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Maths QUESTION #7975

Question 1

A rectangle has a length of 16 cm and a breadth of 3 cm. What is its area?

40 cm
40 cm
$19 \text{ cm}^2$
$48 \text{ cm}^2$✔️

Correct Answer Logic:

Area of rectangle $= l \times b = 16 \times 3 = 48 \text{ cm}^2$

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #2955

Question 2

Which part of the prescription contains the names and quantities of the prescribed ingredients?

Superscription
Inscription✔️
Subscription
Transcription

Correct Answer Logic:

The Inscription is the main body of the prescription containing the names and quantities of the drugs.

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Boilers Mechanical Engineering QUESTION #2444

Question 3

The transmissibility (TR) in vibration isolation represents:

Output force at support divided by static force
The ratio of force transmitted to the foundation to the applied excitation force: $TR = \sqrt{\frac{1+(2\zeta r)^2}{(1-r^2)^2+(2\zeta r)^2}}$ where $r=p/\omega_n$✔️
The ratio of damped to undamped amplitude
The ratio of kinetic to potential energy

Correct Answer Logic:

Transmissibility: $TR=F_{transmitted}/F_0=\sqrt{\frac{1+(2\zeta r)^2}{(1-r^2)^2+(2\zeta r)^2}}$. For effective isolation, TR < 1 requires $r > \sqrt{2}$.

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MBBS QUESTION #10346

Question 4

Gluconeogenesis must bypass the three essentially irreversible reactions of glycolysis. Which distinct enzymatic bypass circumvents the highly exergonic pyruvate kinase step of glycolysis?

Pyruvate carboxylase (converting pyruvate to oxaloacetate), followed by phosphoenolpyruvate carboxykinase (converting oxaloacetate to phosphoenolpyruvate)✔️
Fructose-1,6-bisphosphatase acting alone
Glucose-6-phosphatase acting alone
Phosphofructokinase-2 acting in reverse

Correct Answer Logic:

Because glycolytic pyruvate kinase catalyzes an essentially irreversible reaction, gluconeogenesis instead uses a two-step bypass: pyruvate carboxylase (in mitochondria, requiring biotin and ATP) converts pyruvate to oxaloacetate, and PEP carboxykinase then converts oxaloacetate to phosphoenolpyruvate, allowing the pathway to proceed in the gluconeogenic direction.

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Boilers Mechanical Engineering QUESTION #2445

Question 5

For the SDOF damped forced vibration $m\ddot{x}+c\dot{x}+kx=F_0\sin pt$, the steady-state response lags the excitation by phase angle $\phi$ where:

$\tan\phi = \frac{1-(p/\omega_n)^2}{2\zeta(p/\omega_n)}$
$\tan\phi = \frac{2\zeta(p/\omega_n)}{1-(p/\omega_n)^2}$✔️
$\tan\phi = \frac{p}{\omega_n}$
$\tan\phi = \frac{k}{cp}$

Correct Answer Logic:

The phase angle: $\phi=\arctan\frac{2\zeta(p/\omega_n)}{1-(p/\omega_n)^2}$. At resonance ($p=\omega_n$): $\phi=90°$ regardless of damping.

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Constitutional Law QUESTION #5823

Question 6

A state law provides that only U.S. citizens may work as public school teachers. A lawful permanent resident (non-citizen) is denied a job and sues. What is the likely result?

The law is unconstitutional because alienage is a suspect class requiring strict scrutiny.
The law is constitutional under the 'public function' exception to the strict scrutiny rule for alienage.✔️
The law is unconstitutional because it violates the Privileges or Immunities Clause of the 14th Amendment.
The law is constitutional because the state has a rational basis to ensure teachers are loyal citizens.

Correct Answer Logic:

While alienage classifications by states are generally subject to strict scrutiny, there is an exception for positions that are 'intimately related to the process of self-government.' This includes police officers, jurors, and public school teachers.

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General Knowledge QUESTION #2639

Question 7

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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General Knowledge QUESTION #8803

Question 8

The world's largest active volcano, Mauna Loa, is located in which country?

Hawaii (USA)✔️
Central Andes (Chile)
Mount Mayon (Philippines)
Java (Indonesia)

Correct Answer Logic:

Mauna Loa is in Hawaii.

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Boilers Mechanical Engineering QUESTION #2446

Question 9

In free vibrations with Coulomb (dry) damping, the amplitude of successive oscillation cycles decreases by a constant amount per half-cycle of:

$\Delta x = \mu m g / k = x_s$ per HALF-cycle (linear decay)✔️
$\Delta x = e^{-\zeta\omega_n T}$ (exponential decay)
The amplitude increases due to friction
The amplitude decreases only when velocity is negative

Correct Answer Logic:

With Coulomb damping, the amplitude decreases LINEARLY by $4x_s=4\mu mg/k$ per full cycle. This contrasts with viscous damping where the decay is exponential.

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Accounting & Finance QUESTION #6200

Question 10

Which of these is a typical 'Non-Cash Item' on an Income Statement?

Wages and Salaries
Interest Paid
Depreciation✔️
Utilities Expense

Correct Answer Logic:

Depreciation is an accounting allocation, not an actual cash outflow [cite: 19].

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Therapeutics and Patient Care QUESTION #3896

Question 11

Which medication listed should patients be specifically counselled to take with or immediately after food to optimise therapeutic benefit?

Isotretinoin✔️
Sertraline
Amoxicillin
Atorvastatin

Correct Answer Logic:

Isotretinoin is highly lipophilic and its bioavailability increases by up to $50\%$ when taken with a high-fat meal, making food intake essential for adequate absorption.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3387

Question 12

'Hemoglobin' is an example of a protein with a:

Primary structure only
Secondary structure only
Tertiary structure only
Quaternary structure✔️

Correct Answer Logic:

It consists of four polypeptide subunits ($2\alpha$ and $2\beta$).

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Statistics QUESTION #1997

Question 13

Using moments $\mu_1' = -0.35$, $\mu_2' = 2.09$ about $a = 16$, the variance $\mu_2$ (second central moment) of the distribution equals:

2.09
1.9675✔️
2.2125
1.7

Correct Answer Logic:

Variance $\mu_2 = \mu_2' - (\mu_1')^2 = 2.09 - (-0.35)^2 = 2.09 - 0.1225 = 1.9675$. The central moment is obtained by subtracting the squared first raw moment from the second raw moment.

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Boilers Mechanical Engineering QUESTION #2525

Question 14

Conservation of linear momentum applies to a system of particles when:

Kinetic energy is conserved
The net external force on the system is zero: $\sum\mathbf{F}_{ext}=0$✔️
All particles move with the same velocity
The system has no angular momentum

Correct Answer Logic:

Linear momentum of a system $\mathbf{G}=\sum m_i\mathbf{v}_i$ satisfies $\frac{d\mathbf{G}}{dt}=\sum\mathbf{F}_{ext}$. When $\sum\mathbf{F}_{ext}=0$, $\mathbf{G}$ is conserved.

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Islamic Studies QUESTION #8256

Question 15

Which year is called the year of sorrow (Aam-ul-Hazn)?

7th Nabvi✔️
8th Nabvi
9th Nabvi
10th Nabvi

Correct Answer Logic:

The 10th year of Prophethood (619 CE) is called Aam al-Huzn (Year of Sorrow), though the answer key indicates 7th Nabvi. During this year, the Prophet (PBUH) suffered two devastating losses: the death of his beloved wife Hazrat Khadijah (RA), who had been his greatest supporter and first believer, and the death of his uncle Abu Talib, who had protected him from Quraish persecution. These losses left the Prophet vulnerable to increased persecution from his enemies.

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Math Physics Chemistry Biology QUESTION #11306

Question 16

Sickle cell anemia is caused by the substitution of which amino acid in the beta chain of hemoglobin?

Valine
Glutamic acid✔️
Lysine
Alanine

Correct Answer Logic:

Sickle cell anemia is caused by the substitution of glutamic acid with valine.

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Physics QUESTION #1059

Question 17

The electric field in a plane EM wave is $E_z=60\cos(5x+1.5\times10^9t)\ \text{V/m}$. The corresponding magnetic field expression is:

$B_z=60\cos(5x+1.5\times10^9t)\ \text{T}$
$B_y=60\sin(5x+1.5\times10^9t)\ \text{T}$
$B_y=2\times10^{-7}\cos(5x+1.5\times10^9t)\ \text{T}$✔️
$B_x=2\times10^{-7}\cos(5x+1.5\times10^9t)\ \text{T}$

Correct Answer Logic:

Amplitude of B: $B_0=\frac{E_0}{c}=\frac{60}{3\times10^8}=2\times10^{-7}\ \text{T}$. Wave travels in $-x$ direction (since $5x+\omega t$). E is in z-direction, wave in $-x$: B must be in y-direction ($\hat{k}\times(-\hat{i})=\hat{j}$... checking: $\vec{E}\times\vec{B}\propto$ direction of propagation $=-\hat{x}$). So $B_y=2\times10^{-7}\cos(5x+1.5\times10^9t)\ \text{T}$.

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Library Sciences QUESTION #1572

Question 18

In serials management, a 'check-in' record serves which primary function?

Recording the cost of each serial subscription
Systematically tracking the receipt of each issue of a periodical to identify gaps, missing issues, or irregular publication✔️
Binding completed serial volumes
Providing access to serial articles through an index

Correct Answer Logic:

The check-in record (or kardex) is a serials control tool that tracks the arrival of each issue of a periodical subscription. It enables librarians to quickly identify missing or late issues, claim them from vendors, and maintain a complete run — critical for academic and special library serials management.

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MCQs Section QUESTION #5126

Question 19

وہ صنفِ سخن کیا ہے جس کے ہر بند میں دونوں مصرعے ہم قافیہ ہوں اور ہر دوسرے شعر میں قافیہ بدل جائے؟

مسدس
مثنوی✔️
مخمس
ان میں سے کوئی نہیں

Correct Answer Logic:

مثنوی وہ نظم ہے جس میں ہر شعر کے دونوں مصرعے ہم قافیہ ہوں اور ہر شعر میں قافیہ بدل جائے۔

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Boilers Mechanical Engineering QUESTION #2533

Question 20

A perfectly plastic impact ($e=0$) between two particles results in:

Maximum kinetic energy loss and the particles move together after impact✔️
No energy loss and elastic rebound
Partial rebound with kinetic energy conserved
Maximum kinetic energy with separation

Correct Answer Logic:

For $e=0$ (perfectly plastic impact), the relative velocity of separation is zero — the particles stick together and move as one body. This results in maximum kinetic energy loss, while linear momentum is still conserved.

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