True/False
Indicate whether the
statement is true or false.
|
|
|
1.
|
Plunger type voltage testers can be used to test control systems that operate on
low voltage, such as 24 volt systems.
|
|
|
2.
|
When deenergizing or energizing a control cabinet or motor control center
module, the electrician should be dressed in flame retardant clothing while wearing safety glasses, a
face shield, and hard hat.
|
|
|
3.
|
Overload relays are intended to disconnect the motor from the power line in the
event that the current draw becomes excessive.
|
|
|
4.
|
When using an ohmmeter, make certain that the power is connected to the
circuit.
|
|
|
5.
|
It is possible to troubleshoot a circuit without a working knowledge of
schematics.
|
Completion
Complete each
statement.
|
|
|
6.
|
The voltmeter and ohmmeter are generally contained in the same meter. These
meters are called ____________________.
|
|
|
7.
|
The ____________________ indicates the amount of potential between two
points.
|
|
|
8.
|
One of the basic rules for series circuits is that the voltage drop across all
circuit components must equal the applied ____________________.
|
|
|
9.
|
The amount of voltage drop across each component in a series circuit is
proportional to the resistance of the components and the amount of ____________________ flow.
|
|
|
Figure 42-14 
|
|
|
10.
|
Ammeter readings in the accompanying figure indicate that the motor is
____________________.
|
Short Answer
|
|
|
11.
|
What are the three main instruments that an electrician uses to troubleshoot a
circuit?
|
|
|
12.
|
Why do some electricians prefer to use a plunger type voltage tester?
|
|
|
13.
|
What is the advantage that clamp-on type ammeters have?
|
|
|
14.
|
If an overload relay that is a thermal type has tripped several times, what is
the likely cause of the problem?
|
|
|
Figure 42-15 
|
|
|
15.
|
What is indicated by the ammeter readings shown in the accompanying
figure?
|