When drying parts during a penetrant test, the parts

When drying parts during a penetrant test, the parts

• A. Are normally dried by a circulating hot-air dryer
• B. Are air-dried at room temperature
• C. Are dried with absorbent paper only
• D. Are dried by sun exposure

Answer: (C)

After the penetrant is removed from the surface, the part must be dried using clean, lint-free absorbent paper to blot away any remaining liquid. This method is preferred because it quickly and effectively removes moisture and penetrant without pushing material deeper into cracks, spreading the penetrant, or leaving fibers on the surface. Blotting with absorbent paper also minimizes introducing contaminants and provides a dry, clean surface for the developer to adhere to. Other drying methods are less reliable: hot-air drying can move or smear penetrant and may cause uneven drying; air-drying at room temperature can leave moisture; sun exposure is uncontrolled and can cause uneven drying or contamination.

After the penetrant is removed from the surface, the part must be dried using clean, lint-free absorbent paper to blot away any remaining liquid. This method is preferred because it quickly and effectively removes moisture and penetrant without pushing material deeper into cracks, spreading the penetrant, or leaving fibers on the surface. Blotting with absorbent paper also minimizes introducing contaminants and provides a dry, clean surface for the developer to adhere to.

Other drying methods are less reliable: hot-air drying can move or smear penetrant and may cause uneven drying; air-drying at room temperature can leave moisture; sun exposure is uncontrolled and can cause uneven drying or contamination.