Interview Questions Answers in Electrical Engineering, Power Plant Engineering

Question { G&S Construction, 5106 }

We order Dyn 5 distribution transformer to a company. What arrives is Dyn 11. Is it ok to use this transformer.
It will be installed alone.

Answer

Yes

Is This Answer Correct ?

2 Yes

0 No

Question { Sreetech, 9141 }

what are upstream faults and downstream faults in power system

Answer

Upstream means incoming , downstream- the outgoing

Is This Answer Correct ?

2 Yes

2 No

Question { 3149 }

in catridge heeter watts =110, 260 v , i checked in multimeeter meeter shows 50 ohms but oms law r=v square /w
260*260=67600, and 67600/110=614.5 ohms how to caluclate exact ohms in heetre s

Answer

Electrical engineering is based on mathematics , your multimeter is either faulty or you did not pay attention to the range/ scale

Is This Answer Correct ?

0 Yes

0 No

Question { 4217 }

function of apfc pannel

Answer

APFC maintains the set pf automatically

Is This Answer Correct ?

0 Yes

0 No

Question { Tata Power, 4024 }

how the speed decreases of a generator in power station if load increases

Answer

Speed regulation i.e Load vs Speed ,as slip in electric motor as load increases

Is This Answer Correct ?

0 Yes

6 No

Question { KSEB, 2764 }

Why consider motor rpm to select capacitor for motor

Answer

Lower the speed ,higher the capacitor required

Is This Answer Correct ?

5 Yes

0 No

Question { 1910 }

How many percent of power are not being registered if we bypass one side of the meter base terminal using #8 cu wire on 1-phase kwhr meter.

Answer

50 % if the same wire is used for the current coil of the meter

Is This Answer Correct ?

1 Yes

0 No

Question { 2674 }

3ph line voltage 220v, how can run a 220v single ph motor or Light?

Answer

Connect the motor to two phases

Is This Answer Correct ?

4 Yes

1 No

Question { UltraTech, 2794 }

diffrence between abcb and mocb

Answer

ABCB - Air blast , MOCB - Minimum Oil

Is This Answer Correct ?

3 Yes

0 No

Question { Matrix, 18023 }

why do we use LPF wattmeter not UPF in the experiment of no load and blocked rotor test of 3phase slipring induction motor?

Answer

In both the cases the pf is very low

Is This Answer Correct ?

2 Yes

17 No

Question { 2134 }

when the flux enters into saturation mode then what will be the secondary voltage of the normal t/f?....high or low ? explain ...how?

Answer

After saturation ,secondary voltage will not increase

Is This Answer Correct ?

2 Yes

0 No

Question { 3275 }

Due to the sensitive earth fault Our Power plant Get Tripped Several Times, It happens in the morning time daily, When temperature rises that means sun rises the earth fault current get lower, in this situation What should I do to get rid of this Problem?

Answer

See whether temperature compensation can be provided

Is This Answer Correct ?

0 Yes

0 No

Question { 7069 }

Why we not use the impedance relay in protection of short transmission line ?

Answer

The impedance too small to be measured

Is This Answer Correct ?

0 Yes

1 No

Question { 4015 }

i have 2kv ups how many watts batteries is required

Answer

The number of batteries required is decided by back-up period and load i.e. energy to be stored

Is This Answer Correct ?

3 Yes

0 No

Question { HCL, 18684 }

3,12,24,33,_ ,75,150 Find the missed number in this sequence

Answer

66 ( add 9 ,double ,add 9 ,double..... )

Is This Answer Correct ?

34 Yes

1 No

k.prakashchandra