ?
why ,in CE configuration amp the output is 180 deg phase shift....?
How to disiegn DCV circuit ?
Dear sir, I completed DECE In the year 1995.Now i am working in a private company from last 10 years as an Electrical supervisor.The company having a 1000 KVA transformer.Now i try to apply "C" Licence. I am eligible or not.If not eligible,pls give solution.
Why o-ring, bearings are used in the centrifugal pumps?
What happens to the microstructure during service exposure?
What is endurance limit and what is its value for steel ?
What are the major sectors involved in aircraft maintenance?
what is an excitation table?
