dheeraj yadav


{ City } faridabad
< Country > india
* Profession * engineer
User No # 109270
Total Questions Posted # 1
Total Answers Posted # 12

Total Answers Posted for My Questions # 0
Total Views for My Questions # 1283

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Questions / { dheeraj yadav }
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I have 4 busbar of 1000 ampere. we use 4 busbar to make 4000 ampere in one phase.my problem is that when we applied 60% load on that then busbar produced high noise.what is the reason of that and how can i minimize that noise.

College School Exams Tests,

Electrical Engineering 1283



Answers / { dheeraj yadav }

Question { 2360 }

on 22.03.2015 at 17:15hrs Y phase 66kV class Power Trf-2 Current transformer has flashed over and oil came out. The failed CT has been replaced on 24.03.2015 at 13:15hrs and the Trf has been charged in presence of RT Hassan after conducting the pre-commissioning tests. On the same day at 17:00hrs the commissioned CT has again flashed over and immediately the Trf  has been isolated from power supply. It is confirmed the secondary is not opened and checked the earth integrity and is found ok. Here what would be the reason for the CT failure? 


Answer

It may be cause due to meter internally circuit open the secondary of ct in meter.due to circuit problem.

Is This Answer Correct ?    0 Yes 0 No

Question { 1716 }

The coulomb is a unit of:(a) Energy(b) Voltage(c) Power(d) Quantity of electricity


Answer

D

Is This Answer Correct ?    3 Yes 0 No


Question { 4686 }

The power dissipated by a resistor of 10ohm when a current of 2A passes through it is:(a) 0.4W(b) 20W(c) 40W(d) 200W


Answer

40 W

Is This Answer Correct ?    14 Yes 0 No

Question { 12486 }

A current of 2A flows for 10 hour through a 100 ohm resistor. The energy consumed by the resistor is:(a) 0.5 kWh(b) 4 kWh(c) 2 kWh(d) 0.02 kWh


Answer

4 Kwh

Is This Answer Correct ?    27 Yes 2 No

Question { 4063 }

Electromotive force is provided by:(a) Resistance’s(b) A conducting path(c) An electric current(d) An electrical supply source


Answer

A conducting path and electrical supply source

Is This Answer Correct ?    2 Yes 2 No

Question { 2533 }

The unit of current is the:(a) Volt(b) Coulomb(c) Joule(d) Ampere


Answer

Ampere

Is This Answer Correct ?    3 Yes 0 No

Question { 5836 }

In order that work may be done:(a) Two wires are necessary(b) The circuit must have a switch(c) Coal must be burnt(d) A supply of energy is required


Answer

A supply of energy is required

Is This Answer Correct ?    13 Yes 1 No

Question { 2065 }

The ohm is the unit of:(a) Charge(b) Resistance(c) Power(d) Current


Answer

Resistance

Is This Answer Correct ?    0 Yes 0 No

Question { 3172 }

The unit of resistivity is:(a) ohms(b) ohm millimetre(c) ohm metre(d) ohm/metre


Answer

Ohm meter

Is This Answer Correct ?    0 Yes 0 No

Question { 5752 }

Voltage drop is the:(a) Maximum potential(b) Difference in potential between two points(c) Voltage at the end of a circuit(d) Voltage produced by a source


Answer

Difference of voltage between the starting to the end point.

Is This Answer Correct ?    6 Yes 1 No

Question { 3320 }

Rccb trip or not with out neutral connect in three phase welding machine


Answer

Rccb connected in circuit for protection against earth fault.whether neutral connected or not.if any phase is earthed then Rccb triped.

Is This Answer Correct ?    3 Yes 1 No

Question { 4022 }

difference between ground,neutral and earth?..


Answer

Ground and earth is for only circuit protection.
And neutral is for voltage balance in circuit.

Is This Answer Correct ?    16 Yes 1 No