BE Biomedical Engineering Semester 2 (FE First Year) - University of Mumbai Important Questions

Write short note on atomization.

Mention four drawbacks of plain carbon steel.

Give two purposes of alloying.

What is compaction in powder metallurgy?

Define Power Alcohol. 

Give any two advantages of power alcohol.

A sample of coal has the following composition:- C= 70% O=23% H=5% S=1.5% N=0.4% Ash=0.1% Calculate GCV of this fuel.

1.95 gm of coal sample was taken for nitrogen estimation by Kjeldahl’s method. The ammonia liberated required 9.5 ml of 0.4 N H₂SO₄ for neutralization. Calculate the percentage of nitrogen in coal sample.

Define Fuel Cell

Explain Hydrogen Oxygen Fuel Cell with a neat diagram.

Select the compound which possesses highest octane number and highest cetanenumber out of n-heptane, n-octane and isooctane. 

Define bio-diesel.

give advantages of bio-diesel.

A gaseous fuel contains H₂=50% CH₄=30% N₂=2% CO=7% C₂H₄=3% C₂H₆=5% and water vapours=3%. Calculate weight and volume of air for 2m3 of the gas.

1.56g of coal sample was kjeldahlished and `NH_3` gas thus evolved was absorbed in 50ml of 0.1N `H_2SO_4`. After absorption to excess (residual) acid requires 6.25ml of 0.1N NaOH for exact neutralisation. Calculate the percentage of N in the coal sample. 

What is cracking? Explain in detail – fixed bed catalytic cracking. 

Explain the determination of % moisture and % volatile matter in a coal sample.

A sample of coal was found to contain the following constituents. C = 81%, O = 8%, S = 1%, H = 5%, N = 1% and Ash = 4%. Calculate the minimum weight and volume of an required for the complete combustion of 1kg of coal.

Define octane number

Define cetane number.