Decreasing the cfm through the evaporator will result in a ____________________ in the head pressure.
Fill in the blank(s) with the appropriate word(s).
decrease
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?A 5:12 pitch can be drawn at an angle of _____ degrees.
A. ?22 1/2 B. ?18 C. ?20 D. ?24
__________ are used to measure very low pressures and sometimes vacuums on air conditioning, heating and refrigeration systems.
A. Anometers B. Manometers C. Thermometers D. Volt-ohm milliammeters
For the circuit shown below, let vS(t) = 575 cos(2?60t + 30o), R1 = 35 ?, R2 = 53 ?, L = 76 mH, C1 = 117 ?F, C2 = 106 ?F
(a) Find impedances ZL, ZC1, ZC2, and phasor VS for vS(t).
(b) Find the equivalent impedance Za of parallel combination of ZC2 and ZR2 + ZL.
(c) Find the total impedance Zt seen from the voltage source.
(d) Find the phasor for the current I.
(e) Find the phasor for Vo across the capacitor C2.
How do you load test the resistance of a modules power circuit?
A. Connect an equivalent load via the module connection stub and measure voltage drop. B. Use a breakout box and measure voltage drop when the module is powered. C. Connect a DMM in series with the ground circuit and measure the voltage drop. D. Measure the resistance across the modules power and ground pins.