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 3727

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 2277

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

Pakistan Cables,

1114

How can we measure the residual voltage in dc machines?

GPREC,

1223

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

GPREC,

1343

what is asynchronous data transfer???

1259

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

1 1808

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,

1228

Define the "All - Day Efficiency" of a Transformer

Transco,

1 2529

4 stroke engine have how many suctions

Varun Motors,

1 2649

How Much the Lean concrete Density?

Techno Unique Infratech,

2320

Which colour of earthing wire

Aravali,

1 1901

how convert the spiral model to prototype model ?

1264

How to convert milliampares into flow??

1277

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 1769


Un-Answered Questions { Engineering }

One thing you should remember while trying to solve a math series is that math skills are generally not that important, but rather a vulture’s eye is required to get a strong hold on the unusual, yet a craziest of the logical minds is. Keep this in mind and try to complete the sequence with the appropriate number: 201315, 71280, 9253, 212, ?

1468


What is maximum power transfer theorem?

649


Enumerate the procedure for obtaining loans from the financial institutions

5


Define blotch print?

1


who is your favourate actor in tollywood tellme about him in few points

2601






how to get electrical supervisour certificate in gujarat

1533


What is the use of divider?

643


Tell us about the working of a 6-stroke engine.

625


What is difference between slip rings and carbon burushes?

13926


Explain the biological neuron model. How is it different from artificial neuron?

620


The gauge indicates the number of amps, but what about voltage? How voltage rating (for wire or fuse) determined?

1524


What are the differences between microprocessor and micro controller?

583


What is difference between 2 quadrant & 4 quadrant digital dc drive.

2515


why normally Generator rating are between 11Kv to 22Kv?

3727


How much of fly ash is allowable in Portland cement and what is the disadvantage when the level of fly ash is increased?

1371