7-12.
7-13.
7-14.
7-15.
7-16.
How much oil is used on each
7-17.
oiling point on a 13-15 machine?
1.
One drop
2.
Two drops
3.
Three drops
4.
Until the oil wick is
saturated
What is the proper class and
variety of the needle used in the
31-15 machine?
1.
7 x 17
2.
16 x 87
3.
31 x 15
4.
87 x 16
A properly timed needle bar on a
31-15 sewing machine will have
the needle bar located so that
the point of the shuttle will be
how far above the eye of the
needle on its upstroke?
1.
1/16 in
2.
1/32 in
3.
1/4 in
4.
1/2 in
Prior to making any adjustments
on a sewing machine, a good rule
to follow is to do which of the
following?
1.
Set the stitch length to 0
spi
2.
Check the troubleshooting
chart
3.
Set the stitch length to 8
spi
4.
Remove the belt from the
clutch pulley
When the point of the needle
reaches the material, the feed
dogs should be at what position?
1.
On the down stroke and even
with the throat plate
2.
One full tooth above the
throat plate
3.
On the up stroke and even
with the throat plate
4.
One full tooth below the
throat plate
7-18.
7-19.
7-20.
7-21.
When adjusting the feed eccentric
on the 31-15, the stitch
regulator should be set at its
lowest position.
This is done so
the machine will do which of the
following?
1.
Form its shortest stitch
2.
Prevent any loose movement in
the feed eccentric
3.
Form its longest stitch
4.
Prevent the needle from
hitting the throat plate
What is the recommended setting
of the feed dogs for lightweight
material?
1.
One full tooth above the
throat plate
2.
Slightly more than one
above the throat plate
3.
Even with the throat p
4.
Slightly less than one
above the throat plate
When selecting a needle to
tooth
late
tooth
be
used on cloth, which of the
following type points would you
select?
1.
A diamond-shaped point
2.
A sharp round point
3.
A triangle point
4.
A half-round point
Why shouldn’t a cutting point
needle be used when sewing canopy
fabric?
1.
It will break the top thread
2.
It will break the bobbin
thread
3.
It will cut the warp and
filler threads
4.
It will not make a lock
stitch
What, if anything, is the purpose
of the grooves on both sides of a
16 x 87 sewing machine needle?
1.
They prevent the hook from
striking the needle
2.
They tell the class and
variety of the needle
3.
They serve no purpose
4.
They allow the thread to fall
back into the needle when it
enters the material
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