A waste-water stream of F = 1 m3 /h with substrate at 2000 mg/l is treated in an upflow packed bed containing immobilized bacteria in form of biofilm on small ceramic particles. The effluent substrate level is desired to be 30 mg/l. The rate of substrate removal is given by the following equation

                   

By using the following information, determine the required height of the column (H). k = 0.5 h-1, X = 10 g/l, Ks = 200 mg/l, L = 0.2 mm, α = 100 m2 /m3 , A = 4 m2 , η = 0.8

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#Question id: 14516

#Section 1: Engineering Mathematics

The probability that a man aged 50 years will die within a year is 0.01125. The probability that out of 12 such men at least 11 will reach their fifty first birthday.

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#Question id: 14517

#Section 1: Engineering Mathematics

The probability that a certain beginner at golf gets a good shot if he uses the correct club is 1/3 and the probability of a good shot with an incorrect club is 1/4. In his bag are 5 different clubs, only one of which is correct for the shot in question. If he chooses a club at random and takes a stroke, the probability that he gets a good shot is

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#Question id: 14518

#Section 1: Engineering Mathematics

From a pack of cards two are drawn, the first being replaced before the second is drawn. The probability that the first is a diamond and the second is a king is

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#Question id: 14519

#Section 1: Engineering Mathematics

One of the two mutually exclusive events must occur, if the chance of one is 2/3 of the other, then odds in favour of the other are

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#Question id: 14520

#Section 1: Engineering Mathematics

Given =1/3 and 2/3 then P(B) is

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#Question id: 14521

#Section 1: Engineering Mathematics

There are 64 beds in a garden and 3 seeds of a particular type of flower are sown in each bed. The probability of a flower being white is 1/4. The number of beds with 3, 2, 1, and 0 white flowers is respectively