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

A concentric, counter-current heat exchanger is used to cool lubricating oil. Water is used as the coolant. The mass flow rate of oil into the heat exchanger is 0.1 kg / s = FO. For oil, the inlet temperature TIO = 100 degree Celsius and the outlet temperature TOO = 55 degree Celsius. For water, the inlet temperature TIW = 35 degree Celsius and the outlet temperature TOW = 42 degree Celsius. What is the mass flow rate of water in kg / s, FW needed to maintain these operating conditions? Constant for heat capacity of oil is CO = 2131 J /(kg K) and for water is CW = 4178 J /(kg K). Use the equation (FO)(CO)(TIO – TOO) = (FW)(CW)(TOW – TIW).

1 2846

why don't we use the generator as a motor? and what will happen?

1905

How much cost will come for 900 sq ft cement plastering

Sharq,

1 5558

Load 380kva eb 415v,load amps 350.Same load dg 415v,load amps 420 what reason ?

AVT Natural Products,

1 2638

Dg pf .71 i am improve pf 0.80 what capacitor connected in dg how?

AVT Natural Products, EMC,

1692

how to calculate heat? i.e one glass water heat how much kelvin?

AVT Natural Products,

1 3208

why the Steam Turbine(20MW)center line and gear box center line not in same elevation during coupling alignment ?

Greenesol Power Systems,

3 5535

1.Can we use 6.6/11KV 300sq mm xlpe 3core cable for LT use (415 Volt). 2. If we use it for LT then what is the current rating

1781

What is wheel chamber in steam turbine?is it impulse blades are called wheel chamber in the steam turbine?

1 9662

What is the over speed in turbine? What is critical speed?

3 7273

what is the procedure for auto tune in masoneialn 12300 series displacer type transmitter?

1657

What is the least count of micrometer

Alfa Laval,

5 10013

1 *2 1*3 *2*4 1*3*5 *2*4*6

1792

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DRDO,

2088

How to calculate wire length,size & current? ( related to control panel)

FSS, GK Controls, Panel Tech,

2189

Un-Answered Questions { Engineering }

How many bricks are there in 100cft?

1275

according to the painting co efficient, we should take the one side of doors (or) windows or both sides?

1798

what is arc flash and what are the hazards involved

2183

In reclamation works what are the importance of geotextiles and sand?

1162

Hi, I am appearing for the ISRO exam for the post of Scientist/ Engineer to be held on 26th April,09. Can anyone help me regarding the same? I want to know about the exam pattern and the syllabus. If anyone could share your experience or sample papers for the same at khadhar786@rediffmail.com? It would be very useful for me. Thanks.

2150

How shall i select the value of capacitor or inductor in a system?

1919

how to select the automotive wire size by mathematical calculation. for xenon headlamp with ballast. the ballast given data voltage 10-17v,current permenant 6amp, run up phase is 15amp, peak at swicth on max 400micro sec is 40amp.the sum of cable resistance is 150mohm.please provide referenc document if any for relating the peak at switch on current,time & wire wire size

2391

why only exciting current is shown not primary current in transformer???

1887

If specific gravity of cement is less than 3.15 what is the cause?

2325

how to calculate insulation level of transformer?

1701

he compression ratio for a petrol engine generally lies between

1319

What’s the normal transformer current rating?

1055

sir,please send me the questions and syllabus for ongc technical assistant exam for electronics and comm

2390

Hi,can anyone help me out with PhD programs related to Instrumentation field?I have a degree in electronic Instrumentation?

1944

why the exchang voltge is in minus polarty i.e -48 instead of +48

2067

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