A water sample is analysed for coliform organisms by the multiple-tube fermentation method. The results of confirmed test are as follows: Sample Size (m/) Number of positive result out of 5 tubes 5 Number of negative results out of 5 tubes 0 3 0.01 0.001 0.001 1 4 The most probable number (MPN) of coliform organisms for the above results is to be obtained using the following MPN index. 2 MPN Index for various Combination of Positive Results when Five Tubes used per dilution of 10.0 m/, 1.0 m/ and 0.1 m/ Combination of positive tubes MPN index per 100 m/ 0-2-4 1-3-5 4-2-0 5-3-1 11 19 22 110

Q: B- The weight of a sample of substance is 750 gm and has a volume of 500 cm' with a moisture of 12%,…

A: Given data in question  Weight Volume Moisture content  To find out  Bulk density

Q: Why is the Coliform and E Coli bacteria measurement is commonly used as the main microbiological…

A: E. coli is commonly used as a faecal pollution measure. It is also commonly used as a measure of…

Q: A: Density bottle test: Sample 1: Dal = 0.9982 x (83.49-62.12) (251.31-62.12) - (264.41-8 = 2.58…

A: SampleDensity, g/cc12.5822.6132.6242.5352.5662.57

Q: In surveying a laboratory, a health physicist wipes a contaminated surface and runs an absorption…

A: There is a possibility that the contaminant is radium-226, which has a beta particle range of up to…

Q: The disinfection process is used to deactivate the pathogenies microorganisms in water. Consider…

A: To calculate the necessary chlorine dose for disinfection, we consider chlorine demand caused by the…

Q: A BOD analysis was conducted on a raw sewage sample. 300 mL of sample was placed in a 300 mL BOD…

A:

Q: (a) A strain of E. coli bacteria taken from a sample of waste water in a treatment plant are…

A: (a) N = Aekt (i) A/q at t=0 N = 20 So, 20 = A * ek*0 or, A = 20

Q: If a specimen has a factor of safety of F.S. = 1.2 Dead Load + 1.6 Live Load = 1.2 DL + 1.6 LL, and…

A:

Q: True or False: When comparing two samples of equal mass, the number of particles in each sample is…

A: Answer:- 1. The given statement is true. The number of particles and number of moles are directly…

Q: 10-1. In a 5-day BOD test, the initial DO concentration was 7.8 mg/L and the final concentration was…

A:

Q: . Why PFR is more efficient than CSTR?

A: In the PFR the flow of fluid through the reactor is orderly with no element of fluid mixing with any…

Q: Assuming that the specific gravity of the following substances is approximately the same, that is,…

A: The objective of the question is to calculate the time it will take for a particle of gravel to…

Unit Conversion

Standard units are also called SI units. SI units are used for measuring a physical quantity satisfying certain conditions. There are two types of units: fundamental units and derived units. Fundamental units are physical quantities that are independent, that is, they do not depend on other quantities like mass, length, or time. There are plenty of quantities in our lives which need to be measured and compared. Measuring is the comparison of a particular physical quantity with its reference value. A unit is a measure of a fixed physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.