E Textile Quiz

What apparatus is essential in the circular knitting process to ensure a uniform yarn feed and prevent breakage, especially for conductive yarns?

• Cone stand or creel

• Measuring scale

• Oil Can

• Yarn Tensioner

The apparatus used to develop conductive fabrics iis the Bharat Circular Knitting Machine. Circular knitting is generally categorized as what type of fabric formation process?

• Weaving

• Warp Knitting

• Weft Knitting

• Braiding

Which interactive material changes its appearance when it is heated?

• Thermochromic ink

• Hydrochromic ink

• Carbon ink

• Photochromic ink

In the classification of smart fabrics, which category of fabric is defined as being able to sense a stimulus, react, and adapt its function to the environment?

• Active smart fabrics

• Passive smart fabrics

• Very smart fabrics

• Active smart fabrics

• Conductive Fabrics

Which of the following microcontrollers is specifically listed as a sewable component often used for e-textile applications?

• Arduino Uno

• ESP32 (with Bluetooth/Wi-Fi)

• Raspberry Pi

• Lilypad Arduino

Air permeability is typically expressed as the volume of air that flows through a known area of fabric under a specified pressure difference. What is a standard unit for reporting air permeability?

• Ohms per centimeter

• Grams per centimeter

• cm³/cm²/sec

• Newton (N)

What is the primary function of the Load Cell in the Instron TM-34 machine?

• To plot the stress-strain curve.

• To measure the change in length (extension)

• To control the testing software (Bluehill®/Merlin™)

• To measure the force applied to the specimen.

From the data plotted as a load–elongation curve by the Instron machine, which important mechanical property can be directly determined?

• Air Permeability

• Electrical resistance

• Breaking Load (or Tensile strength)

• Fabric GSM

The core objective of Experiment 5 is to create a basic LED circuit using which primary conductive component on a felt base?

• Flexible LED strips

• Conductive metal snap buttons

• Conductive thread (stainless steel or silver-coated)

• Electroluminescent (EL) wire

What is the most critical precaution to prevent a short circuit when stitching the components with conductive thread?

• Use a sharp needle suitable for conductive thread.

• Ensure the battery is a 3V coin cell (CR2032).

• Pull the stitches firmly but not too tight.

• Ensure the conductive thread stitches for positive and negative connections do not touch or cross each other.