Refrigeration and air conditioning-Interview short Questions

Refrigeration and air conditioning-Interview short Questions

Short questions increases the understanding and clarity to a greater depth.

It enables to apply the fundamentals in real life.

Psychrometry

    • Define Psychrometry.
    • What are psychrometric properties? List these properties.
    • What is a dry bulb temperature?
    • What is a wet bulb temperature?
    • What is a wet bulb depression?
    • What is a dew point temperature?
    • What is a dew point depression?
    • What is a enthalpy of a moist air?
    • What is absolute humidity?
    • What is a relative humidity?

    Cooling Load Calculations

    What is a grand sensible heat factor?

  • What is an apparatus dew point?
  • What is an effective room sensible heat factor?
  • What is a sensible heat load?
  • What is a latent heat load?
  • What is effective temperature?
  • Refrigeration
  • What is meant by multi-evaporator refrigeration? Where does it used in actual life?
  • What is refrigerant lubricant oil miscibility? Is this miscibility desirable or not and why?
  • What is a low pressure cut-out? Where does it installed in the refrigeration circuit and why?
  • What is a high pressure cut-out? Where does it installed in the refrigeration circuit and why?
  • What is a thermostat? Where does it installed in the refrigeration circuit and why?
  • What is an overload protector? Where does it installed in the refrigeration circuit and why?
  • What is a solenoid valve? Where does it installed in the refrigeration circuit and why?
  • What is a liquid suction heat exchanger? Where does it installed in the refrigeration circuit and why?
  • What is a receiver in a refrigeration circuit? Where does it installed in the refrigeration circuit and why?
  • What is a drier cum filter? Where does it installed in the refrigeration circuit and why?
  • What is a capillary tube? Where does it installed in the refrigeration circuit and why?
  • What is a thermostatic expansion valve? Where does it installed in the refrigeration circuit and why?
  • What is a dry evaporator?
  • What is flooded evaporator?
  • What is an accumulator? Where does it installed in the refrigeration circuit and why?
  • What is an air cooled condenser? when does it used?
  • What is a water cooled condenser? when does it used?
  • What is an evaporative cooled condenser? when does it used?
  • What is a damper?
  • What is a filter?
  • What is difference between a fan and a blower?
  • What is Cascade refrigeration?
  • What is a Cascade Heat Exchanger?
  • What is the lowest temperature which can be achieved with Cascade Refrigeration?
  • What is multi-compressor refrigeration?
  • What is a Flash Chamber?
  • What would be the disadvantages of using Single Stage Compression in place of Multi-   Compression Refrigeration?

.What is the difference between Inter-cooling and Flash Inter-cooling?

  • What is centrifugal compression refrigeration?
  • What is vortex tube refrigeration?
  • ABSORPTION REFRIGERATION
  • What is an Analyzer?
  • What is a rectifier?
  • What is a Generator?
  • Compare vapor compression and vapor absorption refrigeration.
  • THERMO-ELECTRIC REFRIGERATION
  • What is thermo-electric refrigeration?
  • What is a Thermo-couple? Give Examples.
  • What is a Semi-Conductor? Give Examples.
  • What is a Positive Semi-Conductor? Give Examples.
  • What is a Negative Semi-Conductor? Give Examples.
  • What is Figure of Merit?
  • STEAM JET REFRIGERATION
  • What is steam jet refrigeration?
  • What is meant by Steam Jet?
  • What is meant by efficiency of a nozzle?
  • What is meant by efficiency of entrainment a nozzle?
  • What is meant by efficiency of a compressor? 
  • APPLICATIONS
  • Which are the practical applications of Cascade Refrigeration?
  • Which are the practical applications of Steam-Jet Refrigeration?
  • Which are the practical applications of Vortex Tube Refrigeration?
  • Which are the practical applications of Centrifugal Refrigeration?
  • Which are the practical applications of Vapor Compression Refrigeration?
  • Which are the practical applications of Vapor Absorption Refrigeration?
  • Which are the practical applications of Thermo-electric Refrigeration?
  • LIQUEFACTION OF GASES
  • What is Joule Thomson Coefficient? What are its units? Where does it used and why?
  • When will Joule Thomson Coefficient  be positive?
  • When will Joule Thomson Coefficient be negative?
  • When will Joule Thomson Coefficient  be zero?
  • What is an inversion temperature?
  • What is the principle of liquefaction of gases?
  • What is liquefaction of gases? Why is it required?
  • Which are the different methods of liquefaction of gases? Which one is better and why?
  • What is magnetic cooling? What is the minimum temperature achieved by this method?