Chapter 40: Basic Troubleshooting
MULTIPLE CHOICE
1. A(n) ____ is useful in troubleshooting for determining an open circuit or a short circuit.
a.
voltmeter
c.
ammeter
b.
ohmmeter
d.
isolation transformer
2. A(n) ____ is useful for measuring the voltage drop across a component with- out removing it from the
circuit.
a.
voltmeter
c.
ammeter
b.
ohmmeter
d.
isolation transformer
3. The loading resistance of a voltmeter should be ____ M/volt to minimize the loading effect.
a.
5
c.
15
b.
10
d.
20
4. A(n) ____ measures the current flow for the entire circuit or the flow through individual components.
a.
oscilloscope
c.
ammeter
b.
voltmeter
d.
isolation transformer
5. A(n) ____ isolates the circuit that does not use a transformer for its power supply.
a.
isolation transformer
c.
oscilloscope
b.
voltmeter
d.
ammeter
6. The most common type of defect during printed circuit board assembly is ____.
a.
open circuits
c.
missing parts
b.
short circuits
d.
misoriented parts
7. An open circuit has a(n) ____ resistance.
a.
negative
c.
infinite
b.
zero ohms
d.
very small
8. A short circuit has ____ resistance.
a.
very small
c.
negative
b.
infinite
d.
zero ohms
9. If a resistor increases in resistance, the results will be similar to that of a(n) ____.
a.
open circuit
c.
circuit with missing parts
b.
short circuit
d.
circuit with misoriented parts
10. If a resistor decreases in resistance, the results will be similar to that of a ____.
a.
circuit with missing parts
c.
short circuit
b.
circuit with misoriented parts
d.
open circuit
COMPLETION
1. A(n) ____________________ diagram provides more detail than the block diagram by showing the
individual components of a circuit using schematic symbols and how they are interconnected in a
circuit.
2. A(n) ____________________ circuit is the term used to identify an unintended connection or a
defective component with zero ohms resistance.
3. If a trace ____________________ it acts like a resistor that has opened and the circuit will not work or
will only partially work.
SHORT ANSWER
1. Elaborate on the third step in effective troubleshooting.
2. Discuss the most important document when troubleshooting a circuit.
