Give the approximate U-value of:
(a) single clear sheet of glass
(b) single tinted sheet of glass
(c) an IGU with clear sheets of glass and dry air space
What will be an ideal response?
(a) single clear sheet of glass 1.0
(b) single tinted sheet of glass 1.0
(c) an IGU with clear sheets of glass and dry air space 0.5
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Define convex
What will be an ideal response?
The TXV sensing bulb is mounted ____.
A. on the liquid line between the condenser and the TXV B. at the inlet to the condenser C. on the suction line between the evaporator and the compressor D. on the compressor discharge line
An oil furnace heat exchanger is built:
A) Like a drum. B) Like a clamshell. C) Like a tube in a serpentine shape. D) Oil furnaces do not require heat exchangers.
In the system of Figure E-17 let the CTFT of the the excitation be 
This system is sometimes called a scrambler because it moves the frequency components of a signal to new locations making it unintelligible.
(a) Using only an analog multiplier and an ideal filter, design a “descrambler” that would recover the original signal.
(b) Sketch the magnitude spectrum of each of the signals in the scrambler-descrambler system.