Medium (and High) Voltage and Insulation Exam
2026/2027 Questions And Answers Graded A+
It is important to check a high voltage detector on a known (energized) voltage
source or ? verifier before taking a measurement on an unknown voltage source.
c.piezo
A noncontact voltage detector is a test instrument that indicates the presence of
voltage without displaying the actual amount of voltage present.
True
A(n) ? high voltage meter is a voltmeter specifically designed to take
measurements on high voltage cables.
a.contact
High voltage test probes should not be used to take measurements in high current
applications such as ? .
all of the above
, A high voltage ammeter is a test instrument specifically designed to identify the
three phases of a three-phase distribution system as L1, L2, and L3.
False
Noncontact high voltage ? are designed to be used as current clamps but have open
ends (a U shape) to allow safer current measurements.
Ammeters
Typically any voltage above 50 VAC is considered an electrical shock hazard.
True
When energized parts of an electrical circuit are exposed, such as where
conductors are terminated at fuse or circuit breaker panels, ? is used as the
insulator.
b.
distance
Why must cable heights be re-measured occasionally?
d.All of the above
2026/2027 Questions And Answers Graded A+
It is important to check a high voltage detector on a known (energized) voltage
source or ? verifier before taking a measurement on an unknown voltage source.
c.piezo
A noncontact voltage detector is a test instrument that indicates the presence of
voltage without displaying the actual amount of voltage present.
True
A(n) ? high voltage meter is a voltmeter specifically designed to take
measurements on high voltage cables.
a.contact
High voltage test probes should not be used to take measurements in high current
applications such as ? .
all of the above
, A high voltage ammeter is a test instrument specifically designed to identify the
three phases of a three-phase distribution system as L1, L2, and L3.
False
Noncontact high voltage ? are designed to be used as current clamps but have open
ends (a U shape) to allow safer current measurements.
Ammeters
Typically any voltage above 50 VAC is considered an electrical shock hazard.
True
When energized parts of an electrical circuit are exposed, such as where
conductors are terminated at fuse or circuit breaker panels, ? is used as the
insulator.
b.
distance
Why must cable heights be re-measured occasionally?
d.All of the above
