Which of the following functions are performed by limit switches?
A. detecting the position of an object
B. detecting the size of an object
C. counting parts
D. preventing movement of an object outside a safe zone
E. all of the above
Answer: E
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Horsepower is used to rate the _____.
a. length of operation of a motor b. synchronous speed of a motor c. output capacity of a motor d. thermal protection of a motor
The Chester White was one of the early bacon-type breed hogs
Indicate whether the statement is true or false.
How are motorized dampers controlled when they are used as bypass dampers?
A) They are wired in series with the zone dampers. B) They are wired using the G terminal on the master thermostat. C) They are wired in parallel with the zone dampers. D) A pressurestat measures the static pressure across the blower.
Which circuit switches data from a single input to multiple outputs?
A) Multiplexer B) Encoder C) Comparator D) Demultiplexer