10
2-7. Why should a small wattage soldering
iron NOT be used to solder large
conductors?
1. The current flow is limited
2. The iron cannot reach a high enough
temperature
3. The iron cannot maintain a
satisfactory soldering temperature
while giving up heat to the
conductor
4. The tip of a small wattage iron is too
small for large conductors
2-8. Which of the following features BEST
describes a well designed soldering iron?
1. It may be used for both large and
miniature soldering jobs
2. It is light weight with an all-purpose
tip
3. It can be automatically switched
from a low wattage to a high
wattage output
4. 4.It has a built-in self-regulating
element
2-9. What should be done with the removable
tip of a soldering gun after it becomes
pitted?
1. Dip it in flux and continue to use it
2. Discard the tip and replace it
3. Grind the tip down to the next
smaller size and reuse it
4. File the tip smooth and retin it
2-10. If, during the soldering process, the
soldering gun switch is depressed for
longer than 30 seconds, what danger
exists?
1. The insulation of the wire may be
burned
2. An oxide film will rapidly form on
the conductor
3. The flux may ignite
4. The finger switch may be locked in
the depressed position from the heat
2-11. What condition causes the nuts or screws
which hold the tip of a soldering gun to
loosen?
1. The trigger is depressed for too long
a period
2. The gun is pulsed too often
3. The heating and cooling cycle
loosens them
4. The gun is used for soldering items
beyond its capacity
2-12. Which of the following electronic
components should NOT be installed or
removed by the use of a soldering gun?
1. Transistors
2. Resistors
3. Capacitors
4. Each of the above
2-13. Why are resistance soldering irons safer
for electrical equipment components than
other soldering irons or guns?
1. The current flow is very low
2. The tips are hot only during the
brief period of actual soldering
3. The transformer provides a high
voltage for a measured period of
time
4. The tips are made from highly
conductive ferrous iron which heat
and cool very rapidly
2-14. For which of the following reasons is
antisieze compound used with a pencil
iron equipped with removable tips?
1. To allow the tip to be easily
removed
2. To prevent the tip form loosening
during repeated soldering operations
3. To minimize the number of times
the tip must be retinned
4. Each of the above
