Centrifugal Chiller Components and Functions Questions

Question 1

Select the component where you would be able to obtain suction pressure on chiller 1.

Answer 1

Chiller 1 control panel evaporator button

Question 2

Select the button where you would be able to obtain proper temperature and pressure to calculate for the subcooling temperature for chiller 2.

Answer 2

Chiller 2 control panel condenser button

Question 3

On chiller 1 how many passes does the condenser have?

Answer 3

2

Question 4

Select the component where you would be able to obtain RPM’s on chiller 1 steam turbine.

Answer 4

Chiller 1 control panel steam button

Question 5

Choose from the toolbar which hose is used to recover low side refrigerant on chiller 1.

Answer 5

Refrigerant hose (liquid)

Question 6

Find the component used to start chiller 2.

Answer 6

Chiller 2 control panel ON button

Question 7

Select the component on the open loop water line that is monitoring GPM’s.

Answer 7

chiller 1 condenser water return line flow switch

(Flow switch monitors GPMs)

Question 8

On the open loop water system that supplies chiller 2, select the line that causes the refrigerant to condense.

Answer 8

Chiller 2 condenser water supply line

Question 9

Go to the navigation bar on the left and select chiller 1. Go to the back view and from left to right select the condensate valves on primary condensate tank that would need to be opened up during steam turbine warm up for chiller 1.

Answer 9

Chiller 1 condensate 1/4 turn valve 1, Chiller 1 condensate 1/4 turn valve 2, Chiller 1 condensate 1/4 turn valve 3

Question 10

Select the button where you would be able to obtain the proper temperature and pressure to calculate for superheat in the suction line for chiller 2.

Answer 10

Chiller 2 control panel evaporator button

Question 11

You suspect that Chiller 1 is low on refrigerant and is operating under full load conditions and the suction pressure is 35 psig is this normal?

Answer 11

Yes

Question 12

What 2 components from right to left have to be normally open so the condensate can be properly removed automatically from the steam line during full load operating conditions.

Answer 12

Chiller 2 drip leg condensate line steam side 1/4 turn valve, Chiller 2 drip leg condensate line condensate side 1/4 turn valve

(Left to right from left side pov)

Question 13

On the back view identify and select the component that will visually display the level of the main condensate tank.

Answer 13

Chiller 2 high temperature condensate tank sight glass

Question 14

When the main steam valve on chiller 1 is closed and the chiller is not running, what component would you select to open to drain out the condensate from the main vertical steam line during turbine warm up period.

Answer 14

Chiller 1 condensate 1/4 turn valve 1

Question 15

Go to the navigation bar on the left and select chiller 1. Find the component used to stop chiller 1.

Answer 15

Chiller 1 control panel OFF button

NOT knife switch

Question 16

Identify and locate the steam bypass valve for the turbine that needs to be opened up to warm up the steam turbine blades, bearings and shaft in chiller 1.

Answer 16

Chiller 1 steam turbine bypass line 1/4 turn valve

Question 17

You suspect that Chiller 2 is low on refrigerant and operating under full load conditions and the suction pressure is 30 psig is this normal?

Answer 17

No

Question 18

On the control panel find the button that gives you discharge pressure and refrigerant liquid line temperature in Chiller 1.

Answer 18

Chiller 1 control panel condenser button

Question 19

Identify and select the component that you would open without opening the main steam valve to warm up the gland seals on the turbine.

Answer 19

Chiller 1 gland seal steam by-pass line 1/4 turn valve

Question 20

What component will shut down vacuum pump 1 due to water loss.

Answer 20

Chiller 2 vacuum pump 1 flow switch

Question 21

Chiller 1 went off line, condenser water pump 1 suddenly went offline. Find the component which caused the chiller to stop running.

Answer 21

Chiller 1 condenser water return line flow switch

Question 22

Identify the component that regulates flow through the compressor.

Answer 22

Chiller 1 variable inlet vane controller

Question 23

Go to the back view and identify 2 components from the lowest to the highest where it would directly display pressures and you would be able to obtain delta P across the entire chiller for chiller 1.

Answer 23

Chiller 1 condenser water supply line pressure gauge, Chiller 1 surface condenser, condenser water return pressure gauge

Question 24

Select the component that will directly display the surface condenser pressure on chiller 2.

Answer 24

Chiller 2 steam exhaust pressure gauge

Question 25

On chiller 2 identify the secondary refrigerant line that will cause the refrigerant to turn into a vapor in the evaporator while chiller 2 is on line.

Answer 25

Chiller 2 chill water return line

Question 26

What component controls capacity on the refrigerant side of the chiller

Answer 26

variable inlet vane controller

Question 27

Identify the component where you can see the bearing chamber on the compressor.

Answer 27

compressor sight glass

Question 28

Go to the right side of the turbine. You are preparing this steam turbine to put it on line. Select the components used and put them in the proper positions from left to right that will enable the high pressure condensate to drain out while the turbine is fully online.

Answer 28

Chiller 2 drip leg condensate line condensate side 1/4 turn valve, OPEN, Chiller 2 drip leg condensate line steam side 1/4 turn valve, NO ACTION NEEDED

Question 29

Select and identify the component that an engineer can use if he had to shut down the steam turbine in an emergency.

Answer 29

Overspeed trip Handle

Question 30

Before starting this compressor check to see if it is ready to run. Select the component and ensure it is in the proper position for start up and normal operation.

Answer 30

discharge line valve, open

Question 31

If the water level drops in the hot well what valve closes so that the condensate level can increase and the surface condenser would not empty out?

Answer 31

overboard valve

Question 32

Find and select the component that opens up automatically and protect the turbine in case of an overspeed trip. This component will also assist in stopping the turbine blades more quickly on chiller 2.

Answer 32

Chiller 2 vacuum breaker

Question 33

What temperature should the bearing be at the seal side and what temp should the bearing be at the thrust side during normal full load conditions.

Answer 33

Seal side: 160 F Thrust side: 170 F

Question 34

On chiller 1, before the atmospheric valve releases pressure, what component releases a small amount of steam exhaust and makes a small sound before the system over pressurized?

Answer 34

Chiller 1 sentinel valve

Question 35

If this turbine was on line during normal operating full load conditions, where does the condensate collect so it can be automatically removed and drained as the turbine operates during your shift. The purpose of this area at the bottom of the line is to prevent water hammering on the main steam line that feeds the Governor valve.

Answer 35

Chiller 2 main steam line drip leg

Question 36

As both condensate pumps operate during normal conditions, identify and select the component which opens up when the hotwell condensate level starts to drop low.

Answer 36

Chiller 1 recirculating valve

Question 37

Find and select the component where you can adjust and control the oil temperature for the compressor of chiller 1.

Answer 37

Chiller 1 compressor oil cooler oil mixing valve

Question 38

Select the city water feed line valve for the primary steam condenser and put it in the proper position for normal operation.

Answer 38

Chiller 2 city water make up water line 1/4 turn valve, open

Question 39

Select chiller 1, identify the component you need to have open during turbine warm up so condensate can drain out to avoid water hammering in the governor valve before turbine start up.

Answer 39

Chiller 1 condensate 1/4 turn valve 3 (The one to the governor valve)

Question 40

What is an acceptable temperature for the turbine thrust bearings after running continuously for several days?

Answer 40

170 F

Question 41

What component is used to remove the moisture from the compressed air on the pneumatic system for chiller 1

Answer 41

Chiller 1 air compressor tank 1/4 turn drain valve

Question 42

You as the operating engineer see that the steam pressure to the seal end seal is at 2 psi. what component is causing this.

Answer 42

Gland seal pressure reducing valve

Question 43

What position is evaporator vapor charging valve during normal operation?

Answer 43

Frontseated

Question 44

You are preparing the surface condenser to put it on line. Select the component used to fill the surface condenser at a proper level before start up. Select the component which will be used when initially filling the surface condenser, select the first action needed to accomplish this task

Answer 44

Chiller 2 hot well make up water 1/4 turn valve, no action needed

Question 45

Select the city water feed line valve for the primary steam condenser and put it in the proper position for normal operation.

Answer 45

Chiller 2 city water make up water line 1/4 turn valve, open NOT THE Chiller 2 hot well make up water 1/4 turn valve, closed

Question 46

Identify and select the oil line that feeds oil to the gravity tank and compressor bearings while the chiller is in operation.

Answer 46

Chiller 1 bearing oil feed line

Question 47

Go to the back view of chiller 1 and select the lines which enables both vacuum pumps to pull out the air and create a vacuum in the primary steam condenser.

Answer 47

Chiller 1 vacuum pump suction lines NOT THE Chiller 1 city water make up line

Question 48

Select the gland seal steam bypass valve and put it in the correct position for normal operation.

Answer 48

Chiller 2 gland seal steam by-pass line 1/4 turn valve, open

Question 49

On chiller 1 what component would you use that will stop the turbine if the overspeed trip failed?

Answer 49

Chiller 1 manual steam valve

Question 50

Go to the back view and select from left to right the 3 components which needs air to operate.

Answer 50

Chiller 1 overboard valve, Chiller 1 recirculating valve, Chiller 1 air actuator control box (Questions will only ask for left to right or front to back only if the components are on the same axis, so the governor valve is not here)

Question 51

Identify the component where the steam is at its highest pressure and temperature.

Answer 51

high pressure steam line

Question 52

Identify the component that would protect the operator if he is working on the steam turbine in the vicinity of the vacuum breaker while the chiller 2 is on line.

Answer 52

Chiller 2 shaft coupling guard

Question 53

Select the component which will shut down the turbine if the RPM's reach 4900

Answer 53

Overspeed trip Handle

Question 54

Identify and select the component on chiller 1 where you would point the laaser tachometer at to obtain RPM's?

Answer 54

Chiller 1 shaft coupling

Question 55

You are preparing the surface condenser to put it on line. Select the component on the atmospheric valve that you would use to set this valve in the correct position and ensure it is ready for normal operation.

Answer 55

Chiller 2 atmospheric valve handle, fully clockwise (If it says ensure, then it wants you to add the position in your answer)

Question 56

Go to the right side of the turbine. You are preparing this steam turbine to put it on line. Select the components used and put them in the proper positions from left to right that will enable the high pressure condensate to drain out while the turbine is fully online.

Answer 56

Chiller 2 drip leg condensate line condensate side 1/4 turn valve, open, Chiller 2 drip leg condensate line steam side 1/4 turn valve, no action needed

Question 57

Regardless of the position of the Gimble valve on chiller 2 identify and select the component where the steam would be at its highest pressure and temperature.

Answer 57

Chiller 2 high pressure steam line

Question 58

Select chiller 2 and identify the component which aids in the operation and enables the valves to modulate and open and close on the pneumatic valves of chiller 2

Answer 58

Chiller 2 air compressor system

Question 59

Before starting this compressor check to see if it is ready to run. Select the component and ensure it is in the proper position for start up and normal operation.

Answer 59

Chiller 2 discharge line valve, open (said ensure)

Question 60

Select the component where you would be able to obtain head pressure on chiller 1.

Answer 60

control panel condenser button

Question 61

Go to the back view and identify 2 components from the lowest to the highest where it would send a signal to the control panel the so you can obtain condenser water delta T across the entire chiller of chiller 1.

Answer 61

Chiller 1 condenser water supply line temperature transducer, Chiller 1 surface condenser, condenser water return temperature transducer (Temperature transducers NOT thermometers)

Question 62

Identify the component that will control the speed of the turbine

Answer 62

governor valve