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Civil Engineering QUESTION #2126

The hydraulic grade line (HGL) and energy grade line (EGL) in pipe flow are related such that:

HGL is always above EGL by the velocity head
EGL is always above or equal to HGL by the velocity head $\dfrac{V^2}{2g}$ — the vertical distance between EGL and HGL equals the velocity head at any cross-section✔️
HGL and EGL coincide for all flows
EGL slopes upward in the direction of flow while HGL slopes downward

Correct Answer Logic:

EGL represents total energy head $= \dfrac{p}{\rho g} + z + \dfrac{V^2}{2g}$. HGL represents piezometric head $= \dfrac{p}{\rho g} + z$. The difference is the velocity head: $EGL - HGL = \dfrac{V^2}{2g}$. Both slope downward in flow direction (energy loss). EGL is always above HGL (except at stagnation). When HGL falls below pipe centerline, pressure becomes sub-atmospheric — risk of cavitation and column separation.

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General Knowledge QUESTION #4646

Question 1202

Seven lamps: ceramic or wood base; red, brown, or yellow. More ceramic than wood. Red lamps are ceramic. No wood base is brown. Which sentence is NOT true?

Five lamps have a ceramic base✔️
Five lamps have brown shades
Five lamps have red shades
Four lamps have green shades

Correct Answer Logic:

3

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General Knowledge QUESTION #2613

Question 1203

What is the PRIMARY function of a CPU (Central Processing Unit)?

To store large amounts of data permanently like photos and documents
To convert electricity from the wall outlet into usable computer power
To process instructions and perform calculations that run programs and applications✔️
To connect peripheral devices like keyboards and mice to the computer

Correct Answer Logic:

The CPU (Central Processing Unit) is the brain of the computer. It processes instructions and performs calculations. Every action you take on a computer — opening a file, typing text — involves the CPU executing instructions.

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Physics and Math QUESTION #781

Question 1204

$\sinh^2 x + \cosh^2 x = ?$

$\cosh 2x$✔️
$\cosh x$
$\sinh 2x$
None

Correct Answer Logic:

Using hyperbolic identities: $\cosh^2 x + \sinh^2 x = \cosh 2x$.

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Urdu QUESTION #4462

Question 1205

درست جملہ بتائیں۔ (Identify the correct sentence)

وہ دن بدن پتلا ہوتا جا رہا ہے۔
وہ دان بدن میں پتلا ہوتا جا رہا ہے۔
وہ روز بروز پتلا ہو تا جا رہا ہے۔✔️
ان میں کوئی نہیں۔

Correct Answer Logic:

While 'din ba din' is common in speech, 'roz baroz' is considered the grammatically superior expression in formal Urdu for 'day by day'.

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Islamic Studies QUESTION #234

Question 1206

The basic obligatory action (Rukn) of Hajj is:

Sa'i
Rami
Wuqof-e-Arafah✔️
None of these

Correct Answer Logic:

Being present at the plain of Arafah is the essential core of the Hajj pilgrimage.

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Urdu QUESTION #5233

Question 1207

فوج کی جمع کیا ہے؟

فوج
افواج✔️
فوجیں
انجاج

Correct Answer Logic:

فوج کی جمع 'افواج' ہے۔ یہ عربی قاعدے کے مطابق جمع بنائی جاتی ہے۔

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Basic Mathematics QUESTION #4612

Question 1208

Solve: $\frac{2x + 4}{2} = 6$

$x = 4$✔️
$x = 8$
$x = 5$
$x = 10$

Correct Answer Logic:

$2x + 4 = 12 \Rightarrow 2x = 8 \Rightarrow x = 4$

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Mathematics QUESTION #1278

Question 1209

If a homomorphism $\varphi: G\to H$ is injective, then:

Every element of H has a preimage in G
$\ker\varphi$ is trivial (contains only identity)✔️
G and H have the same order
$\varphi$ must also be surjective

Correct Answer Logic:

An injective (one-to-one) homomorphism has trivial kernel: if $\varphi(g)=e_H$ then $\varphi(g)=\varphi(e_G)$, and by injectivity $g=e_G$. So $\ker\varphi=\{e_G\}$. This is both a necessary and sufficient condition for injectivity of a group homomorphism.

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Public Administration QUESTION #2926

Question 1210

In the 3-tier government structure of Pakistan, the lowest level is generally the:

Provincial Government
Federal Government
Local/District Government✔️
Division Office

Correct Answer Logic:

Local government represents the third tier, designed to bring administration and service delivery closer to the citizens.

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Womens Health [Obs] [Gyn] QUESTION #3923

Question 1211

A 28-year-old woman comes for a routine cervical screening test. She has no symptoms and her last test, three years ago, was normal. She is sexually active. What is the currently recommended screening test for her in a modern screening program (like Australia's)?

Human Papillomavirus (HPV) DNA testing✔️
Conventional Pap smear (cytology)
Liquid-based cytology (ThinPrep)
Colposcopy

Correct Answer Logic:

No explanation provided for this question.

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Biology QUESTION #529

Question 1212

Name the vertebrates which are without jaws.

Osteichthyes
Cyclostomata✔️
Chondrichthyes
None of these

Correct Answer Logic:

Cyclostomata (lampreys, hagfish) are jawless

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Physics QUESTION #1164

Question 1213

In which process is all the heat supplied converted into work done?

Isothermal✔️
Isochoric
Isobaric
Isentropic

Correct Answer Logic:

In a reversible isothermal process (constant temperature) for an ideal gas, the internal energy change $\Delta U = 0$ (since $U$ depends only on temperature). By the first law: $Q = \Delta U + W = W$. So all heat supplied is entirely converted to work done.

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Security Measures to Maintain Law and Order QUESTION #949

Question 1214

What is 'Cyber Security' in the context of airport order?

Locking the server room
Protecting digital systems and networks✔️
Fixing broken computers
Monitoring staff emails

Correct Answer Logic:

Protecting navigation, communication, and security systems from digital attacks is vital for maintaining airport order.

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Physics QUESTION #367

Question 1215

An electric charge in uniform motion produces:

An electric field
A magnetic field
Both magnetic and electric fields✔️
Neither magnetic nor electric fields

Correct Answer Logic:

A moving charge produces both electric and magnetic fields

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3196

Question 1216

'Tidal Volume' (TV) is defined as the volume of air:

Breathed in and out during a normal breath✔️
Remaining in lungs after forced expiration
Breathed in during maximal effort
The total capacity of the lungs

Correct Answer Logic:

Normal tidal volume is approximately $500\text{ ml}$.

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Agronomy QUESTION #2055

Question 1217

The permanent wilting point (PWP) of soil is the moisture content at which:

All gravitational water has drained from the soil macropores
Plants can no longer extract sufficient water from the soil and wilt permanently, corresponding to a soil matric potential of approximately $-1500$ kPa (or $-15$ bar)✔️
Soil moisture equals 50% of field capacity
Surface evaporation exceeds plant transpiration

Correct Answer Logic:

PWP is the soil moisture content at which the remaining water is held so tightly by soil particles (matric potential ≈ −1500 kPa) that roots cannot exert sufficient suction to extract it. Plants wilt permanently — they do not recover even when placed in a humid atmosphere. Plant-available water = FC − PWP.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3045

Question 1218

Which container is designed to be 'Tamper-evident'?

A clear glass bottle
A bottle with a seal that must be broken to open✔️
A paper bag
A plastic tub

Correct Answer Logic:

Tamper-evident packaging provides a visual indication if the product has been opened or altered.

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Biology QUESTION #4171

Question 1219

Which of the following base pairing maintains the constant diameter of the DNA double helix as per Watson and Crick's model?

Purine – Purine
Pyrimidine – Pyrimidine
Purine – Pyrimidine✔️
Sugar-Phosphate

Correct Answer Logic:

Purine-Pyrimidine pairing maintains constant diameter because purines are larger and pyrimidines are smaller, balancing the width.

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Biology QUESTION #4321

Question 1220

Olfactory receptors are the type of:

Photoreceptors
Mechanoreceptors
Thermoreceptors
Chemoreceptors✔️

Correct Answer Logic:

Olfactory receptors detect chemical stimuli (odor molecules) and are therefore classified as chemoreceptors. They are located in the nasal epithelium.

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