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General Knowledge QUESTION #8735

Question 1

'Ornithology' is the scientific study of:

Animals
Reptiles
Sea Plants
Birds✔️

Correct Answer Logic:

Ornithology is the study of birds.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3102

Question 2

The average lifespan of a Red Blood Cell (Erythrocyte) is approximately:

10 days
30 days
120 days✔️
1 year

Correct Answer Logic:

RBCs circulate for about 120 days before being destroyed by the spleen and liver.

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Physics QUESTION #7307

Question 3

A stone falls freely from rest. The distance covered in the last second of motion equals the distance covered in the first 3 seconds. How long does the stone take to reach the ground?

5 s✔️
12 s
15 s
3 s

Correct Answer Logic:

Distance in first 3 s: $s_3 = \dfrac{1}{2}(10)(3)^2 = 45\text{ m}$

Distance in last 1 s of total time $T$ (using $s_n = u + \dfrac{a}{2}(2n-1)$ with $u=0$):

$s_{\text{last}} = \dfrac{g}{2}(2T-1) = 5(2T-1)$

Setting equal: $5(2T-1) = 45 \Rightarrow 2T-1 = 9 \Rightarrow T = \mathbf{5\text{ s}}$

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Constitutional Law QUESTION #5837

Question 4

Congress passes a law that prevents the Supreme Court from hearing any case that challenges the 'Don't Ask, Don't Tell' policy for the military. Is this law valid?

Yes, under the 'Exceptions and Regulations' clause of Article III.✔️
Yes, because it involves a 'political question' regarding military affairs.
No, because Congress cannot strip the court of jurisdiction over cases already in progress.
No, because it violates the due process rights of litigants to have a neutral forum.

Correct Answer Logic:

This is another application of the 'Exceptions Clause' (Article III, Section 2). Congress has broad authority to limit the appellate jurisdiction of the Supreme Court, though it cannot use this power to violate other constitutional provisions (like the Bill of Rights).

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English QUESTION #4451

Question 5

Which of the following sentences is CORRECT?

Payments can be made by cheque or in money
We need a nice and quiet place for a picnic.✔️
We stopped by a large wood to admire the nature.
None of these

Correct Answer Logic:

Option B is perfectly natural English. A should be 'in cash', and C should not have 'the' before 'nature'.

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Bio-Technology QUESTION #10600

Question 6

Bioremediation using sulfate-reducing bacteria (SRB) in anaerobic conditions achieves heavy metal removal by:

Oxidising heavy metals to less soluble higher oxidation states
Generating $H_2S$ that precipitates heavy metals as insoluble metal sulfides✔️
Accumulating heavy metals intracellularly via active transport
Producing exopolysaccharides that complex and immobilise metals

Correct Answer Logic:

Sulfate-reducing bacteria (e.g. Desulfovibrio) reduce $SO_4^{2-}$ to $H_2S$ under anaerobic conditions: $SO_4^{2-} + 8H^+ + 8e^- \rightarrow H_2S + 2H_2O + 2OH^-$. The generated $H_2S$ reacts with dissolved heavy metals (e.g. $Cd^{2+}$, $Zn^{2+}$, $Pb^{2+}$, $Cu^{2+}$) to form insoluble metal sulfide precipitates: $M^{2+} + H_2S \rightarrow MS \downarrow + 2H^+$. This is exploited in passive bioremediation of acid mine drainage.

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General Knowledge QUESTION #8661

Question 7

The Suez Canal connects which two seas?

Red Sea and Black Sea
Mediterranean Sea and Red Sea✔️
Dead Sea and White Sea
Atlantic Ocean with Pacific Ocean

Correct Answer Logic:

The Suez Canal connects the Mediterranean and Red Seas.

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MCQs Section QUESTION #5299

Question 8

'شہید کی جو موت ہے وہ قوم کی حیات ہے' یہ شعر کس کا ہے؟

عبدالمجید سالک
مولانا ظفر علی خان✔️
مولانا محمد علی جوہر
علامہ اقبال

Correct Answer Logic:

یہ مشہور شعر مولانا ظفر علی خان کا ہے جو پاکستان کے ادبی و سیاسی خدمت گزار تھے۔

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Reading and Writing (Module-1) QUESTION #5366

Question 9

Julia Alvarez's 1994 novel In the Time of the Butterflies, a fictionalized account of the lives of the Mirabal ______ can serve as a starting point for those wanting to explore how the rule of dictator Rafael Trujillo has been represented in Dominican American literature. Which choice completes the text so that it conforms to the conventions of Standard English?

sisters, and
sisters and
sisters,✔️
sisters

Correct Answer Logic:

A comma is needed after 'sisters' to close the appositive phrase that began after 'Butterflies.'

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Physics and Math QUESTION #768

Question 10

The solution of $1 + \cos x = 0$ is:

$\pi + 2k\pi,\ k \in \mathbb{Z}$✔️
$\pi - 2k\pi$
$2k\pi$
None

Correct Answer Logic:

$1 + \cos x = 0 \Rightarrow \cos x = -1 \Rightarrow x = \pi + 2k\pi,\ k \in \mathbb{Z}$.

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Boilers Mechanical Engineering QUESTION #2388

Question 11

The standard second-order closed-loop transfer function is written as:

$Y(s) = \frac{2\zeta\omega_n}{s^2+2\zeta\omega_n s+\omega_n^2}$
$Y(s) = \frac{\omega_n^2}{s^2+2\zeta\omega_n s+\omega_n^2}$✔️
$Y(s) = \frac{\omega_n^2}{s^2+\omega_n^2}$
$Y(s) = \frac{1}{s^2+2\zeta s+1}$

Correct Answer Logic:

The standard second-order system: $Y(s)=\frac{\omega_n^2}{s^2+2\zeta\omega_n s+\omega_n^2}$ where $\omega_n$ is the undamped natural frequency and $\zeta$ is the damping ratio. Poles: $s=-\zeta\omega_n\pm\omega_n\sqrt{\zeta^2-1}$.

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Physics QUESTION #7845

Question 12

Reverse-biased PN junction reverse current is of order:

Gigaamperes
Kiloamperes
Megaamperes
Microamperes✔️

Correct Answer Logic:

Reverse saturation current is very small (μA range for Si).

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Boilers Mechanical Engineering QUESTION #4000

Question 13

A 'Steam Trap' is a device that:

Catches steam for later use
Automatically discharges condensate and air without letting steam escape✔️
Filters out soot from steam
Turns steam into water

Correct Answer Logic:

Steam traps are vital for keeping steam lines efficient and preventing water hammer.

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Physics QUESTION #1164

Question 14

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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Islamic Studies QUESTION #7919

Question 15

Who are the angels appointed to question the deads in their graves?

Munkir and Nakeer (AS)✔️
Hazrat Jahraiel (AS)
Hazrat Iiraeel (AS)
Hazrat Kikaet (M)

Correct Answer Logic:

Munkar and Nakir are the two angels who question the deceased in their graves. They ask three questions: (1) Who is your Lord? (2) What is your religion? (3) Who is your Prophet? This questioning is part of the trial in the grave (Barzakh), and believers answer correctly while disbelievers fail.

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General Knowledge QUESTION #8940

Question 16

'Blue House' (Cheong Wa Dae) is the official residence of which leader?

Prime Minister of Britain
Chancellor of Germany
Pope of Vatican
President of South Korea✔️

Correct Answer Logic:

The Blue House is the South Korean presidential residence.

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General Knowledge QUESTION #4745

Question 17

What is the official name of Bangladesh's parliament?

People's National Assembly
Majlis-e-Shoora
Jatiya Sangsad✔️
Lok Sabha

Correct Answer Logic:

The Jatiya Sangsad (meaning National Assembly in Bengali) is the unicameral legislature of Bangladesh, located in Dhaka.

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Nursing QUESTION #9140

Question 18

A primigravida at 41+3 weeks is admitted for post-term pregnancy management. Bishop score is 4. CTG is reactive. Amniotic fluid index (AFI) is 6 cm. What is the MOST appropriate next step?

Discharge home with daily kick counts only
Emergency cesarean section due to post-term status
Cervical ripening with prostaglandins followed by induction of labor✔️
Conservative management until 42 weeks with twice-weekly NST

Correct Answer Logic:

Post-term Pregnancy Management ($\geq 42$ weeks; post-dates $\geq 41$ weeks):

This patient:

41+3 weeks = post-dates (risk period begins)
Bishop score 4 = unfavorable cervix (score $\leq 6$)
AFI 6 cm = borderline oligohydramnios (normal: $8{-}24\,\text{cm}$; oligohydramnios: $\leq 5\,\text{cm}$)
Reactive CTG = reassuring currently

Risks of post-term pregnancy:

Placental insufficiency, meconium aspiration
Macrosomia, shoulder dystocia
Oligohydramnios, cord compression
Perinatal mortality increases after 41 weeks

Management: Most guidelines recommend induction of labor by 41–42 weeks. With unfavorable cervix (Bishop score 4), cervical ripening first (Prostaglandin E₂ gel/insert or misoprostol) then oxytocin induction.

AFI trending down is additional reason not to wait further. Conservative management is inappropriate here.

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Boilers Mechanical Engineering QUESTION #2504

Question 19

The octahedral shear stress theory (von Mises criterion) for yielding states that yielding begins when:

$\sigma_{vm} = \sqrt{\sigma_1^2 + \sigma_2^2 + \sigma_3^2} \geq S_y$
$\sigma_{vm} = \sigma_1 - \sigma_3 \geq S_y$
$\sigma_{vm} = \frac{1}{\sqrt{2}}\sqrt{(\sigma_1-\sigma_2)^2+(\sigma_2-\sigma_3)^2+(\sigma_3-\sigma_1)^2} \geq S_y$✔️
$\sigma_{vm} = \frac{\sigma_1+\sigma_2+\sigma_3}{3} \geq S_y$

Correct Answer Logic:

The von Mises (distortion energy) criterion: $\sigma_{vm}=\frac{1}{\sqrt{2}}\sqrt{(\sigma_1-\sigma_2)^2+(\sigma_2-\sigma_3)^2+(\sigma_3-\sigma_1)^2}\geq S_y$.

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MCQs Section QUESTION #4880

Question 20

Which word is similar to "DEMISE"

Conclude
End
Affection
Death✔️

Correct Answer Logic:

Demise means a person's death or the end or failure of something. Death is its most direct synonym.

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