2-46.
Switches that have several positions the
operator can select by turning a knob are
which of the following types of switches?
1. Rotary switches
2. Pushbutton switches
3. Alternate-action toggle switches
4. Momentary-action toggle switches
2-47.
All of the following are characteristics of
thumbwheel switches except which one?
1. They have alphanumeric characters
built in
2. Each position is locked until another
position is selected
3. The position values are usually
marked on the controlling unit cover
4. The positions are selected by dialing
the switch
2-48.
Pushbutton switches may not have
indicators.
1 . T r ue
2. False
2-49.
On toggle switches, which of the following
can be uses of the neutral position?
1. Interact with software
2. Set a parameter
3. Disable a locked up/down position
4. Each of the above
2-50.
Alternate-action toggle switches may have
which of the following positions?
1. Permanent up and return to neutral
only
2. Permanent up and down only
3. Either permanent up and return to
neutral or permanent up and down,
depending on design
4. On and off
15
2-51.
Momentary-action/contact, two-position
toggle switches are normally used for
which of the following purposes?
1. To turn the unit on
2. To initiate an operation
3. To provide status information
4. To turn the unit off
2-52.
On a three-position toggle switch, the
center position may be used for which of
the following purposes?
1. To set a parameter only
2. To disable the locked up/down
position only
3. Either to set a parameter or to disable
the locked up/down position,
depending on the function
4. To provide status information
2-53.
You should expect to find all of the
following types of information about
controlling units in the technical manuals
and owner’s manuals of your system except
which one?
1. General description of the unit
2. Tables and figures to describe each
control and indicator
3. Circuit diagrams with information for
maintenance
4. Manufacturing specifications and
design requirements
2-54.
In addition to operational programs, what
other type of programs will you be using to
perform preventive maintenance?
1. Diagnostic programs
2. Applications programs
3. Word processing programs
4. Database management programs
