Write the importance of food preservation. What are the causes of food spoilage?
Enlist the methods of food freezing.
What are the basic elements of controlling of air conditioning?
2.0 m³/s of moist air at a state of 30°C DBT, 21°C WBT and 101.325 kPa flows across a cooler coil and leaves the coil at 12°C DBT and 8.2 g/kg of dry air. Determine i) the apparatus dew point ii) the contact factor and by-pass factor iii) cooling load.
What are the causes of spoilage of food? Why it need to preserve? Explain.
What are the basic elements of controlling of air conditioning? Discuss their functions.
Briefly discuss the acoustic design in building air conditioning.
Define cooling load. What are the parameters for estimating cooling load? Describe the indoor and outdoor loads.
Describe the space heat gain for air-conditioning. What are the general guidelines for space cooling load calculations?
Briefly describe the essential components of air-conditioning system with net sketch.
What is refrigerant? Write the factors considered for the selection of refrigerant for a system.
How does thermo-static expansion valve work? Discuss with neat sketch.
Discuss the pressure control defrosting method.
What are the essential components of air conditioning system? Write their functions.
Describe the space heat gain for air conditioning. What are the general guidelines for space cooling calculations?
What is cooling load? Why is it needed? Describe the design day, outdoor loads and indoor loads.
Why do foods become spoilage? Explain
Write down the working principle of thermostatic expansion valve with neat sketch.
Differentiate among frosting evaporator, non-frosting evaporator and de-frosting evaporator. Also write the advantages of food preservation.
Describe the production of low temperature by adiabatic demagnetization of a paramagnetic salt with net sketch the schematic diagram.
What do you mean by refrigerant? Write the factors considered for the selection of refrigerant for a system.
How does thermo static expansion valve work? Discuss with net sketch.
Define the basic element of controlling of air conditioning. Discuss their function.
Calculate the sound power level of (i) a whisper that emits a power of 1MW and (ii) a rocket engine that emits 10 MW.