Explanation

Explanation

• Low-heat cement produces less heat of hydration.
• Dams are mass concrete structures, so heat control is important.
• It reduces the risk of thermal cracking.
• It develops strength more slowly than ordinary Portland cement.

Last updated: 15-08-2026 by NS 

Explanation

Explanation

• In a 1:5 cement mortar ratio, the first number represents cement.
• The second number 5, represents sand.
• So, 1 part cement: 5 parts sand.
• This ratio is commonly used in brick masonry and plastering, depending on specifications.

Last updated by NS on 14-8-2026

Explanation

• Granite is a strong and durable building stone.
• It has high compressive strength.
• It can withstand heavy loads from the bridge structure.
• It is resistant to weathering and abrasion.

Last updated by NS on 14-8-2026

Explanation

• Measured length = 250 m
• Standard chain length = 20 m
• Chain is 10 cm longer = 0.10 m
• Actual chain length = 20 + 0.10 = 20.10 m

Formula:

True Length=Measured Length×Actual Chain Length/Standard Chain Length​

Substitute:

=250×20.10/20

​ $$=250\times 1.005$$

=251.25 m

Last updated by NS on 14-8-2026
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Explanation

Use the formula: (a+b)^2=a^2 +2ab+b^2

(102)^2 =(100+2)^2

=10000+400+4

=10,404

Explanation

• A series of steps is called a staircase, stairway, or a flight of stairs

Additional information:

• Tread: The flat, horizontal top surface where you place your foot.
• Riser: The vertical part that forms the gap between one step and the next.
• Nosing: The front, rounded edge of the tread that sticks out over the riser

Last updated 14 August 2026 by NA

Explanation

• Egg-shaped sewer is suitable for a combined sewerage system.
• Combined sewers carry both sewage and storm water.
• The egg shape provides better velocity during low dry-weather flow.
• During heavy rainfall, it can carry large volumes of water.
• It helps reduce sediment deposition inside the sewer.

Last verified on 04-08-2026

Explanation

• Badshahi Masjid in Lahore is also called the Emperor's Mosque
• In 1947, it became a national symbol of Pakistan.
• Built by Emperor Aurangzeb in 1671–1673.
• Architect: Nawab Zain Yar Jang Bahadur
• Construction was completed in 1673.
• The 3rd-largest mosque
• Number of minarets: 8
• Height: 69 m

Last updated 25-07-2026 by NA