TPC ELECTRICAL MEASURING INSTRUMENTS EXAM SOLVED #19
If an oscilloscope does not have a free-running sweep, it will have a(n) sweep. - correct
answer Triggered
Strong harmonics of the original sine wave frequency of 60 Hz can appear in an ac
power line. They are
Usually caused by ____________ loads. - correct answer nonlinear
The process of filling in the missing parts of a measured wave between sample points
on an oscilloscope
Is called - correct answer interpolation
Slope and trigger controls give you precise control over exactly where on the waveform
you want the
Screen display to - correct answer begin
An attenuating probe is used to minimize the effects of - correct answer circuit loading
Circuit resistance is measured by a(n) - correct answer ohmmeter
Because resistance readings must be taken with the system power off, every ohmmeter
must carry its
Own - correct answer battery supply
To test the condition of the insulation on motor windings, use a(n) - correct answer
megohmmeter
When you need to measure very small resistances, use a ____________ ohmmeter.
When you need to
Measure larger resistances, in the range of several kilo-ohms, use a series ohmmeter. -
correct answer shunt
A shorted capacitor will exhibit ____________ resistance when tested with a
megohmmeter. - correct answer little or no
Graphical multimeters can perform functions that standard digital multimeters cannot,
such as - correct answer displaying transients
Using a GMM in the TREND mode allows you to - correct answer monitor line voltage
for sags and surges
When using a multimeter to measure voltage, what should you do after turning on the
device and turning
The range selector to its highest voltage? - correct answer Check the meter on a known
source
If an oscilloscope does not have a free-running sweep, it will have a(n) sweep. - correct
answer Triggered
Strong harmonics of the original sine wave frequency of 60 Hz can appear in an ac
power line. They are
Usually caused by ____________ loads. - correct answer nonlinear
The process of filling in the missing parts of a measured wave between sample points
on an oscilloscope
Is called - correct answer interpolation
Slope and trigger controls give you precise control over exactly where on the waveform
you want the
Screen display to - correct answer begin
An attenuating probe is used to minimize the effects of - correct answer circuit loading
Circuit resistance is measured by a(n) - correct answer ohmmeter
Because resistance readings must be taken with the system power off, every ohmmeter
must carry its
Own - correct answer battery supply
To test the condition of the insulation on motor windings, use a(n) - correct answer
megohmmeter
When you need to measure very small resistances, use a ____________ ohmmeter.
When you need to
Measure larger resistances, in the range of several kilo-ohms, use a series ohmmeter. -
correct answer shunt
A shorted capacitor will exhibit ____________ resistance when tested with a
megohmmeter. - correct answer little or no
Graphical multimeters can perform functions that standard digital multimeters cannot,
such as - correct answer displaying transients
Using a GMM in the TREND mode allows you to - correct answer monitor line voltage
for sags and surges
When using a multimeter to measure voltage, what should you do after turning on the
device and turning
The range selector to its highest voltage? - correct answer Check the meter on a known
source
