Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

what is cogging in motors?

1 6053

What is the function of RCCB? What are the different sensitivity ratings & each application?

Wipro,

6 35139

What are the details of ratings of different types of ACSR conductors?

2 9740

Which type of DC generator is used for electric welding purposes and why?

1 5535

i applied for the ap transco please forward the freqventley asked QA

1964

Amoung all classes of electric machines, why the transformer uses oil as one medium of cooling?

4 7571

we often use the word HT (high tension) line.or we say HT switch gear, whats does HT basically mean. is it different from high voltage.

2 5893

we often use the word HT (high tension) line.or we say HT switch gear, whats does HT basically mean. is it different from high voltage.

1 3646

What is the difference between MPCB and OLR?

ABB, Raj Agencies,

11 59495

in three pin plug point, whats the reason that one plug point is bigger in size

4 6918

how to calculate cable bending angle in a trench?

Eastern Cement,

2 11350

give me the details of anti pumping relay

2 5230

what are the main hormonics in ac?

1 2616

what is use of substation? Any book on how to instal or construction of substations?

Siemens,

6 13585

How many losses in generators? how we can reduce them? and also in motors,transformers?

1 2686

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Un-Answered Questions { Electrical Engineering }

what is alluminium arm in ab conductors

1939

hi, i have 3x200KVA and 2 x 80KVA UPS with battery bank of 150AH 68Nos. and 100AH 204Nos., i need to install AC either ductable or PAC type, so can you help me to calculate heat load and capacity of the AC to install.

2692

how does WTI work ?

1938

What happens to voltage when current is zero?

1240

whate is the meaning of balance/unbalance,in stabilizers type

2105

how to test reverse power trip?

4429

what is LSR?

2137

WHICH SIZE A.B.CABLE IS USED FOR 11KV.

2151

why the projects getting loss?

1890

2358

Draw the equivalent circuit of crystal oscillator?

1281

I have 1500/1A CT If i connect this CT in 6.6KV bus bar means what will be the voltage present in CT?

1963

1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.

1977

What are high pass filter and low pass filter? and What are the flowmeter ?

1948

What is the general system requirement of alternator?

1812

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