Question 1

Mechanical draft towers use fans to force air in (_______draft) or pull air out (_________draft.)

Accepted Answer

A)  forced draft and induced draft 
B)  induced draft and forced draft 
C)  cross and counterflow 
D)  counterflow and cross 
A)  forced draft and induced draft 
B)  induced draft and forced draft 
C)  cross and counterflow 
D)  counterflow and cross

Question 2

Results when electrochemical reactions occur between metal surfaces and surrounding hot water that results in the gradual wearing away of metal.

Accepted Answer

A)  corrosion 
B)  plugging 
C)  fouling 
D)  scale 
A)  corrosion 
B)  plugging 
C)  fouling 
D)  scale

Question 3

The measure of how much water the air has absorbed at a given temperature.

Accepted Answer

A)  humidity 
B)  wet bulb 
C)  relative humidity 
D)  dry bulb 
A)  humidity 
B)  wet bulb 
C)  relative humidity 
D)  dry bulb

Question 4

Identify the following components.

Accepted Answer

1) Forced draft, counter-flow 
2) Drift

Question 5

The objective of water treatment is to reduce or minimize all of the following except:

Accepted Answer

A)  Scale formation- suspended solids form deposits 
B)  Corrosion- electrochemical reactions with metal surfaces 
C)  Fouling- silt, debris, algae plug exchanger tubes 
D)  Wood decay- fungi 
E)  pH increase or decrease
F) water deionization 
A)  Scale formation- suspended solids form deposits 
B)  Corrosion- electrochemical reactions with metal surfaces 
C)  Fouling- silt, debris, algae plug exchanger tubes 
D)  Wood decay- fungi 
E)  pH increase or decrease
F) water deionization

Question 6

Devices used in a cooling tower to keep water from blowing out.

Accepted Answer

A)  louvers 
B)  drift eliminators 
C)  columns 
D)  splash bars 
A)  louvers 
B)  drift eliminators 
C)  columns 
D)  splash bars

Question 7

The wet bulb temperature is the:

Accepted Answer

A)  the air temperature as measured by a bulb thermometer covered by a water saturated wick. Takes into account the relative humidity. 
B)  combination of dry and wet-bulb temperature 
C)  air temperature as measured by a dry-bulb thermometer 
D)  wet-bulb temperature minus the relative humidity 
A)  the air temperature as measured by a bulb thermometer covered by a water saturated wick. Takes into account the relative humidity. 
B)  combination of dry and wet-bulb temperature 
C)  air temperature as measured by a dry-bulb thermometer 
D)  wet-bulb temperature minus the relative humidity

Question 8

The approach to tower is the:

Accepted Answer

A)  Relative humidity minus the dry bulb 
B)  Wet-bulb minus the dry-bulb 
C)  temperature delta ∆ that exists between the relative humidity and the wet-bulb temperature of the air leaving the tower. 
D)  temperature delta ∆ that exists between the water leaving the tower and the wet bulb temperature of the air entering the tower. 
A)  Relative humidity minus the dry bulb 
B)  Wet-bulb minus the dry-bulb 
C)  temperature delta ∆ that exists between the relative humidity and the wet-bulb temperature of the air leaving the tower. 
D)  temperature delta ∆ that exists between the water leaving the tower and the wet bulb temperature of the air entering the tower.

Question 9

A device used in a cooling tower to break up and redirect the flow of falling water.

Accepted Answer

A)  louvers 
B)  drift eliminators 
C)  columns 
D)  splash bars 
A)  louvers 
B)  drift eliminators 
C)  columns 
D)  splash bars

Question 10

Draw a simple hyperbolic cooling tower. Identify basic components.

Accepted Answer

A hyperbolic cooling tower is a large, c

Question 11

Air moves through a (forced draft or induced draft) at a higher rate. What happens to the flow rate at the discharge point?

Accepted Answer

A)  forced, speeds-up, 10% efficiency increase 
B)  forced, slows-down, 20% efficiency decrease 
C)  induced, speeds-up, 10% efficiency increase 
D)  induced, slows-down, 20% efficiency decrease 
A)  forced, speeds-up, 10% efficiency increase 
B)  forced, slows-down, 20% efficiency decrease 
C)  induced, speeds-up, 10% efficiency increase 
D)  induced, slows-down, 20% efficiency decrease

Question 12

Evaporative cooling accounts for ___________ to __________ of the cooling effect in a tower.

Accepted Answer

A)  10% to 20% 
B)  40% to 70% 
C)  80% to 90% 
D)  90% to 100% 
A)  10% to 20% 
B)  40% to 70% 
C)  80% to 90% 
D)  90% to 100%

Question 13

A common term used to describe the internal buildup on the surface area of a heat exchanger that results in restricted flow .

Accepted Answer

A)  corrosion 
B)  plugging 
C)  fouling 
D)  scale 
A)  corrosion 
B)  plugging 
C)  fouling 
D)  scale

Question 14

A post used to support the framework of a cooling tower.

Accepted Answer

A)  treated wood column 
B)  white pine column 
C)  plastic column 
D)  a & c 
A)  treated wood column 
B)  white pine column 
C)  plastic column 
D)  a & c

Question 15

_______________ is a term applied to the horizontal direction that air takes in relationship to the downward flow of water in a cooling tower. _______________ is a term applied to the vertical flow of air as it moves through a cooling tower in relationship to the downward flow of water.

Accepted Answer

A)  induced and forced 
B)  horizontal and counterflow 
C)  cross and vertical 
D)  cross and counterflow 
A)  induced and forced 
B)  horizontal and counterflow 
C)  cross and vertical 
D)  cross and counterflow

Question 16

Sensible heat transfer accounts for __________ to ___________ of the cooling effect in a cooling tower.

Accepted Answer

A)  10% to 20% 
B)  40% to 70% 
C)  80% to 90% 
D)  90% to 100% 
A)  10% to 20% 
B)  40% to 70% 
C)  80% to 90% 
D)  90% to 100%

Question 17

Dry bulb temperature is the:

Accepted Answer

A)  the air temperature as measured by a bulb thermometer covered by a water saturated wick. Takes into account the relative humidity. 
B)  combination of dry and wet-bulb temperature 
C)  air temperature as measured by a dry-bulb thermometer 
D)  wet-bulb temperature minus the relative humidity 
A)  the air temperature as measured by a bulb thermometer covered by a water saturated wick. Takes into account the relative humidity. 
B)  combination of dry and wet-bulb temperature 
C)  air temperature as measured by a dry-bulb thermometer 
D)  wet-bulb temperature minus the relative humidity

Question 18

A pipe that evenly disperses hot water over the fill of a cooling tower.

Accepted Answer

A)  water distribution header 
B)  tower water discharge line 
C)  hot water inlet to cooling tower 
D)  a & c 
A)  water distribution header 
B)  tower water discharge line 
C)  hot water inlet to cooling tower 
D)  a & c

Question 19

Draw a simple flow diagram of a cooling tower, centrifugal pump, valves, and two heat exchangers in parallel service.

Accepted Answer

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Mechanical draft towers use fans to force air in (_draft) or pull air out (___draft.)

Results when electrochemical reactions occur between metal surfaces and surrounding hot water that results in the gradual wearing away of metal.

The measure of how much water the air has absorbed at a given temperature.

Identify the following components.

The objective of water treatment is to reduce or minimize all of the following except:

Devices used in a cooling tower to keep water from blowing out.

The wet bulb temperature is the:

The approach to tower is the:

A device used in a cooling tower to break up and redirect the flow of falling water.

Draw a simple hyperbolic cooling tower. Identify basic components.

Air moves through a (forced draft or induced draft) at a higher rate. What happens to the flow rate at the discharge point?

Evaporative cooling accounts for _ to of the cooling effect in a tower.

A common term used to describe the internal buildup on the surface area of a heat exchanger that results in restricted flow .

A post used to support the framework of a cooling tower.

_ is a term applied to the horizontal direction that air takes in relationship to the downward flow of water in a cooling tower. _ is a term applied to the vertical flow of air as it moves through a cooling tower in relationship to the downward flow of water.

Sensible heat transfer accounts for to _ of the cooling effect in a cooling tower.

Dry bulb temperature is the:

A pipe that evenly disperses hot water over the fill of a cooling tower.

Draw a simple flow diagram of a cooling tower, centrifugal pump, valves, and two heat exchangers in parallel service.

Introduction to Process Equipment

Valves

Piping and Vessels

Pumps

Compressors

Turbines and Motors

Heat Exchangers

Steam Generation- Boilers

Fired Heaters Furnaces

Instruments

Process Diagrams

Utility Systems

Reaction Systems

Distillation Systems

Extraction and Other Separation Systems

Plastics Systems

Filters

Exam 8: Cooling Towers

Mechanical draft towers use fans to force air in (_______draft) or pull air out (_________draft.)

Results when electrochemical reactions occur between metal surfaces and surrounding hot water that results in the gradual wearing away of metal.

The measure of how much water the air has absorbed at a given temperature.

Identify the following components.

The objective of water treatment is to reduce or minimize all of the following except:

Devices used in a cooling tower to keep water from blowing out.

The wet bulb temperature is the:

The approach to tower is the:

A device used in a cooling tower to break up and redirect the flow of falling water.

Draw a simple hyperbolic cooling tower. Identify basic components.

Air moves through a (forced draft or induced draft) at a higher rate. What happens to the flow rate at the discharge point?

Evaporative cooling accounts for ___________ to __________ of the cooling effect in a tower.

A common term used to describe the internal buildup on the surface area of a heat exchanger that results in restricted flow .

A post used to support the framework of a cooling tower.

_______________ is a term applied to the horizontal direction that air takes in relationship to the downward flow of water in a cooling tower. _______________ is a term applied to the vertical flow of air as it moves through a cooling tower in relationship to the downward flow of water.

Sensible heat transfer accounts for __________ to ___________ of the cooling effect in a cooling tower.

Dry bulb temperature is the:

A pipe that evenly disperses hot water over the fill of a cooling tower.

Draw a simple flow diagram of a cooling tower, centrifugal pump, valves, and two heat exchangers in parallel service.

Introduction to Process Equipment

Valves

Piping and Vessels

Pumps

Compressors

Turbines and Motors

Heat Exchangers

Steam Generation- Boilers

Fired Heaters Furnaces

Instruments

Process Diagrams

Utility Systems

Reaction Systems

Distillation Systems

Extraction and Other Separation Systems

Plastics Systems

Filters

Mechanical draft towers use fans to force air in (_draft) or pull air out (___draft.)

Evaporative cooling accounts for _ to of the cooling effect in a tower.

_ is a term applied to the horizontal direction that air takes in relationship to the downward flow of water in a cooling tower. _ is a term applied to the vertical flow of air as it moves through a cooling tower in relationship to the downward flow of water.

Sensible heat transfer accounts for to _ of the cooling effect in a cooling tower.