1. Plunger-type voltage testers are high-impedance devices and require several milliamperes to operate.
a. True
b. False
2. It is often necessary to troubleshoot a circuit with power applied to the circuit.
a. True
b. False
3. When using an ohmmeter, make certain that the power is connected to the circuit.
a. True
b. False
4. It is virtually impossible to troubleshoot a circuit without a working knowledge of schematics.
a. True
b. False
5. As a generally rule, it is easier to progress backward though the circuit until the problem is identified.
a. True
b. False
Name: Class: Date:
Unit 60 Troubleshooting Techniques
6. The voltmeter indicates the amount of potential between two points in much the same way a(n) ____.
a. thermometer indicates the temperature difference between two points
b. ammeter indicates the current difference between two points
c. tachometer measures the revolutions per minute of a revolving shaft
d. pressure gauge indicates the pressure difference between two points
7. The total or applied voltage in a series circuit must ____ the sum of the voltage drops across each component.
a. equal b. be below
c. approximate d. be above
8. Overload relays are intended to disconnect the motor from the power line in the event ____.
a. that the motor nameplate is destroyed
b. the timing relays cut out the starting resistors
c. that the current draw becomes excessive
d. of a voltage unbalance
9. Bimetal strip type overload relays can often be adjusted for a higher setting to offset the problem of ____.
a. low noise b. ambient temperature
c. moisture d. excessive wind
10. A good way to disconnect the power in most control circuits is to remove the ____.
a. control transformer fuse b. motor from the line
c. autotransformers from the line d. braking pressure smoothly
Name: Class: Date:
Unit 60 Troubleshooting Techniques