MICROBES IN AQUATIC ENVIRONMENT QUIZ

Removal of solids is generally considered as a

Tertiary treatment

Primary treatment

None of these

Secondary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

Because it can be used with a variety of media and allow a resuscitation step the __________ technique has become the common and often preferred method of evaluating the microbiological characteristics of water.

membrane filtration

Winogradsky

MUG

most probable number

TRUE ANSWER : ?
YOUR ANSWER : ?

Hyphomycete fungi

produce nonmotile tetaradiate conidia

grow in leaves and the infected leaves are the preferred food source for some aquatic insects

both (a) and (b)

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Metabolism of dissolved organic material released by phytoplankton allows heterotrophic bacteria to become part of the particulate organic matter that is passed up the food web to be metabolized and released as mineral elements and CO2 at each transfer. This sentence describes the

Winogradsky column

microbial loop

Redfield ratio

Gibbs free energy

TRUE ANSWER : ?
YOUR ANSWER : ?

The amount of oxygen dissolved in hypolimnion water in the winter is __________ to/than the amount of oxygen dissolved in hypolimnion water in the summer

lesser

approximately equal to

greater

half

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following species in water reveal the presence of fecal pollution of human or animal origin?

All of these

Clostridium perfringens

E.coli

Fecal Streptococci

TRUE ANSWER : ?
YOUR ANSWER : ?

Coliforms are used as indicator organisms because

they are present wherever enteric pathogens are present

both (a) and (b)

None of these

a testing procedure with great specificity is easy to perform

TRUE ANSWER : ?
YOUR ANSWER : ?

Trickling filter comes under

none of these

tertiary treatment

secondary treatment

primary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

All of the following species are considered coliforms except

Klebsiella pneumoniae

Salmonella typhi

Escherichia coli

Enterobacter aerogenes

TRUE ANSWER : ?
YOUR ANSWER : ?

Chemical precipitation of phosphorus is

tertiary treatment

secondary treatment

both (a) and (b)

primary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?