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NEETS, Module 16, Introduction to Test Equipment, NAVEDTRA 172-16-00-84, Naval Education and
Training Professional Development and Technology Center, Pensacola, Fla., 1984.
ANSWERS TO QUESTIONS Q1 THROUGH Q20.
A-1.
A bridge circuit is balanced when the opposite legs of the comparing and measuring circuits
exhibit the same voltage drop.
A-2.
The capacitive and inductive characteristics of the test leads.
A-3.
As the supply voltage increases, bridge components may heat up and become less accurate.
A-4.
Small values of resistances.
A-5.
A standard capacitor.
A-6.
Both measure phase angle and magnitude in determining impedance.
A-7.
High vswr, which equates to poor reception or a loss of power output.
A-8.
DB, dBm, and vu.
A-9.
600-ohm load.
A-10.
DB meters are used for measuring sine waves. Vu meters are used to measure the average value
of complex waveforms.
A-11.
Current transformers.
A-12.
Electronic wattmeters are capable of measuring high-fequency signals.
A-13.
Most in-line wattmeters are capable of measuring both forward and reflected power.
A-14.
Temperature-sensitive material that exhibits a large negative temperature coefficient.
A-15.
Temperature, mass, and time.
A-16.
As power is applied, the medium heats up in proportion to the applied power.
A-17.
The National Bureau of Standards.
A-18.
They are used to monitor fixed motor speeds.
A-19.
Monitor a submultiple frequency to prolong the flasher-tube life.
A-20.
Power is absorbed by the frequency meter cavity; and a pronounced dip in power, at the output,
will be observed.
