School Sewing Machine Parts Diagram

Refer to the diagram of school sewing machine parts. Which component specifically regulates the tightness and looseness of the thread during stitching?

• Bobbin Winding Spindle

• Reverse button

• Thread Tension Control

• Presser Foot Lifter

Which # in the diagram (click to enlarge) allows you to go in REVERSE?

• Turn #24

• Push in #24

• Turn #27

• Push in #27

Using the parts diagram, which feature is used to start, stop, and control the speed of the sewing machine while sewing?

• Foot Feed pedal

• Bobbin Case under the throat plate

• Bobbin Winding Spindle

• Presser Foot Lifter lever

Based on the threading diagram and steps shown, after bringing the thread down between the tension discs (right after the spool), what is the next action in the upper-threading path?

• Insert the thread directly into the needle eye from back to front

• Draw the thread into the slot on the take-up lever from the right

• Place the thread under the presser foot and cut it at the thread knife

• Wind the thread onto the bobbin using the bobbin winding spindle

Which part of a sewing machine is turned to manually raise and lower the needle when positioning fabric or bringing up the bobbin thread?

• Hand wheel

• Presser foot

• Bobbin winding spindle

• Thread guide

In threading, what is the primary role of thread guides on a sewing machine?

• To keep the thread path aligned and control tension before the needle

• To clamp fabric layers together during stitching

• To store extra bobbins for quick changes

• To reverse the stitch direction without using the needle

Which component holds the fabric flat against the feed dogs so stitches form evenly?

• Presser foot

• Bobbin case

• Take-up lever

• Hand wheel

Based on the illustrated steps for threading the lower thread, which orientation is correct when placing the bobbin in the case?

• Mark facing upward with thread leading to the left; bobbin rotates counterclockwise while drawing thread

• Mark facing downward with thread leading to the right; bobbin rotates clockwise while drawing thread

• Mark facing upward with thread leading to the right; bobbin rotates clockwise while drawing thread

• Mark facing downward with thread leading to the left; bobbin does not rotate during threading

During bobbin threading, after drawing the thread to the right and passing point (a), what is the next correct action shown in the diagram?

• Guide the thread under the tension spring, around (b), then to the right of the thread knife (c) before cutting

• Lift the presser foot and pull the thread straight up to the take-up lever

• Turn the hand wheel backward to lock the bobbin and skip the tension spring

• Remove the bobbin and re-wind it until it spins clockwise

Skill/Concept: You are winding thread onto an empty bobbin. Which sequence best represents a correct basic procedure?

• Place bobbin in the bobbin case, engage presser foot, then wind by turning the handwheel counterclockwise

• Seat an empty bobbin on the winder spindle, route thread through the tension disc, engage the winder, then run the machine to fill evenly

• Insert the bobbin under the needle plate first, thread the needle, and wind while stitching

• Attach the bobbin to the needle clamp, pull thread directly from the spool without tension, and spin by hand