The evaporation process occurs when:
A) A liquid is above its critical temperature. B) A liquid has reached critical mass.
C) A liquid is below its boiling point. D) A liquid is below its critical pressure.
C
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This electrical component allows current to flow in only one direction and operates similar to a check valve
A) Bleed resistor B) Semiconductor C) Diode D) Capacitor
If you were to measure the opposition to current flow in a circuit, you would use a(n) ____.
A. voltmeter B. ammeter C. ohmmeter D. oscilloscope
When do normally open relay contacts close?
A) When the relay coil is energized B) When the relay coil is de-energized C) When they receive power D) They cannot close because they are open contacts.
Which step is NOT required in developing ladder logic with comparison instructions?
A) Determine the use of the one-shot instruction. B) Determine the Boolean equations for all comparison instruction rungs. C) Determine the complete description of the types of comparisons. D) Identify the outputs controlled by comparison instructions.