A system has an impulse response, 
(a) Sketch the magnitude and phase of the frequency response of these two systems in a parallel connection.
(b) Sketch the magnitude and phase of the frequency response of these two systems in a cascade connection.
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The vertical side of the frame is called the web.?
Answer the following statement true (T) or false (F)
A major difference between common HVAC systems and air turnover systems is that air turnover systems _____.
a. cannot provide cooling b. are direct-fired units c. are designed to encourage stratification d. often use propeller fans to circulate the air
For a permanently installed swimming pool, any 15- or 20-ampere, 125 through 250 volt rated receptacle located within __________ feet of a pool's inside wall must be GFCI protected.
a. 3 b. 10 c. 12 d. 20
A(n) ____________________is the amount a line needs to be rotated to bring the line into coincidence with another line.
Fill in the blank(s) with the appropriate word(s).