Answer Posted / hemant

WHEN CLOUDS STRIKE THEY PRODUCE -VE CHARGE ,& FOR DISCHARGE THEY NEED THE ZERO POTENTIAL AT EARTH.IN TELECOM WE R GROUNDING THE -VE TERMINAL OF SUPPLY TO MAKE IT ZERO POTENTIAL .IF WE GROUND THE +VE TERMINAL THEN ALL THE EQUIPMENT WILL DAMAGE OR FIRED BECAUSE CLOUD WILL CHOOSE LOW RESISTANCE
+VE CHARGED ANTENAS.THAT IS THE REASON WE USE -48V.

How to arrange a hous hold earthing system to keep minimum earth resistance( below 7ohms).

2067

---

why electron produce magnetic field when it is in motion?

2191

---

What are the parameters of water ( Water quality )to be monitored in Centralised HVAC ( water cooler chillers )

2121

---

which connection is safer series or parallel?usually which connection we prefer at home?

10176

---

how many electricity poles are there and what are the names and their sizes.

1969

---

What is the unit of attenuation?

1119

---

ult of expression 'document.FrmQF.myem

2130

---

If we impress a dc voltage of 230 V on an unloaded 230 V, 50 Hz transformer it wi A give high secondary voltage B burn out C give secondary voltage as per K D none of these

2068

---

What are the basic component of a cro?

1292

---

There are a trformer and an induction machine. Those two have the same supply. For which device the load current will be maximum? And why?

1203

---

How to design the no. of ceiling fans required in 5mtr X 10 mtr X 3 Mtr hight room?

2209

---

what is mean by D.O. in distribution line poles?

1748

---

Explain about Leakage Test.

2095

---

In our factory so many iron pillors are exists for supporting the shed/Hangar. If do more no of earthings at one piller instead of doing more earth pits in many locations and running earth strip around the hanger, I can save the money. Please suggest this method is acceptable as per Is specifications though the Earth resitance of the farthest piller is with in the limits as per IS specifications.

2177

---

What is the abbreviation of NGT panel

2084

---