Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Which of the following is an element of control logic?
a. | NOR | d. | All of these | b. | AND | e. | None of these | c. | NOT |
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2.
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Which one of the following logic elements describes a circuit with two
normally open switches in series?
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3.
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NOT logic is formed by
a. | two normally closed switches. | c. | one normally open
switch. | b. | two normally open switches. | d. | one normally closed switch. |
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4.
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OR logic is formed by
a. | two normally closed switches in series. | d. | All of the
these | b. | two normally open switches in parallel. | e. | None of the these | c. | two normally closed
switches in parallel. |
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5.
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Which one of the following elements describes two or more normally closed
switches in series?
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6.
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Which of the following logic elements describes two or more normlly closed
switches in parallel?
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7.
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Which type of logic element uses a relay?
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8.
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Which of the following statements is not true of a ladder diagram?
a. | It arranges wires in orderly rows. | c. | It can have more than one input
device on each rung. | b. | It can have more than one output device on each
rung. | d. | It shows input
devices on the left side. |
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9.
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Which of the following is a rule for drawing a ladder diagram?
a. | Label all components. | d. | All of these | b. | Number all rungs. | e. | None of these | c. | Use only one load
per rung. |
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10.
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What device provides the means by which electrical circuits control pneumatic or
hydraulic systems?
a. | Relay | c. | Solenoid-operated directional control valve | b. | Motor | d. | None
of these |
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11.
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Which of the following shows the connections for power devices?
a. | Ladder diagram | c. | Wiring diagram | b. | Power diagram | d. | Schematic
diagram |
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12.
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A power is needed with a ladder diagram to
a. | show what type of output will result. | d. | all of these | b. | show the logic of
the circuit. | e. | none of
these | c. | determine what signals are being sent to the power
device. |
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13.
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Devices called __________ often serve as the brains of an automated
machine.
a. | switches | c. | relays | b. | latches | d. | power supplies |
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14.
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Which of the following is not a component of a ladder diagram?
a. | Input device | c. | Conductors | b. | Output device | d. | Valve |
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Matching
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Segment 1
a. | series | d. | parallel | b. | OR | e. | Switches | c. | six | f. | AND |
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15.
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_________ are the input devices that send messages to the relay based control
logic circuit.
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16.
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There are ________ elements of control logic.
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17.
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A(n) AND logic circuit consists of two N.O. pushbutton switches wired in
_________.
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18.
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A(n) OR logic circuit is formed by two N.O. pushbutto switches wired in
__________.
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19.
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A common application of _________ logic is shearing press.
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20.
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A common application of _________ logic is two remote Start/Stop
stations.
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Segment 2
a. | N.C. | d. | NOR | b. | stop | e. | relay | c. | NAND |
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21.
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NOT circuits use ___________ switch contacts to perform their
operations.
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22.
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A control __________ is the device used to perform the memory function in an
electrical logic circuit.
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23.
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A _______ button switch uses N.C. contacts
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24.
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A remote stop pushbutton is created with a(n) ___________ logic
element.
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25.
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A common application of ___________ logic is the interior light circuit on in a
car.
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Segment 3
a. | Input devices | f. | four | b. | output | g. | right | c. | ladder | h. | vertical | d. | number | i. | series | e. | rungs | j. | Conductors |
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26.
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____________ diagrams are used to represent electrical control circuits in a
way that makes them easy to read.
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27.
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There are ________ basic components of a ladder diagram.
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28.
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The power supply in a ladder diagram is represented by two ________
lines.
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29.
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___________ are always connected between the positive side and the output
devices of the power supply.
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30.
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Output devices are always located on the __________ side of a ladder
diagram.
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31.
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_________ are the electrical wires that connect the control circuit.
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32.
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All horizontal levels, called _______________ , should be numbered in a ladder
diagram.
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33.
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Each rung should contain a single __________ device.
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34.
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Outputs should never be wired in ____________.
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35.
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Wires that are connected directly together in a control circuit are given the
same ______________.
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Segment 4
a. | the same | d. | never | b. | spring | e. | power | c. | coil | f. | valves |
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36.
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Solenoid-operated directional control ___________ provide the means by which
electrical circuits can control the operation of pneumatic or hydraulic systems.
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37.
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A(n) ____________ diagram shows the connections for the power divices.
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38.
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When the __________ on a solenoid-operated directional control valve is
activated, the valve shifts causing a change of flow direction.
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39.
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The electrical connections on a power diagram and those on the ladder diagram
should be numbered ___________.
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40.
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A(n) ___________ causes the valve to shift when the valve’s solenoid is
turned off.
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41.
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Power devices are ________ represented in a control diagram.
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