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Civil / Architecture QUESTION #2343

Bernoulli's equation for steady incompressible flow expressed as energy per unit weight (head) along a streamline is:

$\dfrac{p}{\rho} + \dfrac{V^2}{2} + gz = C$
$\dfrac{p}{\gamma} + \dfrac{V^2}{2g} + z = C$✔️
$p + \dfrac{1}{2}\rho V + \gamma z = C$
$\dfrac{p}{\gamma} + \dfrac{V}{2g} + z = C$

Correct Answer Logic:

Bernoulli's equation in head form: $\dfrac{p}{\gamma} + \dfrac{V^2}{2g} + z = C$, summing pressure head, velocity head, and elevation head. Option A is the energy-per-unit-mass form (divided by $g$). Option C has incorrect units. Option D incorrectly uses $V$ instead of $V^2$ in the velocity head term.

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Urdu QUESTION #1407

Question 2

اردو کی وہ کون سی کتاب ہے جس میں عربی فارسی کا ایک بھی لفظ شامل نہ ہو؟

مہر نیم روز
فسانۂ عجائب
پدماوت
رانی کیتکی کی کہانی✔️

Correct Answer Logic:

''رانی کیتکی کی کہانی'' منشی انشاء اللہ خاں انشا کی وہ مشہور تحریر ہے جس میں انہوں نے جان بوجھ کر صرف خالص ہندی (کھڑی بولی) کے الفاظ استعمال کیے اور عربی فارسی کا کوئی لفظ نہیں آنے دیا۔ یہ اردو نثر کا ایک منفرد تجربہ ہے۔

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Civil Engineering QUESTION #6582

Question 3

Pakistan's Review of IEE and EIA Regulations, 2000 specifies the listing of projects requiring IEE or EIA in:

Schedules I and II✔️
Schedules III and IV
Schedules V and VI
Schedule VII

Correct Answer Logic:

Under the Pakistan Environmental Protection Act (PEPA) 1997 and the 2000 Regulations, Schedules I and II list projects that require an Initial Environmental Examination (IEE) or Environmental Impact Assessment (EIA) respectively.

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Mathematics QUESTION #6022

Question 4

If the determinant $\begin{vmatrix}x-4&2x&2x\\2x&x-4&2x\\2x&2x&x-4\end{vmatrix} = (A+Bx)(x-A)^2$, find the ordered pair $(A,B)$.

$(-4,5)$✔️
$(4,5)$
$(-4,-5)$
$(-4,3)$

Correct Answer Logic:

Apply $R_1\to R_1+R_2+R_3$: each element in row 1 becomes $5x-4$.

Factor out $(5x-4)$: $\Delta = (5x-4)\begin{vmatrix}1&1&1\\2x&x-4&2x\\2x&2x&x-4\end{vmatrix}$

Apply $C_2-C_1, C_3-C_1$: $= (5x-4)\begin{vmatrix}1&0&0\\2x&-x-4&0\\2x&0&-x-4\end{vmatrix} = (5x-4)(x+4)^2$

Comparing with $(A+Bx)(x-A)^2$: $A=-4$, $B=5$. So $(A,B)=\mathbf{(-4,5)}$.

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English QUESTION #7544

Question 5

Choose the correct meaning of the word pair "Principal and Principle"

Principal = rule; Principle = head of school.
Principal = head of school; Principle = moral rule.✔️
Both mean the same.
Principal = student; Principle = money.

Correct Answer Logic:

Principal refers to the head of a school or a sum of money; "Principle" means a fundamental truth or moral rule.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3257

Question 6

'Active Hyperemia' refers to increased blood flow to an organ due to:

A blockage
Increased metabolic activity (like exercise)✔️
Gravity
Sleep

Correct Answer Logic:

Local metabolites cause vasodilation to bring more blood to working muscles.

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Pakistan Affairs QUESTION #146

Question 7

In 'The Loyal Mohammedans of India', how did Sir Syed describe Muslims who joined the rebellion?

As freedom fighters defending their rights
As misguided individuals seeking revenge
As criminals while condemning the general denunciation of Muslims as a race✔️
None of these

Correct Answer Logic:

Sir Syed defended the community by isolating the rebels as criminals rather than a racial trait.

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Islamic Studies QUESTION #630

Question 8

"Kitab-ul-Asar" is written by:

Imam Abu Hanifa✔️
Imam Malik
Imam Sha'afi
None of these

Correct Answer Logic:

This is a collection of Ahadith compiled by Imam Abu Hanifa.

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Civil Engineering QUESTION #2130

Question 9

The Biochemical Oxygen Demand (BOD) test measures:

The total dissolved oxygen concentration in a water sample
The amount of dissolved oxygen consumed by biological organisms in oxidizing organic matter in a water sample at 20°C over 5 days (BOD₅) — used as an indirect measure of organic pollution load in wastewater✔️
The chemical oxygen demand using potassium dichromate oxidation
The concentration of pathogenic bacteria in sewage effluent

Correct Answer Logic:

BOD₅ (standard 5-day, 20°C test) measures DO consumed by aerobic microorganisms decomposing carbonaceous organic matter in a diluted, incubated sample. It is the most widely used parameter for characterizing wastewater strength and assessing treatment plant performance. BOD₅ captures ~60–70% of ultimate BOD. Typical BOD₅ values: raw domestic sewage 200–300 mg/L; treated effluent <20 mg/L (secondary); <10 mg/L (tertiary).

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Chemistry QUESTION #7820

Question 10

Mass of 1 mole of calcium carbonate (CaCO₃) is:

50 g
75 g
100 g✔️
125 g

Correct Answer Logic:

Ca=40, C=12, O=16×3=48 → total 100 g/mol.

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Mathematics QUESTION #1287

Question 11

Which of the following sets forms a basis for $\mathbb{R}^3$?

{$(1,0,0),(0,1,0)$}
{$(1,2,3),(2,4,6),(0,0,1)$}
{$(1,0,0),(0,1,0),(0,0,1)$}✔️
{$(1,1,1),(2,2,2),(3,3,3)$}

Correct Answer Logic:

A basis for $\mathbb{R}^3$ must have exactly 3 linearly independent vectors. Option (A): only 2 vectors. Option (B): $(2,4,6)=2(1,2,3)$ — dependent. Option (C): the standard basis — 3 independent vectors ✓. Option (D): all three are scalar multiples of $(1,1,1)$ — dependent.

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Biology QUESTION #4293

Question 12

Which of the following best highlights the importance of proteins in immunity?

They act as receptors of pathogens
They are long term energy reserves
They act as antibodies
They act as mechanical barrier for pathogens✔️

Correct Answer Logic:

Proteins such as keratin in skin form mechanical barriers that physically prevent pathogens from entering the body, highlighting their protective structural role in immunity.

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Agronomy QUESTION #2088

Question 13

Soil health is conceptually distinct from soil fertility because:

Soil health refers only to chemical nutrient status while fertility includes biological indicators
Soil health encompasses the integrated capacity of soil to function as a living ecosystem — sustaining plant and animal productivity, maintaining or enhancing water and air quality, and promoting plant and animal health — including biological (microbial biomass, earthworms), physical (aggregate stability), and chemical (pH, CEC) dimensions✔️
Soil fertility is a broader concept than soil health
Soil health is measured only through crop yield response to fertilizer application

Correct Answer Logic:

Soil health (soil quality) is a holistic concept integrating biological, physical, and chemical soil functions. Soil fertility is a subset referring specifically to nutrient supply capacity. Key soil health indicators include: microbial biomass carbon, soil respiration, aggregate stability, infiltration rate, organic carbon content, earthworm populations, and compaction resistance — measured through the Soil Management Assessment Framework (SMAF) or Cornell CASH.

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Physical Education QUESTION #6812

Question 14

The concept of 'Naturalism' suggests that a child's physical development should:

Be forced through early specialization in one sport
Follow the natural stages of growth and maturation without artificial pressure✔️
Be ignored until the child reaches adulthood
Be secondary to learning classical languages

Correct Answer Logic:

Naturalism posits that education must be attuned to the child's developmental readiness and natural instincts.

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Education QUESTION #6769

Question 15

A teacher notices that a student's persistent academic failure is unrelated to motivation or teaching methods and suspects sensory or cognitive processing issues. Which type of educational decision, and what corresponding assessment tool, is MOST appropriate?

Grading decision; teacher-made achievement test
Diagnostic decision; specialized standardized diagnostic battery to identify root causes✔️
Placement decision; aptitude test
Selection decision; criterion-referenced test

Correct Answer Logic:

Diagnostic decisions address the causes of persistent learning difficulties — intellectual, physical, emotional, or environmental. When standard instructional remediation has failed, a diagnostic battery (not a routine achievement test) is needed to pinpoint the underlying cause. This is distinct from placement (where to put the student) or selection (whether to admit).

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Mathematics QUESTION #4090

Question 16

The dimension of the subspace $W$ of all $2\times2$ symmetric matrices (as a subspace of all $2\times2$ matrices) is:

$1$
$2$
$3$✔️
$4$

Correct Answer Logic:

A general $2\times2$ symmetric matrix is $\begin{pmatrix}a&b\\b&c\end{pmatrix}$ with 3 free parameters. A basis for $W$ is $\left\{\begin{pmatrix}1&0\\0&0\end{pmatrix},\begin{pmatrix}0&1\\1&0\end{pmatrix},\begin{pmatrix}0&0\\0&1\end{pmatrix}\right\}$. Hence $\dim(W)=3$.

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Egnlish QUESTION #719

Question 17

In "King Lear," who is the Earl of Gloucester's illegitimate son?

Edgar
Edmund✔️
Kent
Oswald

Correct Answer Logic:

Edmund is the antagonist who plots against his father and his legitimate brother, Edgar.

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General Knowledge QUESTION #7708

Question 18

Which two nations restored diplomatic ties in 2023 through Chinese mediation?

Israel and Iran
Saudi Arabia and Iran✔️
Turkiye and Armenia
None of these

Correct Answer Logic:

Saudi Arabia and Iran restored diplomatic relations in March 2023 through mediation by China. This historic agreement ended a seven-year diplomatic rift between the two regional powers and marked a significant shift in Middle Eastern geopolitics.

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General Knowledge QUESTION #4739

Question 19

The Nobel Peace Prize for 2006 was awarded to which person?

Dr. Mahathir Mohammad
Dr. Muhammad Yunus✔️
Dr. Abdul Kalam
Dr. Mohamed ElBaradei

Correct Answer Logic:

Dr. Muhammad Yunus of Bangladesh, along with the Grameen Bank he founded, was awarded the 2006 Nobel Peace Prize for their efforts to create economic and social development through microcredit.

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General Knowledge QUESTION #2639

Question 20

REIMAGING a computer involves:

Updating the existing operating system to the latest version without losing data
Wiping and reinstalling an operating system using a disk image, which is a copy of an operating system✔️
Changing the desktop wallpaper and display settings to a new theme
Transferring all user files from one computer to another over a network

Correct Answer Logic:

Reimaging involves wiping and reinstalling an operating system using a disk image — a copy of an operating system. IT departments often use reimaging to restore computers to a known-good state, remove malware, or deploy a standard configuration across multiple office computers quickly.

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