True/False
Indicate whether the
statement is true or false.
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1.
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Mechanical stops can be used to accurately position a pneumatic cylinder.
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2.
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Digital I/O interface modules connect a PLC’s inputs and outputs to
terminal blocks on printed circuit boards via a special pre-wired cable.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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3.
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_______________ mode is most often used during machine set up and maintenance to
test various parts of the machine and make adjustments.
a. | Automatic | c. | Manual | b. | Jog | d. | Cycle |
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4.
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Three types of electo-pneumatic valves are 3-position spring return, 2-position
detented, and ___________________.
a. | 2-position spring return | c. | 4-position spring
return | b. | 3-postion detented | d. | 4-position detented |
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5.
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To adjust actuator speed using flow control valves, turn the flow control valve
__________.
a. | CW to decrease speed, CCW to increase speed | c. | CCW to decrease speed, CCW to
increase speed | b. | CCW to decrease speed, CW to increase speed | d. | CW to decrease speed, CW to increase
speed |
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6.
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A motor that moves both forward and reverse requires ___________.
a. | a bidirectional motor starter | c. | no motor
starter | b. | a forward and reverse motor starter | d. | none of the
above |
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7.
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Limit switches should be adjusted so the contacts open or close just a the point
______.
a. | where the actuator stop is located | c. | slightly after where the actuator
stop is located | b. | slightly before where the actuator stop is located | d. | A or B |
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8.
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These three sensors all have short sensing ranges and sense the presence of an
object as well as different types of material.
a. | hall effect, photoelectric, and ultrasonic | c. | hall effect, inductive, and
capacitive | b. | hall effect, inductive, and photoelectric | d. | hall effect, capacitive, and
photoelectric |
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