When sewage water is used for drinking purposes they cause …………..
a) typhoid
b) cholera
c) hepatits
d) all of these
BOD and COD are water quality tests, which determine the ………… of water.
a) quality
b) quantity
c) density
d) volume
BOD stands for…………..
a) biological oxygen demand
b) biological organic demand
c) balance oxygen demand
d) broad oxygen demand
COD stands for ……….
a) chemical oxygen demand
b) collect oxygen demand
c) continues oxygen demand
d) none of these
………is also known as biological oxygen demand.
a) COD
b) BOD
c) ATP
d) ADP
BOD is a procedure that measure the …………. Consumed by micro organisms during the decomposition of organic matters.
a) dissolve carbon
b) dissolve hydrogen
c) dissolve oxygen
d) dissolve nitrogen
