Midterm Examination: MOPM

What is the main purpose of a sewing machine needle’s scarf?

• To strengthen the needle tip

• To reduce friction with the shuttle

• To hold the thread securely

• To attach the needle to the machine

Who invented the first practical sewing machine that employed a chain stitch?

• Elias Howe

• Isaac Singer

• Barthelemy Thimonnier

• Thomas Saint

What is the recommended needle size for multi-purpose sewing machines?

• DB/9

• DB/14

• DB/18

• DB/22

Which part of the sewing machine needle guides the thread during stitch formation?

• Eye

• Shank

• Long groove

• Tip

What does the term ‘bobbin’ refer to in sewing?

• The needle used for embroidery

• A thread spool on the sewing machine

• A small case holding lower thread

• The presser foot

What type of stitch is formed when upper thread and bobbin thread interlock inside the fabric?

• Chain stitch

• Lock stitch

• Overlock stitch

• Blind stitch

Which tool is used for marking fabric and can be erased by ironing over a white cloth?

• Tailor’s chalk

• Liquid marking pen

• Dermatograph/Dressmaker pencil

• Tracing wheel

What is the function of the ruffler foot on industrial sewing machines?

• To make hems

• To apply bias binding

• To add pleats or ruffles

• To attach zippers

When threading the upper thread of an industrial machine, through which part does the thread pass last?

• Take-up lever

• Thread tension disc

• Needle eye

• Thread guide

What should be done if the stitches are looping on the fabric?

• Increase upper thread tension

• Decrease bobbin tension only

• Balance upper and lower thread tensions

• Replace the needle