Refrigeration Plant Cooling Load and System Capacity Quiz
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Questions and Answers

What must the refrigeration plant's load always equal?

  • The compressor capacity
  • The temperature of the refrigerated medium
  • The cooling load (correct)
  • The mass of refrigerant circulated per unit time

What will happen if the plant operates at full capacity when the load is low?

  • The compressor capacity will tie up party
  • The system capacity control will influence the amount of refrigerant
  • The temperature of the refrigerated medium will rise above the set point (correct)
  • The mass of refrigerant circulated per unit time will drop

What is used to directly adjust the compressor capacity?

  • A control system that can directly adjust compressor capacity (correct)
  • A thermostat with a bimetal or filled system thermal sensing element
  • A control system that regulates evaporator capacity
  • A control system that responds to temperature, pressure, and humidity

How can compressor capacity be adjusted?

<p>By cycling the compressor on and off (two-position control) (C)</p> Signup and view all the answers

What is used to detect the temperature of the refrigerated medium?

<p>A thermostat with a bimetal or filled system thermal sensing element (D)</p> Signup and view all the answers

How can the system capacity control influence the amount of refrigerant?

<p>By responding to changes in evaporator capacity, which means the compressor is controlled indirectly (A)</p> Signup and view all the answers

What is the primary function of a thermostat in a refrigeration system?

<p>To start or stop the compressor based on temperature deviations (C)</p> Signup and view all the answers

What type of thermostat can directly control the power supply to small compressor motors?

<p>Bimetal thermostat (C)</p> Signup and view all the answers

How does a filled system remote bulb thermometer control a compressor?

<p>By actuating a magnetic motor starter (contactor) to start or stop the compressor (B)</p> Signup and view all the answers

What is the purpose of the temperature differential setting in a thermostat?

<p>To prevent the compressor from short-cycling (C)</p> Signup and view all the answers

What is the relationship between the cut-in and cut-out points of a thermostat?

<p>The cut-in point is always at a higher temperature than the cut-out point (A)</p> Signup and view all the answers

Which type of thermostat can be used to produce variable resistance, variable voltage, or variable current, or send digital signals to control systems?

<p>Thermostats with electrical resistance elements or electronic temperature sensors (D)</p> Signup and view all the answers

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