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

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Engineering Interview Questions

Questions Answers Views Company eMail

how we can make the connection among the phones?

Motorola,

2 6575

Why OLTC(On Load Tap Changing)transformer is not recomended for improving voltage instability?

2 6271

which site/city in India has all three(thremal,Hydal and Nuclear)power generaton facilities?

2 5217

Why generating voltage is limited up to 22kV?

4 7712

How many 1.5 ton A/Cs can run on 7.5 kw generator (diesel)?

2035

1. A bomber drops a bomb from an aircraft flying at 2000 km/hr. at an altitude of 7km. The speed at which the bomb will strike the earth would be

KNJ,

1909

WHAT IS TEAM SIZE IN CONSTRUCTION WORK

2 6299

While connecting bulb in Series/Parallel,there is any difference in glowing

3 6071

When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<

Lupin,

2155

Why the meters sonnected to metering core of CT are not damagedon event of a fault??? Explain the phenomena??

Schneider,

1 5346

Does the isolator has a making capacity????????

2 5356

How to determine earth fault level to set relay for a normal distribution system of 11 kV , 100 A load????????

TCS,

1 4219

why is the number of turns different in current and potential coils of wattmeter..?

1 3636

Why the Transformer connection is changing in different transformer?(Like Star & Delta,Delta & Delta,Star & Star,Delta Star) From that connection where it is used?

2 7034

1)What will happen when 240 VDC supply is connected to 240VAC supply(DC supply +ve is connected to phase of AC supply & DC supply is to neutral of AC supply). 2)Also what will happen when 240 VDC supply is connected to 240 VAC supply in reverse polarity as of Sr. No 1.

2 4905

Un-Answered Questions { Engineering }

Mention the quality parameters.

Give the topology of current amplifier with current shunt feedback?

1213

hai now i am working as a electrical design engineer in construction field can i get a job in oil and gass field or power plant project as a electrical design engineer?

1922

Can you tell me more about pu systems (per unit systems )calculation in large power systems? how to get the base for voltage and power in generator, transformator and transmission lines?

2292

Can you provide an example of a situation where you used data-driven insights to optimize production processes?

Advantages of using generator circuit breaker (GCB) scheme in a power station ?

5280

1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?

2276

What is the indication of leaking starting valve of an engine?

2173

Define closed loop control system.

1085

How to Calibrate Radar Level Transmitter in Field

1243

If any one's require of phoenix contact like( relay , termilnal block , surge protection device ) , product please contect me 09878206357 chetan verma

2110

why traction voltage is 25kv

2219

aternator every parts and its working

1625

why does a microprocessor generally hAVE more address lines than data lines?

1969

What is the maximum cylinder head temperature of a 1200 KW, 12 cylinders DG set

1941

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