Explain the terms: steel tubing, normal size copper tubing
[5 marks]List down advantages of copper tube on other tube.
[5 marks]Discuss properties of lubricating oil used in refrigeration system.
[5 marks]List down the types of expansion devices.
[5 marks]Write a short note on Thermal Expansion device.
[5 marks]Explain in detail Valve body materials.
[5 marks]Write Short note on cooling tower materials.
[5 marks]Differentiate Soft copper tubing and hard-drawn copper tubing.
[5 marks]Write the selection procedure for refrigerant lubricant.
[5 marks]Explain the need of lubrication in refrigeration system.
[5 marks]Enlist the types of lubricants which are used in refrigeration system.
[5 marks]Write compatibility of lubricant with refrigerant fluid.
[5 marks]Write Short note on solvent and cleaning.
[5 marks]Explain the terms: Cutting tubing, bonding tubing, connecting tubing, flaring tubing.
[5 marks]Explain the effect of refrigerant on lubricant density.
[5 marks]List down different type of joining process used to join copper tubes and explain any one in detail.
[5 marks]Explain pipeline materials in brief.
[5 marks]