26. which of the following descriptions about plastic pollution is incorrect? A.

Question

26. which of the following descriptions about plastic pollution is incorrect? A. Plastic pollutants are always degradable and will not cause environmental impacts in the long term B. Can clog storm drains causing roadways to flood C. Plastic pollutants increase traffic and accidents due to decreased visibility and traffic control D. Plastic pollution is resulted from the use of non-degradable plastic or polymer materials 27. For a spiral membrane filtration system, the membrane was fabricated by adding additional shims to the flow channel to increase the depth of the channel by 30% (flow rate remains unchanged). What impacts will be made to cross flow velocity? A. increase by about 23% B. increase by about 13% C. decrease by about 23% D. decrease by about 13% 28. What factors are invovled in membrane fouling? A. particle clogging on membrane pores B. Organic matter penetration into membraen pores C. cake layer formation on membrane surface D. all of above.

Explanation / Answer

26. which of the following description about plastic pollution s incorrect?

ans . we used plastic in many ways for storage water, carrying goods, toys etc which makes by non degradable plastic or polymer materials. and they choke the outlets during the storm or heavy run which cause the flood in roadways. and its tiny particles are goes into environment and become the cause of decrease invisibility.

so here its a first option which is incorrect.

A) plastic pollution are always degradable and will not cause environmental impacts in the long term.

27. for a spiral membrane filtration system , the membrane was fabricated by adding additional shims to the flow channel to increase the depth of the channel by 30% ( flow rate remains unchanged). what impacts will be made to cross flow velocity?

ans. we dont know the actual figure then

let actual module feed water flow = 260 at the module feed side surface area of 100

then cross flow velocity is = 260/100 = 2.6

if surface area increased by 30% then cross flow velocity is = 260 / 130 = 2

it decreased = 2.6 - 2 = 0.6

decreased in percentage = 0.6 / 2.6 * 100 = 23.07 %

so the right option is (C)

28. what factors are involved in membrane fouling?

ans. these all factors are involved in membrane fouling then the right option is (D) all of the above

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