True/False
Indicate whether the
statement is true or false.
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1.
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Magnetic control systems generally operate on 240 volts.
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2.
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Most control transformers are made with one primary winding and two secondary
windings.
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3.
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Control transformers generally have screw terminals connected to the primary and
secondary leads.
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4.
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Many industries prefer to ground the control system and it is a very common
practice.
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5.
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Protection can be placed on the primary or secondary side of the control
transformer.
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Completion
Complete each
statement.
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6.
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There is a turns ratio of ____________________ between each primary winding and
the secondary winding.
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7.
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When one side of the secondary winding of a control transformer is grounded, the
control system is referred to as a(n) ____________________ system.
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8.
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When one side of the control transformer is not grounded, it is generally
referred to as a(n) ____________________ system.
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9.
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High impedance voltmeters can indicate some amount of voltage caused by the
capacitance of the ground and induced voltage produced by surrounding magnetic fields. These are
generally referred to as ____________________ voltages.
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10.
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Control transformers are generally protected by fuses or
____________________.
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Short Answer
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11.
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What is the voltage on which most magnetic control systems operate?
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12.
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How is voltage tested if one side of the control transformer is grounded?
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13.
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How is accurate voltage measurement made in a float control system?
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14.
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How do you determine the rated current of a transformer?
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15.
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Why is it that the secondary fuse size can be set at a lower percentage of the
rated current?
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