Question

In rainy season dampness spreads on a wall, this happens due to

• A. upthrust
• B. capillary action
• C. surface tension
• D. All of these

Answer 1

The correct option is B

capillary action

Any contact to accumulated water during rainy season may cause moisture to spread by capillary action through the building materials. Also, water tends to rise through the texture of bricks if house bricks are placed on damp ground.