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

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Engineering Interview Questions

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Question 89 - A hemocytometer is a device that is used for counting cells. In an engineering experiment, 100 microlitres of cell suspension is diluted with 50 microlitres of Trypan blue dye. Only death cells appear blue in color when stained with the dye. There are 57 cells detected in a hemocytometer, where 5.3 % of them appear blue when the chamber of the meter is placed under a microscope. Each square of a chamber can contain 0.0001 mL of liquid. (a) Calculate the number of viable cells. (b) The cells ocupied 5 squares. Calculate the average number of viable cells / square. (c) Calculate the dilution factor of the cell suspension by using the formula : Dilution = final volume / initial volume. (d) Calculate the concentration of viable cells / mL by using the formula : Concentration = (Average number of viable cells / square) x dilution x (square / volume).

1 4493

in the farm,water tank of 8000 litter capacity situated in 12 meter above.Farm owner want to lift 7000 litter of water within 7 minute to water tank of 12 meter above.which motor having HP rating is suitable for pumping??

ABB, Anchor, Havells, Keltron, KSEB, L&T, vguard,

1 3204

whats the reason behind SF fault on siemens PLC.please explain in detail.

Pakistan Cables,

1552

How can we measure the residual voltage in dc machines?

GPREC,

1791

why the neutral line is not giving shock to us if we touch it ?

GPREC,

1728

what is asynchronous data transfer???

1718

Plaster area is 1000 sqft thickness is 12 mm so what will be the quantity of cement and sand

1 2479

we have two generators different capacity on 15 MW and other 6MW at 11 KV , 15 MW gen. bus short level current 40KA,and 6MW short level current 25KA,, length of cable 100MTR between 6 MW from 15MW gen. for bus coupling . kindly tell any one can we use both NGR OR one NGR from any GEN. BOTH NGR has diff. rating. Tariq pakistan

RYK Mills,

1626

Define the "All - Day Efficiency" of a Transformer

Transco,

1 3327

4 stroke engine have how many suctions

Varun Motors,

1 3409

How Much the Lean concrete Density?

Techno Unique Infratech,

2745

Which colour of earthing wire

Aravali,

1 2547

how convert the spiral model to prototype model ?

1668

How to convert milliampares into flow??

1672

We are dealer in Maharashtra State & We have recd. form C from dealer of Maharashtra State against our E-1 form. Now assessing authority is asking for counterfoil of our E-1 form. But, our E-1 form counterfoil is misplaced somewhere & assessing authority is disallowing the C form which is recd. from Maharashtra State.Please let us know the option for allowing C form?

1 2407

Un-Answered Questions { Engineering }

(1) In turbine, what does term CDP, NI, NH, HSSOC, means. (2) What is the purpose of LO overhead tank in turbines.(3) An equipment is certified for EEX, IA, IIC,T6, what do you under stand by this.(4) what is SURGE, and how it is prevented, what is the purpose of bypass valve across AS valve.(5) Give 2 application of quartz crystal used for process parameter measurement.(6) what is meant by cold float of compressor shaft. (7) state four different types of flow measurement. For gas flow measurement mmscfd is the common unit. Expand the unit and specify significance of word S in the unit.(8) what is meant by Gap voltage, in vibration measurement. Normally how much Gap voltage is set and state the reason.(9) what will the new flow factor if D/P transmitter is Re-Ranged from 25” wc to 50” wc.(10) what is the usage of QDV & Volume booster.

3998

Explain capacitance?

992

hi i am electronics & telecomm engg & appling for apprentiship written test and interview. pls forward me the syllabus & old question papers.I will be very much thankful to you. pis inform to 88.avinashkalegmail.com

1836

What are the advantages and disadvantages of the k-map method?

1232

What is difference between limit state and working stress method? How it is applies in building structure.

2283

Area classification, Equipments, Gas groups, temperature classification, Ingress protection, Fire Extinguishers.

1938

What is the critical speed of shaft?

974

what is the difference between DVB-S& DVB-S2

1856

calculate the quantity of water for 1:6 cement mortar

2118

In grey iron sulpher was above 0.15% what react on metal?

1001

what effects a surging can produce in the compressor

1871

What are the parts of network management system (nms)?

962

it is possiblee to produce concrete with out cracks...

1869

What are some examples of a periscope?

1105

Why is tan-delta test and capacitor measurement done on alternator?

2168

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