Test for Understanding for Control of Static Electricity
Name : ________________________
1) Static Electricity is generated....
a)only when two highly charging materials are rubbed together.
b)only when humidity is very low.
c)anytime any two materials contact and separate.
d)by lightning. ( )
2) By nature, static electricity
a) is stored electric energy.
b) creates and radiates an electric field.
c) can create energy by "moving" electric current.
d) all of the above. ( )
3) If a person does not feel a shock when handling a static sensitive device or static sensitive
assembly, then it is not possible to damage that device or assembly.
a)true
b)false ( )
4) A good approach to control of static electricity is:
a) handle all static sensitive devices only while you are grounded or bonded
b) make certain you know how to hold static sensitive devices.
c) use static precautions only on individual devices, because once the device is
mounted on a board it is safe from static. ( )
5) A static safe workstation...
a) controls charge on everything and everybody in the workstation.
b) includes operators who must wear a grounded wrist strap and wrist strap cord
when seated, and may wear heel grounders when mobile.
c) has a static dissipative work surface connected to ground.
d) is free of electrical insulators such as non-ESD plastics, papers (papers may be
inside static shielding bags or ESD sheet protectors), coats, etc.
e) may include an air ionizer.
f) may include a floor mat (and if it does the person must wear two heel grounders)
g) all of the above. ( )
6) A daily "self-check" of my static safe workstation, done at the beginning of each shift
includes...
a)looking to see that the tablemat is connected to ground
b)measuring plant humidity
c)looking for and removing non-essential insulators (such as plastic)
d)If air ionizers are used, making certain they are turned on, and "bathe" the
work surface.
e)a,c,d ( )
7) If I am asked to handle a device or assembly, and I don't know if it is static sensitive, I
should...
a)go ahead and handle the part but ask my supervisor at break or the end of the
shift about the procedure.
b)assume that the part is sensitive to damage from static electricity and proceed
accordingly.
c)before I handle the part, ask my supervisor for direction.
d)none of the above is correct. ( )
8) Another procedure of controlling static electricity requires that before a static sensitive
device or assembly leaves a static safe workstation, it is placed inside a closed static safe
container, and before that device or assembly is removed from the container, the person must
be in a static safe work area.
a)false
b)true ( )
9) Sometimes in final product assembly, where the product is physically too large to sit in a
static shielding container, or can not be in a static safe work area, compromises must be
made. In this case the best practice is to "bond" to the frame by attaching a wrist strap and
cord to the unit frame.
a)true
b)false ( )
10) Materials and equipment used to control of static electricity requires regular testing or
monitoring.
a)false - some materials are permanent, and dont require monitoring.
b)true - even permanent materials can become covered with dirt or disconnected
c) from ground. ( )
