Explanation

• The age of a tree is determined by its Rings (Number of Annual Rings).
• Each annual ring generally represents one year of growth.
• Counting the rings on the trunk helps determine the tree's age.
• The study of tree rings is called Dendrochronology.

Last verified on 20-07-2026

Explanation

Acute angles measure less than 90 degrees.

Additional information:

Right angles measure 90 degrees.

Obtuse angles measure more than 90 degrees.

Last verified on 13-03-2026

Explanation

Ultimate load is the maximum load a member can carry before failure.

It is used to design structures with a factor of safety for safety margins.

Explanation

Creep is the gradual increase in strain under a constant load over time.

Common in metals, concrete, and polymers under sustained stress.

Explanation

Centrifugal pumps are ideal for low-head, high-flow applications.

They efficiently move large volumes of water at moderate pressures.

Explanation

Laying pipes at least 75 cm deep protects them from surface loads and freezing.

Ensures durability and uninterrupted water supply.

Explanation

Curing for 7 days ensures proper hydration of cement in plaster.

It prevents cracks and improves strength and durability.

Explanation

Adding water to quick lime (CaO) produces slaked lime (Ca(OH)₂).

This process is called slaking and is exothermic.

Explanation

Grouting fills voids or cavities under concrete to restore support.

It is done under pressure to ensure proper compaction and stability.

Explanation

Water with pH < 6.5 is acidic and can harm plant growth.

Suitable irrigation water should have a pH between 6.5 and 8.5.