Hot water boiler limit controls are usually set at ____________________°F.
Fill in the blank(s) with the appropriate word(s).
200
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A new refrigerant, required to be used in the USA beginning in year 2021, is ________.
A) SNAP 2011 B) R 1234yf C) R 134a D) R 744
Apomixis is a form of incompatibility in plants
Indicate whether the statement is true or false
Nitrogen enters a steady-state process at T = 150 K and P = 0.1 MPa. A compressor increases the pressure to 0.4 MPa, and is followed by a heat exchanger. A second compressor increases the pressure to 2 MPa and feeds into a second heat exchanger. Each heat exchanger lowers the temperature isobarically to 150 K. If each compressor is adiabatic and has an efficiency of 80 %, determine the TOTAL work added per kilogram of nitrogen and the TOTAL heat removed per kilogram of nitrogen. Use Figure 2-3 for data.
A. +192 kJ/kg; -210 kJ/kg B. +298 kJ/kg; -4556 kJ/kg C. +154 kJ/kg; -172 kJ/kg D. +192 kJ/kg; -172 kJ/kg E. Insufficient information to solve
What is the major advantage a top air discharge condensing unit has over a side air discharge condensing unit?
What will be an ideal response?