EXERCISES, LESSON 2
INSTRUCTIONS: Answer the following exercises by circling the lettered response that
best answers the question.
After you have answered all of the exercises, turn to "Solutions to Exercises" at
the end of the lesson and check your answers. For each exercise answered incorrectly,
reread the lesson material referenced after the solution.
Why is it theoretically impossible for the vacuum regulator of the model 306M
programmable suction system to leak, clog, jam, or stick?
a. Because it is removed from the vacuum path.
b. Because the system has no vacuum regulator.
Because its interior is coated with Teflon.
d. Because of the system's unique immersion-bath feature.
The collection-jar system of the programmable suction pump features a
disposable filter which is both hydrophobic and bacterial. What does this mean?
a. The filter absorbs liquid and is composed of bacteria.
b. The filter is afraid of water and composed of bacteria.
The filter passes liquid and kills bacteria.
d. The filter repels liquids and retains bacteria.
What feature in the charging circuit prevents simultaneous operation from external
and internal power sources?
b. Reciprocation of switches S2A and S2B.
The power-out feature.
d. The isolation provided by blocking diode D7.