In a conventional B/C ratio:
(a) Disbenefits and M&O costs are subtracted from benefits
(b) Disbenefits are subtracted from benefits, and M&O costs are subtracted from costs
(c) Disbenefits are subtracted from benefits, and M&O costs are added to costs
(d) Disbenefits are added to costs, and M&O costs are subtracted from benefits
(c) Disbenefits are subtracted from benefits, and M&O costs are added to costs
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Maintenance costs for a regenerative thermal oxidizer increased according to an arithmetic gradient for 5 years. The cost in year 1 was $7000. If the interest rate is 10% per year and the present worth of the costs for a 5-year period was $28,800, the amount of the yearly increase, G, was closest to:
(a) $1670 (b) $945 (c) $620 (d) $330
Capillarity in soils ________
A) involves both adhesion and cohesion B) is not involved in the process of water uptake from soils C) is independent of the matric potential in soils D) is enhanced by the symmetrical nature of the water molecule E) does not account for unsaturated water movement in soils
Capacitors block the flow of ________ current but allow ________ current to pass
A) Weak: strong B) DC; AC C) AC; DC D) Strong; weak
The silicon diode shown in Figure P9.22 is described by:
where at T = 300 K
vS = VS + vs = 4.2 V + 110 cos(?t)mV
? = 377 rad/s R = 7 k?
The DC operating (quiescent) point Q and the AC small-signal equivalent resistance at Q are:
IDQ = 0.548mA VDQ = 0.365V rd = 47.45?
Determine the AC voltage across the diode and the AC current through it.
