mention hazard experienced during installation

1936

I am going to appear RRB Sr. Section Engineer Exam, Electrical. Can you send me previous year questions of RRB Electrical engineer. specially Section Engineer questions. my email id is likerahulworld@gmail.com

1768

iam using DM 3251 voltmeter(1 percent accuracy)for 11KV system PT ratio is 11KV/110V.can anybody explain what is the max and min voltage deviation.

2214

Why arc quenching is used in Diode ?

2075

is it possible to say motor horsepower number without seeing name plate(when name plate damaged)

5228

i want to put single phase load on scott connected transformer,eventhough how to balance the transformer.

1796

armature is that part in which current is induced since in dc motor we supply current to the conductor so why we call it armature?

1854

working principle of oil startar

1845

What is power relay?

1197

What is kirchoff ’s current law (kcl)?

1037

how to calculate the mesh earth network resistance in such substation, is there any recommended resistance values with references , thanks!

2288

what is power factor ? how we can calculate the low power factor and amount of capacitor for improve that low factor ?

1571

Sir, My doubt on cable sizing calculation, Load:74 KW calculated cable 1 run 50mm2. Now client asking us to reduce cable size by increasing runs. Sir, My question now when my mind strikes with 2 options 1) Divide load 74/2 = 36 and calculate cable for 36+36 making it 2 runs or 2) Simply i can divide 50mm2 /2 ie. 2 runs of 25mm2 Please suggest me sir

1862

Work done in a free expansion process is

1107

how hazordious area is classified at an oil & gas plant and categorise suitable class of electric equipment in that area like induction motors, LCS, Lighting Fixtures Fluerescent/Flood lights Mercury& sodium lights, J.Bs, Power Cables etc

1800