Interview Questions Answers in Instrumentation, Electrical Engineering, Electronics Communications

Questions / { ulaganathan }

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Answers / { ulaganathan }

Question { Patni, 10925 }

who discoverd ohms law?

Answer

german scientist george simon ohm in 1827

Is This Answer Correct ?

17 Yes

0 No

Question { 10535 }

what is loop?

Answer

a loop may be defined as connection of elements
to the circuit making use of feedback.
It may be of open or closed type

Is This Answer Correct ?

6 Yes

1 No

Question { IFFCO, 8973 }

how the harmonics are generated in transforemer?

Answer

this is due to magnetostriction energy . whenever
ferromagnetic material during magnetization changes
therefore it results in a loss and this effect is
called as magnetostriction and this is the reason
for the generation of harmonics

Is This Answer Correct ?

5 Yes

2 No

Question { Siemens, 21726 }

how kva rating of transformer is calculated.

Answer

the kva of an transformer also depends on form factors.
the usage of kva 11,33,66kva all depends on form factor
as 1.11.

Is This Answer Correct ?

12 Yes

9 No

Question { Wipro, 12018 }

first 3 men were there .again 3 came.total how much?

Answer

the given question consist of 2 conditions,
assume it conditions as x;
for 1st condition is
1x=3
for 2nd conditions is,
2x=3
therefore adding,
3x=6,therefore x=2

Is This Answer Correct ?

0 Yes

9 No

Question { GE, 8206 }

what is meant by q factor of inductor?

Answer

Q FACTOR IS ALSO CALLED AS STORAGE FACTOR . IT IS
DEFINED AS THE RATIO BETWEEN THE INDUCTIVE REACTANCE
TO THE RESISTANCE OF THE MATERIAL

Is This Answer Correct ?

14 Yes

0 No

Question { Videocon, 31226 }

what is the difference between transmitter and converters?

Answer

AN CONVERTER IS ALSO CALLED AS RECTIFIER . SINCE
IT IS USED TO CONVERT A.C TO D.C. WHEREAS AN
TRANSMITTER IS AN ONE USED TO TRANSMIT THE SUPPLY
FROM 1CIRCUIT TO OTHER CIRCUIT

Is This Answer Correct ?

11 Yes

17 No

Question { Medha Servo Drives, 76440 }

what is the difference between venturi and orifice meters?

Answer

AN VENTURIMETER IS AN ONE IN WHICH CONSISTING
OF DIVERGENT&CONVERGENT PORTION IN THE INLET & OUTLET
WHEREAS AN ORIFICE VENTURIMETER IS AN ONE IN
WHICH CONSISTING OF INLET&OUTLET TO BE SAME WITH
CIRCULAR THROAT AT THE CENTER
THE DISCHARGE OF AN ORIFICEMETER IS ALWAYS HIGHER
THAN THE VENTURIMETER

Is This Answer Correct ?

38 Yes

43 No

Question { 24678 }

why rating of motor in HP?

Answer

actually,the answer to this question is,the ratings of
the motor must be in watts ,since dependent on
power ,therefore by using the formula,
1hp=740watts, this enables the conversion in
watts.
just to avoid higher ratings we are in use of hp

Is This Answer Correct ?

39 Yes

16 No

Question { IBM, 9729 }

Why is the electric shock from the DC supply is more
dangerous than the shock from AC supply.

Answer

peak value remains constant

Is This Answer Correct ?

0 Yes

3 No

Question { 11458 }

What is basic of instrumentation

Answer

the basic of instrumentation deals with only
measurement ,control of operation,handling the equipment

Is This Answer Correct ?

17 Yes

2 No

Question { 10144 }

Is there devices to convert mechanical energy/rotational
energy into electrical energy.......?
PLease suggest me....

Answer

piezoelectric crystals convert mechanical
energy(eg:pressure)to voltage and it also again convert
voltage to mechanical energy

Is This Answer Correct ?

6 Yes

1 No

Question { Sail, 7965 }

what is the main different between distribution transformer
and power transformer ?

Answer

in an distribution transformer the variation exist
between the voltage & current is not much but
incase of power transformer the range may be large

Is This Answer Correct ?

4 Yes

7 No

Question { Sail, 7965 }

what is the main different between distribution transformer
and power transformer ?

Answer

THE OPERATION OF DISTRIBUTION AND THE POWER TRANSFORMER ARE NOT VARIED TO WIDE EXTENT BOTH OF THEM ARE OPERATING SAME PRINCIPLE BUT THE ONLY DIFFERENCE IS THAT APLLICATION CONCERNED
WHEN USED IN POWER STATION CALLED AS POWER TRANSFORMER AND USED AT DISTRIBUTION AREAS DISTRIBUTION TRANSFORMER

Is This Answer Correct ?

0 Yes

1 No

Question { Adani, 31280 }

Can u start a tube light without a starter?

Answer

make two wires to be touched such a way they are
connected to supply, the spark makes to jump
between the ends

Is This Answer Correct ?

10 Yes

3 No