435

Question 1

the capacity of a condenser is affected by the

Answer 1

area of contact with the cooling medium

Question 2

natural draft air cooled condensers and forced air condensers are alike in the both types

Answer 2

depend on air circulating over the coils

Question 3

low ambient control in air cooled condenser can be achieved by

Answer 3

closing the dampers

Question 4

spring loaded relief valves protect a system against explosion by acting in response to high ___. Fusible plugs act in response to high ___

Answer 4

pressure; temperature

Question 5

periodic maintenance of air cooled condensers includes doing which of the following every three months

Answer 5

checking all belts and pulleys

Question 6

in the __ system water passes through the condenser to cool the refrigerant the water is then ___

Answer 6

wastewater; discharged to the sewer

Question 7

in a water cooled condenser system makeup water is used for

Answer 7

replacing water lost through evaporation

Question 8

tube in tube shell and coil and shell and tube condenses are alike in the following ways

Answer 8

liquid refrigerant collects at the bottom

Question 9

a condenser has a pressure relief device that ___ if the refrigerant pressure becomes too high

Answer 9

releases refrigerant

Question 10

generally how long should you allow a chemical cleaner to stand in a condenser

Answer 10

a few hours

Question 11

which of the following can increase the capacity of a cooling lower or a spray pond by the greatest amount

Answer 11

increase in air velocity across the surface

Question 12

what type of cooling tower is shown in the drawing below

Answer 12

induced draft, counterflow

Question 13

which components in the water circulating system for a cooling tower or spray pond are used to keep the concentration of minerals low

Answer 13

bleedoff valve

Question 14

the capacity of a cooling tower can be controlled by means of a

Answer 14

diverting valve

Question 15

as part of maintaining a cooling tower you should check the ____ everyday

Answer 15

float valve for clogging

Question 16

the basic classifications for evaporative condensers are

Answer 16

blow through and draw through

Question 17

an evaporative condenser may include a desuperheating coil for the purpose of

Answer 17

reducing the formation of scale

Question 18

which of the following methods will maintain condensing pressure during cold weather operation

Answer 18

circulating water intermittently

Question 19

what will prevent the water in an evaporative condenser from freezing during cold weather

Answer 19

installing a sump heater

Question 20

as a part of maintaining an evaporative condenser you should check the ___ every three months

Answer 20

fan blades for tightness

Question 21

one of the main categories of water related problems in an air conditioning or refrigeration system is

Answer 21

corrosion

Question 22

corrosion in a water cooled system can be cause by

Answer 22

biological organisms

Question 23

scale formation can be reduced in a refrigeration system by adding ___ to the cooling water

Answer 23

acid

Question 24

bacteria and algae can be controlled in a refrigeration system by adding ___ to the cooling water

Answer 24

chlorine

Question 25

chemical deterioration in a wooden cooling tower can be controlled by

Answer 25

keeping the pH of circulating water in the 6.0 to 7.5 range