Which of the following refrigerant conversions is not considered a drop-in?
a. HFC-134a for HCFC-22
b. HCFC-409A for CFC-12
c. HFC-407C for HCFC-22
d. HCFC-123 for CFC-11
a
You might also like to view...
Construction drawings use an alphabet of__________.
A. circles B. arcs C. lines D. scales
How does power line carrier (PLC) trailer-to-tractor multiplexing transmit messages?
A. radio frequency signals superimposed over 12-volt auxiliary wire B. wirelessly C. optically using auxiliary fiber optics D. twisted wire pair
In an amusement park, wireless devices are used to post the queue length and wait time for each of the rides. Can you think of an infrastructure that could enable patrons to do online interaction? Assume appropriate requirements and a potential solution.
What will be an ideal response?
_______________ is the study of the movement of heat and energy within the universe
Fill in the blank(s) with the appropriate word(s).