Explanation

• Ctrl + C in MS Word is used for the Copy command.

Additional information:

• Ctrl + R → Align text to the right
• Ctrl + E → Center align text
• Ctrl + J → Justify paragraph
• Ctrl + L → Align text to the left
• Ctrl + Q → Remove paragraph formatting (reset to default left alignment)

Last verified on 10-06-2026

Explanation

• Sayee is the act of walking or running seven times between the hills of Safa and Marwa in Makkah.
• It is a required ritual in Hajj and Umrah.

Additional information:

• Location: Masjid al-Haram, Makkah
• Performed after: Tawaf (circumambulation of Kaaba)
• Next ritual after Sayee: Hujjaj go to Mina
• Symbolism: Hajar’s search for water for her son, Prophet Ismael (PBUH)

Last verified on 15-03-2026

Explanation

• An antivirus software protects a computer against malware and viruses.
• It detects, blocks, and removes harmful software from a computer.
• Common threats include viruses, worms, Trojans, and spyware.
• Antivirus software helps protect files, programs, and system data.
• It can provide real-time protection against new threats.

Last verified on 12-08-2026

Explanation

17 m3/s = 17 x 1000 = 17000 litres/sec

Last verified on 17-10-2026

Explanation

• Sulphur dioxide (SO₂) is used as a dechlorinating agent to remove residual chlorine from water.
• It reacts with chlorine and reduces it to chloride ions, thereby neutralizing its disinfecting effect.
• Dechlorination is commonly required when excess chlorine must be removed from treated water or wastewater.

Last verified on 17-10-2026

Explanation

• Porosity: Soil porosity affects water storage and drainage.
• Fine-textured soils generally retain more water than coarse-textured soils.
• Capillary tension: It influences how strongly soil retains water against gravity after excess water has drained away.
• Field capacity (FC): It is the soil moisture content remaining after gravitational water has drained.
• It is usually about 1–3 days after thorough wetting, depending on the soil.

Last verified on 17-10-2026

Explanation

Formula:

Average Rainfall = Sum (Weight x Rainfall)

Given:

W1=0.10, P1=132

W2=0.16, P2=114

W3=0.12, P3=162

W4=0.11, P4=138

W5=0.09, P5=207

Calculation:

= (0.10 x 132) + (0.16 x 114) + (0.12 x 162) + (0.11 x 138) + (0.09 x 207)

= 13.20 + 18.24 + 19.44 + 15.18 + 18.63

= 84.69 mm

Last verified on 17-10-2026

Explanation

• In riveted joints, the gauge line indicates the line along which rivets are positioned.
• It helps determine the arrangement and spacing of rivets across the width of a plate.
• Gauge lines are important in designing riveted joints used in structural and mechanical applications.

Last verified on 17-10-2026

Explanation

• Thermophiles are heat-loving microorganisms that thrive at high temperatures.
• They commonly grow best within approximately 45–80°C, depending on the species.
• These organisms are found in hot springs, compost piles, and other hot environments.

Last verified on 17-10-2026

Explanation

• The moisture present in soil between field capacity (FC) and permanent wilting point (PWP) is called available water.
• Because plants can generally absorb this water for growth.

Additional information:

• Field Capacity (FC): The amount of water remaining in soil after excess gravitational water has drained away.
• Permanent Wilting Point (PWP): The soil moisture level at which plants can no longer absorb enough water and remain wilted.

Last verified on 17-10-2026