An R-22 system has a 28-ft lift and a 7 psi pressure drop in the liquid line due to vertical lift. If the liquid leaves the condenser at 244 psi, what is the pressure at the top of the vertical lift?
A) 214 psi B) 230 psi C) 223 psi D) 237 psi
C
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A diaphragm switch can be used to sense a much higher pressure than a metal bellows type switch.
Answer the following statement true (T) or false (F)
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Most drive failures occur in the ____ section, where you will find power SCRs, transistors, MOSFETs, and so on.
A. power B. control C. feedback D. transistor
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The forward bias voltage required for an LED is ________
A) 1.5 to 2.2 volts B) 0.3 to .05 volt C) 4.5 to 5.1 volts D) 0.5 to 0.7 volt
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How is a temperature-pressure relief valve on a hot-water boiler tested?
What will be an ideal response?
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