LESSON 2
LOCAL-BATTERY TELEPHONES
CREDIT HOURS .......................................................... 2
TEXT ASSIGNMENT ................................................... TM 11-678, para 41-60
MATERIALS REQUIRED ............................................ None
LESSON OBJECTIVE .................................................. To familiarize you with the design and the principle of
operation of the components of the local-battery
telephone set
SUGGESTIONS ............................................................ None
LESSON EXERCISES
In each of the following exercises, select the ONE answer that BEST completes the statement or answers the
question. Indicate your solution by circling the letter opposite the correct answer in the subcourse booklet.
1. When two local-battery telephone sets are connected together to form a telephone circuit, the signaling
circuit consists of a
a. battery, a ringer, and a generator.
b. transmitter, a receiver, and a battery.
c. generator, a ringer, and the connecting lines.
d. receiver, a transmitter, a generator, a ringer, and the connecting lines.
2. Each telephone of a local-battery telephone system contains dry cell batteries. The purpose of the
batteries is to enable the user to
a. signal the operator.
c. signal the other party.
b. hear the other party.
d. talk to the other party.
3. The characteristic of the dry cell battery which makes it unsuitable for delivering continuous current for
long periods of time is the
a. low EMF.
c. high initial cost.
b. polarizing action.
d. limited current capacity.
410 L2
7
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