A triple-duty valve serves as a shut-off valve, a balancing valve, and a _____
a. differential pressure valve
b. drain valve
c. zone valve
d. check val
d
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What is the first step when servicing a vehicle refrigeration (A/C) system?
A) Vacuum the system B) Mode door check C) Refrigerant identification D) Weigh the refrigerant charge
The op amp non-inverting amplifier uses ____ that provide negative feedback to control the op amp voltage gain.
a. capacitors b. transistors c. wires d. resistors
What is the purpose of an ice thickness probe on a cubed-ice machine?
a. It initiates and terminates defrost. b. It maintains proper ice cube temperature. c. It controls the dimensions of the ice cube. d. It prevents premature breaking of ice cube sheets.
Because of its ability to change AC to pulsating DC, the SCR can also be used in a circuit with an AC voltage source and a DC load. What is the economic benefit to this ability?
What will be an ideal response?