Engineering Answers

What are the possible causes and remedies of engine Low oil pressure?

Sketch the waveform of the following signal: x(t)=del(cos t)

Determine the inverse z-transform of X(Z)=e^z, ROC:all z except |z|=infinity

. Consider the variability of the vowel characteristics among speakers. If humans can create a phoneme from similar vocal tract shapes, but with different speaker identifiability, then the source and prosody must play a large role in speaker characteristics, as well as the vocal tract. A ventriloquist, for example, can keep his/her vocal tract in roughly the same shape (i.e. for a particular phoneme), yet mimic different voices. Offer an explanation in terms of source and prosodic characteristics.

A feed mixture of A and B (45 mole % A and 55 mole % B) is to be separated into a top product containing 96 mole% A and a bottom product having 95 mole% B. the feed is 50 % vapor and reflux ratio is 1.5 times the minimum. What is the equation of the feed line? Determine the number of ideal trays required and the location of the feed tray .Given αAB = 2.8

A mixture of benzene and toluene containing 40 mole % benzene is to be separated continuously in a tray tower at a rate of 200 kmol/h. the top product should have 95 mole% of benzene and the bottom must contain more than 4 mole% of it. the reflux is a saturated liquid and a reflux ratio of 2.0 is maintained. the feed is a saturated liquid (i.e. it is at its bubble point)

a.obtain and plot the operating lines for the rectifying and the stripping sections on the x-y plane.

b.What is the boil-up ratio?

The vapour-liquid equilibrium data at the operating pressure of 101.3 kPa are given below.

X 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

Y. 0 0.21 0.38 0.511 0.627 0.719 0.79 0.853 0.91 0.961 1.0

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A mixture of 40 mol% benzene and 60 mol% toluene

is being flash-distilled at a rate of 10 kmol/h at 1 atm

total pressure. The liquid product should not contain

more than 35 mol% benzene. Calculate the amounts

and the compositions of the top and the bottom products.The relative volatility of benzene in the mixture is 3.Solve analytically.

x ^ 3 - 3x * y ^ 2 + 3x ^ 2 - 3y ^ 2

1. A piston – cylinder containing steam at 700 kPa and 250 deg C undergoes a constant pressure process until the quality is 70%. Determine per kilogram (a) change of internal energy and (b) change of enthalpy.

a series resonance network consisting of a resistor of 300 ohms ,a capacitor of 120 micro f and an inductor of 20 mh is connected across a sinusoidal supply voltage which has a constant output of 9v at all frequency.calculate,the resonant frequency,the current at resonance, the voltage across the inductor and capacitor at resonance, the quality factor and the bandwidth of the circuit.also sketch the corresponding current waveform for all frequencies