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Rubber has a Poisson's ratio close to $0.5$ (nearly incompressible), which is the theoretical maximum for isotropic materials. Typical values: Rubber $\approx 0.45–0.50$, Steel $\approx 0.28$, Aluminum $\approx 0.33$, Copper $\approx 0.34$.

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General Knowledge QUESTION #4640

Question 7

Clorida is taller than Ivory. Emily is taller than Lovely. Lovely is taller than Enamol. To determine who among them is the tallest, which of the following further information, if any, is required?

Clorida is taller than Enamol and Lovely✔️
No further information is needed
Emily is taller Ivory
Clorida is taller than Lovely

Correct Answer Logic:

4

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HR and Management QUESTION #6472

Question 8

Human Resource Information System (HRIS) is primarily designed to:

Replace HR managers with automated systems
Provide an HR information base and implement employee communication systems✔️
Reduce headcount in HR departments
Eliminate paperwork entirely

Correct Answer Logic:

HRIS is designed to provide an HR information base and design/implement employee communication systems. It's a tool for better information management and communication, not a replacement for HR professionals.

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Civil / Architecture QUESTION #2353

Question 9

In LRFD design of steel tension members per AISC, the design strength for the fracture limit state (net section rupture) with $\phi_t = 0.75$ is:

$\phi_t P_n = 0.90 F_y A_g$
$\phi_t P_n = 0.75 F_u A_e$✔️
$\phi_t P_n = 0.85 F_y A_g$
$\phi_t P_n = 0.75 F_y A_e$

Correct Answer Logic:

For tension member fracture limit state: $\phi_t P_n = 0.75 F_u A_e$ where $F_u$ is the tensile strength, $A_e$ is the effective net area ($A_e = U \cdot A_n$, with $U$ being the shear lag factor), and $\phi_t = 0.75$. For yielding on the gross section: $\phi_t P_n = 0.90 F_y A_g$. The governing limit state is the lesser value.

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Physics and Math QUESTION #778

Question 10

$\left(\dfrac{1 - \sqrt{3}i}{2}\right)^4 = ?$

$\dfrac{-1 + \sqrt{3}i}{2}$✔️
$\dfrac{-1 - \sqrt{3}i}{2}$
$\left(\dfrac{-1 + \sqrt{3}i}{2}\right)^2$
None

Correct Answer Logic:

$\dfrac{1-\sqrt{3}i}{2}$ is a complex cube root of unity $\omega^2$, so $(\omega^2)^4 = \omega^8 = \omega^2 \cdot \omega^6 = \omega^2 = \dfrac{-1+\sqrt{3}i}{2}$.

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English QUESTION #496

Question 11

He was drenched with the hotness of his fear.

He was drenched with the hotness of his fear.
He was drenched in the hotness of his fear.✔️
He was drenched by the hotness of his fear.
He was drenched off the hotness of his fear.

Correct Answer Logic:

'Drenched in' is correct

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Reading and Writing (Module-1) QUESTION #5376

Question 12

While researching a topic, a student has taken the following notes: In astronomy, the mass of stars can be described in units called solar masses. One solar mass is roughly equal to the mass of the Sun. The mass of the star Proxima Centauri is 0.122 solar masses. The mass of the star Sirius A is 2.063 solar masses. The student wants to emphasize the mass of Sirius A. Which choice most effectively uses relevant information from the notes to accomplish this goal?

The mass of stars, like Proxima Centauri, can be described in units called solar masses.
In astronomy, the mass of stars can be described in units called solar masses, and one solar mass is roughly equal to the mass of the Sun.
The Sun is more massive than Proxima Centauri, which has a mass of 0.122 solar masses.
With a mass of 2.063 solar masses, Sirius A is more massive than the Sun.✔️

Correct Answer Logic:

Option D focuses on the specific mass of Sirius A as the primary point of the sentence.

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Boilers Mechanical Engineering QUESTION #2526

Question 13

A particle moves in a straight line with constant acceleration $a$. Starting from rest ($v_0=0$), the distance traveled in time $t$ is:

$s = at$
$s = \frac{1}{2}at^2$✔️
$s = \frac{at^2}{4}$
$s = 2at^2$

Correct Answer Logic:

For constant acceleration with $v_0=0$: integrating $a=\text{const}$ gives $v=at$, and integrating again gives $s=\frac{1}{2}at^2$.

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English QUESTION #2673

Question 14

Find the meaning of the idiom: 'Burn the midnight oil'

To light a lamp
To waste oil
To work or study late into the night✔️
To sleep early

Correct Answer Logic:

This phrase means to put in extra effort late at night.

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Physics QUESTION #7220

Question 15

Which of the following pairs does not have similar (same) dimensions?

Tension and surface tension✔️
Stress and pressure
Planck's constant and angular momentum
Angle and strain

Correct Answer Logic:

Checking each pair:

Tension: $[MLT^{-2}]$ (force). Surface tension: $[MT^{-2}]$ (force per length). These are different — this pair does NOT have the same dimensions.
Stress and Pressure: both $= [ML^{-1}T^{-2}]$ — same dimensions.
Planck's constant $[h] = [ML^2T^{-1}]$. Angular momentum $[L] = [ML^2T^{-1}]$ — same dimensions.
Angle and Strain: both are dimensionless ratios — same dimensions.

Tension $[MLT^{-2}]$ vs Surface tension $[MT^{-2}]$ — these differ by $[L]$, so this pair does NOT have similar dimensions.

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General Knowledge QUESTION #2628

Question 16

What does it mean when hardware is described as 'BACKWARD COMPATIBLE'?

Older hardware can only work with other older hardware of the same generation
Newer hardware works exclusively with only the newest components available
Older hardware works with newer hardware✔️
Hardware that has been returned to the manufacturer for refurbishment

Correct Answer Logic:

Backward compatible means older hardware works with newer hardware. For example, a USB 3.0 port is backward compatible with USB 2.0 devices — you can plug in an older USB 2.0 flash drive into a newer USB 3.0 port and it will still function.

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Paper-II (Pharmacology and Social Behaviour, Law & Ethics and Computer Sciences) QUESTION #5775

Question 17

Omeprazole heals peptic ulcers by blocking:

H2 Histamine Receptors
Muscarinic Receptors
The H+/K+ ATPase (Proton Pump)✔️
Prostaglandin Receptors

Correct Answer Logic:

PPIs like Omeprazole irreversibly block the gastric proton pump.

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Pakistan Affairs QUESTION #4663

Question 18

How many medals did Pakistan win at the 18th Commonwealth Games in Melbourne 2006?

3
5✔️
7
9

Correct Answer Logic:

Pakistan won 5 medals at the 2006 Commonwealth Games held in Melbourne, Australia.

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Law QUESTION #5657

Question 19

The principal court of original jurisdiction in civil cases is:

High Court
Court so designated by the Provincial Government by notification in the official gazette✔️
The Senior Civil Judge
The District and Session Judge

Correct Answer Logic:

The principal court of original civil jurisdiction is the court designated by the Provincial Government by notification in the official gazette — not the High Court or the District and Session Judge.

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General Knowledge QUESTION #7718

Question 20

The Abbasid Governor _____ came to Sindh in 140 AH / 757 AD.

Hisham✔️
Walid
Musa
None of these

Correct Answer Logic:

Hisham ibn Amr al-Taghlibi was appointed as the Abbasid governor of Sindh around 140 AH (757 AD). The Abbasid period saw administrative changes in Sindh following the earlier Umayyad conquest of the region.

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