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

• Wavelength is the distance between two successive crests or two successive troughs in a transverse wave.
• It represents one complete cycle of a wave.

Additional information:

• Symbol used: λ (Lambda)
• SI unit: meter (m)
• Wave formula: v = fλ
• Example wavelength values: 1 m, 0.5 m, 10 cm, 500 nm, 700 nm
• Visible light wavelength range: ~400 nm – 700 nm

Last verified on 12-03-2026

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.