Explanation

• Cast iron pipes are strong and durable.
• They are mainly used for underground water-supply lines.
• They can withstand high water pressure.
• They have a long service life.
• They are suitable for large and permanent water-supply systems

Explanation

• Plain Sedimentation (4–8 hours): Relies purely on gravity for natural particle settling.
• Coagulation-Sedimentation (2–4 hours): Uses chemical coagulants to accelerate particle clumping and settling.
• Detention Time Formula: Calculated as (T =V/Q), dividing tank volume (V) by flow rate (Q) [KETOS].

Explanation

• Montague fall is a type of canal fall.
• It uses a parabolic glacis for energy dissipation.
• The parabolic shape helps control high-velocity flow.
• It converts excess energy and reduces scouring.
• It is used in irrigation canal systems.

Explanation

A fluid flow in which the velocity vector has the same magnitude and direction at every point at any given instant is known as a uniform flow.

Explanation

• F7 is the shortcut key used to check Spelling and Grammar in Microsoft Word.

Additional information:

Key Function Keys (F1–F12)

1. F1 – Opens Help
2. F2 – Rename selected file/folder (Windows) / Edit active cell (Excel)
3. F3 – Opens Search
4. F4 – Alt + F4 closes the active window
5. F5 – Refreshes browser / Starts Slide Show in PowerPoint
6. F6 – Moves to the next pane in Microsoft Word
7. F7 – Spelling & Grammar Check
8. F8 – Enables Extend Mode in Excel
9. F9 – Updates/Refreshes fields in Microsoft Word
10. F10 – Activates the Menu Bar
11. F11 – Full-screen mode in browsers
12. F12 – Save As in Microsoft Word

Last verified on 09-07-2026

Explanation

Autobiography: In the Line of Fire by Pervez Musharraf

Published: September 25, 2006

Additional information:

• Born: 11 August 1943, Delhi, British India
• Position: 10th President of Pakistan (2001–2008)

Explanation

• CTRL + H opens the "Find and Replace" dialog box.
• It allows you to replace text or specific formatting in MS Word 2007.

Additional information

• CTRL + I: Italicizes selected text.
• CTRL + T: Creates a hanging indent
• Ctrl + F: Opens the Find tab to search for text or formatting.
• Ctrl + G: Opens the Go To tab to navigate to a specific page or element.
• Ctrl + Shift + C: Copies selected text formatting.
• Ctrl + Shift + V: Pastes copied text formatting.

Explanation

• Ctrl + N shortcut key is used to create a new, blank document
• Save Document: Ctrl + SO
• Open Document: Ctrl + O
• Print Document: Ctrl + P (or Ctrl+F2 for Preview)
• Undo/Redo: Ctrl + Z (Undo),Ctrl + Y (Redo)
• Bold/Italic/Underline: Ctrl + B, Ctrl + I, Ctrl + U
• Center Alignment: Ctrl + E
• Insert Hyperlink: Ctrl + K
• Find/Replace: Ctrl + F (Find), Ctrl + H (Replace)

Last updated question by NA on 07 May 2026

Explanation

Given:

y=2x^2−13x+5

Differentiate:

dy/dx​=4x−13

For slope $=-1$:

$$4x-13=-1$$ $$x=3$$

At $x=3$:

y=2(3)^2−13(3)+5=−16

So the point of contact is (3, −16).

The tangent equation:

$$y+16=-(x-3)$$

y=−x−13

Explanation

• Sir Syed Ahmad Khan wrote the book Khutbat-e-Ahmadiya.
• Published: 1870
• Purpose: A scientific and historical defense of the life of Prophet Muhammad (PBUH).