LESSON 2
PRACTICE EXERCISE
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.
All exercises of this less are of equal weight.
The total
weight is 100.
1.
The technical controller must have knowledge of several circuit
factors before he can attempt to interface DC telegraph loops. Four
of the factors he must know are the
a.
type of code transmitted, battery source, speed of transmission,
and amount of battery voltage.
b.
direction of current, type of code transmitted, battery source,
and speed of transmission.
c.
battery source, speed of transmission,
amount
of
battery
voltage, and type of code transmitted.
d.
speed of transmission, amount of battery voltage, and type of
code transmitted.
2.
Assume that you receives a report that turnover
exists
on
a
DC
telegraph circuit. This report indicates that the
a.
signal line is connected to the contact points of a relay, and
the keyed line is connected to the line winding.
b.
signal line has been connected to the bias winding of a polar
relay rather than to the line winding.
c.
current is in the wrong direction through the line winding of a
polar relay.
d.
current is in the wrong direction through the bias winding of a
polar relay.
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