How many contacts can a sequencer have? Do they close in unison?
What will be an ideal response?
Sequencers can have as many as five sets of contacts that close at different intervals after the control has been energized.
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rations, is a poor choice.
Indicate whether the statement is true or false.An inductive reactance (XL) of 140 ? is in parallel with a capacitive reactance (XC) of 350 ?. The parallel combination is in series with a 270 ? resistor. The sine wave ac source is generating 12 V. The circuit impedance is
A) 357 ? B) 559 ? C) 100 ? D) 233 ?
Temperature is an indication of the ____.
A. amount of heat in a material B. density of the material C. amount of molecular activity in the material D. weight of the total mass of the material
When reference is made to ____, the time function may start on one or more of the contacts at energization, or at any time after energization during a preset time cycle.
a. sensors b. time-delay relays c. timers d. pressure switches