Technician a says that R-1234yf may be used to retrofit an R-134a system. Technician B says that R-1234yf is an ozone depleting gas
A) A only
B) B only
C) Both A and B
D) Neither A or B
Answer : D) Neither A or B
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Most contractors use a standard format of summary to capture all the main components of an estimate.
Answer the following statement true (T) or false (F)
In an ideal parallel resonant circuit, the total current into the L and C branches is ________
A) maximum B) zero C) high D) low
Southern industrialists began switching from white laborers to slave laborers in the 1820s __________
A) because they believed slaves were more skilled B) to eliminate the threat of strikes C) because they believed slaves had a higher tolerance for the heat required in the production of iron and textiles D) because they were unable to find enough whites to fill the positions
A system has an impulse response h(t) = 4 e ?4t u (t) . Find and plot the response of the system to the excitation x(t) = rect(2 (t ? 1/4) ) .
What will be an ideal response?