9-10

Question 1

Layers of corrugated plastic or metal inside the fill that helps to keep water from being blown out of the cooling tower

Answer 1

drift eliminators

Question 2

a type of cooling tower where fans located on the sides at the bottom of the tower are used to force air up through the tower

Answer 2

forced draft

Question 3

an operational issue where various kinds of deposits with a water distribution system build up, can be biological or deposition

Answer 3

fouling

Question 4

type of cooling where fans, located at the top of the tower, remove hot air which creates a low pressure pocket in the tower causing cooler air to be drawn in from the bottom

Answer 4

induced draft

Question 5

method of fouling control where chemicals are added to prevent chemical reactions or biological demand that might cause deposits to build up, bleach is a common biocide that prevents and controls biological growth

Answer 5

inhibtors

Question 6

testing performed on water samples to ensure correct levels of chemical injection, common water test include pH, calcium hardness, phosphate, free chlorine, and corrosion coupons.

Answer 6

water analysis

Question 7

Components which adjust the amount of direction of airflow into the cooling tower, located at the outer sides of the cooling tower and typically spend the whole length

Answer 7

louvers

Question 8

the temperature where vapors condense to liquid

Answer 8

dew point

Question 9

a method of fouling control where dispersants, such as polymers, are added to prevent the formulation of deposits

Answer 9

antifoulants

Question 10

an operations issue where a metal is deteriorated or damaged, caused by oxygen and other dissolved gases entrained in the water, controlled by pH controls or corrosion inhibitors.

Answer 10

corrosion

Question 11

a method of corrosion control where chemicals are added to act as a passivation film (protective layer) on metal parts to minimize localized corrosion, typically done with phosphate.

Answer 11

corrosion inhibitors

Question 12

a type of fouling where impurities from the water are deposited on heat transfer surfaces, commonly referred to as scaling

Answer 12

deposition

Question 13

relies on conduction and convection to transfer heat through boundaries from one process fluid to another

Answer 13

heat exchangers

Question 14

allows the transfer of heat from a hot process fluid to a cooler fluid without direct physical contact

Answer 14

heat exchangers

Question 15

• flow is ideal in heat exchangers because it provides more mixing and better heat transfer

Answer 15

turbulent flow

Question 16

this type of exchangers are typically used for high pressure or temperature because they are very rugged due to construction and shape

Answer 16

shell & tube

Question 17

this type of exchangers are typically when only a small amount of heat needs to be transferred between streams and is through true counter-flow

Answer 17

double pipe

Question 18

provide the heat necessary to separate final products from by-products in a distillation column.

Answer 18

reboilers

Question 19

when putting an exchanger in service, always line up the _____ side first to avoid thermal shock or vapor locking

Answer 19

cool side

Question 20

occurs when the tube side stream and shell side stream flow in opposite directions, but parallel to each other

Answer 20

couter-current flow

Question 21

occurs when the tube side and the shell side streams flow perpendicular to each other, the shell side stream flows across the two bundles that are baffled.

Answer 21

cross-flow