True/False
Indicate whether the
statement is true or false.
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1.
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The double-acting push button has two terminal screws.
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2.
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Normally open switches are drawn with the movable contact above and touching the
stationary contact.
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3.
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The movable contact of the normally open held closed switch is drawn below the
stationary contact.
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4.
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The symbol for a limit switch illustrates a ball float.
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5.
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The flow switch symbol is used for both liquid and air flow switches.
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Completion
Complete each
statement.
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6.
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____________________ symbols are employed to represent many common control
sensing devices.
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7.
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Normally ____________________ switches are drawn with the movable contact below
and not touching the stationary contact.
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8.
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____________________ show components in their electrical sequence without regard
for physical location.
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9.
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____________________ switches are drawn by adding a wedge to one of the four
basic switches.
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10.
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The most common coil symbol used in schematic diagrams is the
____________________.
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Short Answer
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11.
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What does it mean when components are shown connected by a dashed line in a
schematic diagram?
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12.
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Name the four basic switch symbols.
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13.
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What is the function of the contact referred to as a holding, sealing, or
maintaining contact?
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14.
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What are the two basic types of timers?
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15.
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Describe the contact symbol.
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