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Quick Chiller Tech Knowledge Assessment
These are fast multiple choice questions to gauge your Chiller knowledge of critical principles.
10
Questions
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1
What defines a Chiller?
The compressor used
The medium processed
The refrigerant used
The size of the machine
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2
What is Chiller Approach?
Troubleshooting Procedure
Not a real thing
Chiller Load Value
Efficiency of exchange value
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3
How many ways do Screw compressors control compressor load?
1
2
3
4
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4
Why is DP critical for Screw compressors?
Oil Flow
Refrigerant Temp
Leaving Water Temp
Migration
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5
What setpoint can you change to stop compressor surge?
Current Limit
Oil DP
Water DP
Metering Valve Position
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6
What is a Low Pressure Chiller?
Special design for low setpoint applications
Special design to operate at high altitudes
Chiller that operate close to 0 psig but slightly above
Chiller that operate below 0 psig
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7
What value does Cooling Tower Approach use with leaving water temp to calculate value?
Water temp leaving chiller
Ambient wet-bulb
Tower entering water temp
Chiller entering water temp
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8
Other than superheat, what other value can be used to control metering device position?
Liquid level
Compressor amps
Leaving water temp
Compressor speed
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9
What is the bus between the rectifiers and inverters called in a VFD?
Transfer bus
Link bus
Transcritical bus
DC bus
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10
What type of multi meter is needed for VFD work?
Clamp meter
True RMS
Megger
Bench meter
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