A small circle on the output of a logic gate is used to represent the:
A) Comparator operation. B) AND operation.
C) OR operation. D) NOT operation.
D
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The Underground Railroad consisted of
A. an informal network of homes where slaves could hide on their escape to freedom. B. a train that hid slaves in cargo areas and carried them to freedom in the north. C. a vehicle for capturing and returning runaway slaves back to the south. D. a radical new transportation design. E. None of these choices are correct.
Briefly describe the use of an encoder used for feedback of speed and position of a rotor in a Servo motor.
What will be an ideal response?
When using a recovery machine manufactured before November 15, 1993, the recovery level for Type II systems containing over 200 pounds of R-12 refrigerant is:
A) 10" hg vacuum. B) 0 psig. C) 4" hg vacuum. D) 15" hg vacuum.
What is one major drawback of smaller-size vehicles for the technician?
What will be an ideal response?