4
1-21. When taking measurements with two
ammeters connected in parallel, how do
you determine the resulting readings?
1. The current equals the sum of both
meter readings
2. The current equals the difference of
the two meter readings
3. The current equals the product of the
two readings divided by their sum
4. Read either meter directly; the same
current flows through both meters
1-22. Current tracers indicate the presence of a
current in which of the following ways?
1. By the lighting of an indicator lamp
2. By a clicking noise
3. Both 1 and 2 above
4. By the movement of a meter
1-23. Which of the following is an advantage
of using a current probe?
1. It is the most accurate method of
measuring current
2. It senses current by induction without
being connected directly into the
circuit
3. It is battery operated
4. It is capable of measuring current at
frequencies above 40 GHz
1-24. When troubleshooting a specific piece of
equipment, you can find an accurate
listing of resistance readings for specific
test points in which of the following
documents?
1. In equipment PMS cards
2. In test equipment manuals
3. In equipment technical manuals
4. In Naval Ships Technical Manuals
1-25. An ohmmeter that is used for field work
should meet which of the following
criteria?
1. It should be extremely accurate
2. It should be portable
3. It should be simple to operate
4. Both 2 and 3 above
1-26. When you use an analog multimeter to
measure resistance, which of the
following actions should you take first?
1. Make sure the meter is zeroed
2. Set the meter for dc voltage
3. Set the meter for ac voltage
4. Make sure the meter leads do not
exceed 36 inches
1-27. Digital multimeters are used to test
semiconductors for which of the
following reasons?
1. They produce voltage sufficient to
gate all Zener diodes
2. Their LED displays are easier to read
than analog displays
3. They typically limit the current flow
through the semiconductor to less
than 1 milliamp
4. They produce in excess of the 500
milliamps normally required to gate a
PN junction
1-28. Compensation for the resistance in test
leads of digital multimeters used to
perform resistance measurements is
accomplished by which, if any, of the
following methods?
1. Short the leads, note the lead
resistance displayed, and add this
value to subsequent resistance
measurements
2. Short the leads, note the lead
resistance displayed, and subtract the
value from subsequent resistance
measurements
3. Add 10% to the reading
4. None of the above
