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CD0069. Basic Refrigeration Theory

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About this collection

The Seagull CBT bank is organised into modules covering safety, shipboard operations, maintenance and other topics. Original module names and codes are retained to help you find the topic you need.

“Seagull CBT — CD0069. Basic Refrigeration Theory” contains 22 questions across 1 collection.

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Sample questions and answers

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The operation of the thermostatic expansion valve is based on?

One correct answer

  • Constant degree of superheat in the vapour at the evaporator.✓ Correct answer
  • Constant flow of refrigeration medium.
  • Constant evaporator pressure.
  • Constant temperature in the condenser.
Which of the following does the term latent heat describe when referring to a refrigerant?

One correct answer

  • The temperature.
  • Heat required to cause evaporation at constant boiling temperature and pressure.✓ Correct answer
  • The heat required to superheat the refrigerant gas.
  • The heat required to raise the liquid temperature to boiling point.
0 Kelvin is equal to .....?

One correct answer

  • 0 Fahrenheit
  • 0 ˚Celsius
  • –273,16 ˚Celsius✓ Correct answer
  • + 273,16 ˚Celsius
What is absolute pressure?

One correct answer

  • It is the same as 100% vacuum.
  • Atmospheric pressure plus gauge pressure.✓ Correct answer
  • It is equal to atmospheric pressure.
  • It is the same as gauge pressure.
What will be an adequate allowance for oil circulation in a refrigeration system?

One correct answer

  • One litre of oil for every thirty kilo of refrigerant charge.
  • One litre of oil for every twenty kilo of refrigerant charge.✓ Correct answer
  • One litre of oil for every kilo of refrigerant charge.
  • One litre of oil for every two kilo of refrigerant charge.

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