List of practice Questions

Which one of the following statements correctly defines the concept of ‘Extended Producer’s Responsibility’?

Specific conductance is used in water analysis to indirectly estimate dissolved solids. The measurements used in the method account for

Ten litres of the sample was filtered through a membrane filter and the filter was transferred to solid agar media which supports growth of coliform organisms. After incubation at 37°C for 48 hours, the agar plates showed an average of 64 colonies per plate. What was the average concentration of coliform organisms (in CFU/ml) in the original water sample?

Reverse Transcriptase Polymerase Chain Reaction is an analytical procedure used in detection of pathogenic microorganisms. Which one of the following statements is NOT correct in this context?

Consider the following statements:
Statement 1: Goodrich method for reservoir routing is based on hydrologic flood routing method.
Statement 2: Muskingum method for channel routing is based on hydraulic flood routing method.
Which one of the following is correct?

The correct order of hydraulic conductivity for the geologic formations is

Centrifugal pumps with suction pipe (shown by solid arrow) and delivery pipe (shown by dotted arrow) are shown in the figures. Choose the option that gives the correct connection.

Carbon dioxide is used in recarbonation process. A solution has 1 mole/L supersaturated calcium carbonate. Estimated amount of carbon dioxide (in grams) needed to completely convert calcium carbonate to calcium ions in 1 litre solution is __________.

X is normally distributed with the following data (25.8, 36.6, 26.3, 21.8, 27.2). Select the correct statement about X ($t_{\text{crit},\alpha=0.05,4}=2.132$):

Assuming $s>0$, the Laplace transform for $f(x) = \sin(ax)$ is

Given $P$ is an $m\times n$ matrix, $Q$ is an $n\times l$ matrix, and $R$ and $S$ are $n\times n$ matrices. Consider:
Relationship 1: \quad $(PQ)^T = Q^T P^T$
Relationship 2: \quad $(RS)^{-1} = S^{-1} R^{-1}$
Which one of the following is correct?

A capillary tube is attached horizontally to a constant heat arrangement. If the radius of the capillary tube is increased by 25 \% , then the rate of flow of liquid will change nearly by:

Nylon-6,6 is obtained from:

For an isomerization reaction \( A \rightleftharpoons B \), the temperature dependence of the equilibrium constant is given by: \[ \log_e K = 4.0 - \frac{2000}{T} \] {The value of \( \Delta S^\circ \) at Hook is, therefore:}

Find the wrong number in the series. 3, 31, 131, 351, 739, 1343, 2211, 3291, 4931

The structure of H\(_2\)O\(_2\) is:

Ortho and para forms of hydrogen have:

Let 

Then the number of elements in S ⋂ T is