Question

_______ is used when ink is filled in a chinese ink pen.

• A. Pumping action
• B. Motor action
• C. Surface tension
• D. Gravity

Answer 1

The correct option is

(A) Pumping action

1. When the bladder is pressed and then released, a vacuum is created inside the bladder.
2. Since pressure outside the pen is more than inside the bladder, the ink is sucked into the bladder.