MICROBES IN AQUATIC ENVIRONMENT QUIZ

All of the following species are considered coliforms except

Escherichia coli

Salmonella typhi

Klebsiella pneumoniae

Enterobacter aerogenes

TRUE ANSWER : ?
YOUR ANSWER : ?

Activated sludge undergoes

Tertiary treatment

Secondary treatment

any of these

Primary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

Loss of carbon through the microbial loop in oligotrophic environments is __________ to/than the loss of carbon through the microbial loop in copiotrophic environments.

lesser

half

greater

approximately equal

TRUE ANSWER : ?
YOUR ANSWER : ?

Trickling filter comes under

tertiary treatment

primary treatment

none of these

secondary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

Removal of solids is generally considered as a

Tertiary treatment

Secondary treatment

None of these

Primary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

Coliforms are used as indicator organisms because

both (a) and (b)

a testing procedure with great specificity is easy to perform

None of these

they are present wherever enteric pathogens are present

TRUE ANSWER : ?
YOUR ANSWER : ?

The rate of flux of oxygen in air is __________ to/than the rate of flux of oxygen in water.

approximately equal

lesser

greater

half

TRUE ANSWER : ?
YOUR ANSWER : ?

Hyphomycete fungi

None of these

produce nonmotile tetaradiate conidia

both (a) and (b)

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

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

half

greater

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

most probable number

MUG

TRUE ANSWER : ?
YOUR ANSWER : ?