and CORRECT Answers
Which one of the following logic elements describes a circuit with two normally open
switches in series? - CORRECT ANSWER-✔✔ AND
OR logic is formed by _____________. - CORRECT ANSWER-✔✔ two normally open
switches in parallel
Devices called __________ often serve as the brains of an automated machine. - CORRECT
ANSWER-✔✔ relays
Which of the following is an element of control logic? - CORRECT ANSWER-✔✔ NOR,
AND, NOT (All of the above)
Which device provides the means by which electrical circuits control pneumatic or hydraulic
systems? - CORRECT ANSWER-✔✔ solenoid-operated directional control valve
Which of the following logic elements describes two or more normally closed switches in
parallel? - CORRECT ANSWER-✔✔ NAND
A power diagram is needed with a ladder diagram to __________. - CORRECT ANSWER-
✔✔ determine what signals are being sent to the power device
Which of the following statements is not true of a ladder diagram - CORRECT ANSWER-
✔✔ It can have more than one output device on each rung.
Which of the following is a rule for drawing a ladder diagram? - CORRECT ANSWER-✔✔
label all components, number all rungs, use only one load per rung. (All of the above)
Which of the following elements describes two or more normally closed switches in series? -
CORRECT ANSWER-✔✔ NOR