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For a simple gear train: $i_{13}=\left(-\frac{N_2}{N_1}\right)\left(-\frac{N_3}{N_2}\right)=-\frac{N_3}{N_1}$. The idler gear 2 cancels out in magnitude but reverses the direction sign once.

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Education QUESTION #1482

Question 3424

Which educational philosophy emphasizes teaching ideas that are everlasting and seeks enduring realities through great literature, art, philosophy, and religion?

Pragmatism
Perennialism✔️
Realism
Existentialism

Correct Answer Logic:

Perennialism focuses on teaching ideas that are everlasting and seeks enduring realities which are constant, found through great literature, art, philosophy, and religion. Key proponents include Robert Hutchins and Mortimer Adler.

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Chemistry QUESTION #1415

Question 3425

A reaction is exothermic if:

$\Delta H > 0$
$\Delta H < 0$✔️
$\Delta G > 0$
$\Delta G < 0$

Correct Answer Logic:

An exothermic reaction releases heat to the surroundings, meaning the enthalpy of the products is lower than that of the reactants. Therefore $\Delta H = H_{\text{products}} - H_{\text{reactants}} < 0$. A negative $\Delta H$ indicates an exothermic reaction. $\Delta G < 0$ indicates spontaneity, not necessarily exothermicity.

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Urdu QUESTION #5201

Question 3426

'خامہ بگوش' کس ادیب کا قلمی نام ہے؟

مظفر علی سید
مشفق خواجہ✔️
جمیل جالبی
حیدر علی آتش

Correct Answer Logic:

خامہ بگوش مشفق خواجہ کا قلمی نام ہے جس سے وہ کالم لکھتے تھے۔

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Islamic Studies QUESTION #216

Question 3427

Which event significantly contributed to the spread of Islam in the Peninsula?

Migration to Medina
Treaty of Hudaybiyyah
Conquest of Makka✔️
None of these

Correct Answer Logic:

The peaceful conquest of Makkah led to mass conversions across Arabia.

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Psychology QUESTION #1458

Question 3428

Which monocular cue is involved when objects that are farther away appear smaller in size?

Motion parallax
Linear perspective
Texture gradient
Relative size✔️

Correct Answer Logic:

Relative size is the monocular depth cue in which objects that are farther away appear smaller than closer objects of the same type. When we see two identical objects, we perceive the smaller one as farther away. This is distinct from linear perspective (parallel lines converging in the distance) and texture gradient (texture becomes finer with distance). Motion parallax involves objects appearing to move at different speeds based on distance.

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CISA QUESTION #1782

Question 3429

What is the most significant concern when deploying computer-assisted audit tools (CAATs)?

The technical capability of the software vendor
Potential costs, complexity of implementation, and security of the output✔️
The inability of automated tools to account for human behavioral factors
Documentary evidence being more reliable than automated results

Correct Answer Logic:

While CAATs can process data faster and more accurately than manual review, the primary concerns center on cost of acquisition and training, the complexity of proper deployment, and ensuring that the output is adequately secured and protected from unauthorized access or tampering.

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Others section QUESTION #4757

Question 3430

The Darfur conflict is primarily located in which country?

Somalia
Sudan✔️
Liberia
Chad

Correct Answer Logic:

The Darfur conflict began in 2003 in the Darfur region of western Sudan, resulting from tensions between African farmers and Arab nomads. It is considered one of the worst humanitarian crises.

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Mechanical Engineering QUESTION #2486

Question 3431

In the kinetostatics of a crank-slider mechanism, the force exerted by link $i$ on link $j$ is denoted $F_{ij}$. Newton's third law requires that:

$F_{ij} = F_{ji}$
$\mathbf{F}_{ij} = -\mathbf{F}_{ji}$ (equal magnitude, opposite direction)✔️
$|F_{ij}| = |F_{ji}|$ only when the links have equal mass
$F_{ij} + F_{ji} = m\mathbf{a}$

Correct Answer Logic:

By Newton's third law, the reaction forces between two links are equal in magnitude and opposite in direction: $\mathbf{F}_{ij}=-\mathbf{F}_{ji}$.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3490

Question 3432

'Digitalis purpurea' (Foxglove) contains glycosides used as:

Laxatives
Cardiotonics (Heart stimulants)✔️
Sedatives
Antiseptics

Correct Answer Logic:

Digitalis increases the force of heart contraction in heart failure.

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Economics QUESTION #1706

Question 3433

Despite numerous social protection programmes, Pakistan continues to face deep-rooted poverty. Which structural challenge has proven most intractable in the country's poverty reduction efforts?

Establishing equitable access to productive resources — land, credit, and education — across income groups✔️
Expanding the outreach and loan size of microfinance institutions
Narrowing persistent spatial disparities between rapidly growing urban centres and lagging rural areas
None of these

Correct Answer Logic:

The most fundamental and intractable challenge in Pakistan's poverty alleviation agenda has been ensuring equitable access to productive resources: highly skewed land distribution (top 1% own disproportionate land), limited access to formal credit for smallholders and women, and unequal quality of education across socioeconomic groups perpetuate intergenerational poverty. Microcredit and urban-rural parity are related but secondary policy levers.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3553

Question 3434

'Chalk' is an example of a crude drug from the:

Plant kingdom
Animal kingdom
Mineral kingdom✔️
Synthetic origin

Correct Answer Logic:

Mineral drugs include chalk, kaolin, and bentonite.

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Pharmacokinetics and Pharmacodynamics QUESTION #3850

Question 3435

What is the most reliable pharmacokinetic measurement to demonstrate bioequivalence between two tablet formulations containing the same drug dose?

Disintegration time
Dissolution time
Serum concentration✔️
Rate of excretion

Correct Answer Logic:

Bioequivalence is established by comparing pharmacokinetic parameters ($\text{AUC}$, $C_{\max}$, and $T_{\max}$) derived from serum concentration–time profiles after administration of both formulations.

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Physics QUESTION #4403

Question 3436

A ball is thrown into the air with velocity $v$ making angle $\theta$ with horizontal. If air resistance is neglected, at maximum height its velocity is:

Equal to initial velocity
Half of initial velocity
Equal to zero
Minimum but not zero✔️

Correct Answer Logic:

At maximum height, the vertical component of velocity $v_y = 0$. However, the horizontal component $v_x = v\cos\theta$ remains unchanged (no air resistance). So velocity is minimum but not zero (unless $\theta = 90°$).

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #2974

Question 3437

Clinical Pharmacy primarily focuses on:

Large-scale drug manufacturing
Patient-oriented medication therapy✔️
Agricultural drug development
Synthesis of new chemicals

Correct Answer Logic:

Clinical pharmacy shifts the focus from the product to the patient, ensuring rational and safe use of medication.

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Urdu QUESTION #5215

Question 3438

دنیا میں زبانوں کے کتنے بڑے خاندان ہیں؟

5
14✔️
3
8

Correct Answer Logic:

ماہرینِ لسانیات کے مطابق دنیا میں زبانوں کے تقریباً 14 بڑے خاندان ہیں۔

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Mathematics QUESTION #1262

Question 3439

Which of the following is the solution set of $x^2+x>2$?

($-\infty,-2)\cup(1,\infty)$✔️
($-2,1$)
($-\infty,-1)\cup(2,\infty)$
($-1,2$)

Correct Answer Logic:

Factor: $x^2+x-2>0\Rightarrow(x+2)(x-1)>0$. The product is positive when both factors are positive ($x>1$) or both negative ($x<-2$). Solution: $x\in(-\infty,-2)\cup(1,+\infty)$.

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Tourism & Hospitality Management QUESTION #1605

Question 3440

The Housekeeping Operations course covers 'green housekeeping' as a contemporary practice. Which of the following best describes its primary objective?

Painting hotel rooms in green colors to improve aesthetics
Implementing environmentally responsible cleaning practices that minimize chemical use, water consumption, waste, and energy in housekeeping operations✔️
Hiring staff from rural green areas to ensure cultural diversity
Managing the hotel's outdoor garden and landscaping

Correct Answer Logic:

Green housekeeping, covered in Module 3 of the Housekeeping Operations course under 'Cleaning Procedures,' refers to adopting eco-friendly, sustainable practices in housekeeping — including the use of biodegradable cleaning agents, reduced water and energy consumption, and waste minimization — aligned with broader sustainability goals in hotel operations.

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