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MBBS QUESTION #10237

Using the Fick principle for cardiac output, $CO = \dfrac{VO_2}{(CaO_2 - CvO_2)}$, a patient has an oxygen consumption of 250 mL/min, an arterial oxygen content of 20 mL/dL, and a mixed venous oxygen content of 15 mL/dL. What is the calculated cardiac output?

2.5 L/min
5 L/min✔️
10 L/min
50 L/min

Correct Answer Logic:

The arteriovenous oxygen difference is $20 - 15 = 5\ \text{mL/dL} = 0.05\ \text{mL/mL}$. $CO = \dfrac{250\ \text{mL/min}}{0.05} = 5000\ \text{mL/min} = 5\ \text{L/min}$ — a normal resting cardiac output, illustrating how the Fick method is used clinically (e.g., during cardiac catheterization) to measure CO.

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General Knowledge QUESTION #11547

Question 9122

Which technology allows individuals with limited physical hand mobility to input text into computers?

Video conferencing
Speech Recognition✔️
Audio digitizer
Synthesizer

Correct Answer Logic:

Speech recognition software (Dragon NaturallySpeaking, Windows Speech Recognition, Siri) converts spoken words into text and computer commands, enabling hands-free computer operation. It is an essential assistive technology for people with mobility impairments, repetitive strain injuries, or other conditions preventing conventional keyboard/mouse use.

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General Knowledge QUESTION #4482

Question 9123

Who authored the seminal book “World Order”?

Fareed Zakaria
Henry Kissinger✔️
Andrew Heywood
None of these

Correct Answer Logic:

Henry Kissinger authored 'World Order'.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3398

Question 9124

Deficiency of 'Vitamin C' (Ascorbic Acid) leads to:

Night blindness
Rickets
Scurvy✔️
Beri-beri

Correct Answer Logic:

Scurvy involves bleeding gums and poor wound healing due to impaired collagen synthesis.

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Reading and Writing (Module-1) QUESTION #10403

Question 9125

The engineer's ------- design minimized waste, using every scrap of material with remarkable efficiency.

wasteful
economical✔️
extravagant
haphazard

Correct Answer Logic:

Minimizing waste with efficient use of material describes an 'economical' design.

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Islamic Studies QUESTION #7908

Question 9126

The Muslims conquered Mecca in:

620 A.D
625 A.D
630 A.D✔️
635 A.D

Correct Answer Logic:

The Muslims conquered Mecca in 630 CE (8 AH). This conquest occurred peacefully with minimal bloodshed. The Prophet (PBUH) entered Mecca with 10,000 companions, destroyed the idols in the Kaaba, and granted general amnesty to the Meccans, demonstrating Islam's message of forgiveness and mercy.

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Chemistry QUESTION #1423

Question 9127

In solvent extraction, the distribution coefficient is:

Ratio of solute concentration in two phases✔️
Ratio of solvents used
Ratio of extractant to sample volume
None of these

Correct Answer Logic:

The distribution coefficient (partition coefficient) $K_D$ in solvent extraction is defined as: $K_D = \dfrac{[\text{solute}]_{\text{organic}}}{[\text{solute}]_{\text{aqueous}}}$ — the ratio of the concentration of solute in the organic (extracting) phase to its concentration in the aqueous phase at equilibrium. A high $K_D$ means preferential distribution into the organic phase.

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Nursing QUESTION #9227

Question 9128

In a patient with Acute Respiratory Distress Syndrome (ARDS), what is the PRIMARY ventilation strategy supported by the ARDSNet trial?

High tidal volume ventilation at $10-12 \text{ mL/kg}$ IBW to ensure adequate oxygenation
Low tidal volume ventilation at $6 \text{ mL/kg}$ IBW with plateau pressure $\leq 30 \text{ cmH}_2\text{O}$✔️
Pressure control ventilation with PEEP set at $20 \text{ cmH}_2\text{O}$
Synchronized intermittent mandatory ventilation (SIMV) with pressure support of $15 \text{ cmH}_2\text{O}$

Correct Answer Logic:

Correct Answer: B — Lung-protective ventilation (ARDSNet Protocol)

The landmark ARDSNet trial (2000) demonstrated a 22% reduction in mortality using low tidal volume ventilation.

ARDSNet Lung-Protective Ventilation Strategy:

Parameter	Target
Tidal Volume ($V_T$)	$6 \text{ mL/kg}$ IBW (can range $4-8 \text{ mL/kg}$)
Plateau Pressure	$\leq 30 \text{ cmH}_2\text{O}$
PEEP	Titrated based on FiO$_2$/PEEP table
SpO$_2$ target	$88 - 95\%$
pH	$\geq 7.30$ (permissive hypercapnia allowed)

Rationale: High $V_T$ causes volutrauma and barotrauma — key mechanisms of VILI. Low $V_T$ limits overdistension while accepting mild hypercapnia (permissive hypercapnia).

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Boilers Mechanical Engineering QUESTION #2430

Question 9129

For external forced convection over a flat plate, the local Nusselt number in the laminar boundary layer region is given by:

$Nu_x = 0.332 \cdot Re_x^{1/2} \cdot Pr^{1/3}$✔️
$Nu_x = 0.023 \cdot Re_x^{0.8} \cdot Pr^{0.4}$
$Nu_x = Re_x \cdot Pr$
$Nu_x = 0.664 \cdot Re_x^{1/2} \cdot Pr^{1/3}$

Correct Answer Logic:

For laminar flow over a flat plate (local value): $Nu_x=0.332Re_x^{1/2}Pr^{1/3}$. Average over plate length $L$: $\overline{Nu}_L=0.664Re_L^{1/2}Pr^{1/3}$.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3041

Question 9130

'Pyrogens' are:

Chemical preservatives
Fever-producing substances from bacteria✔️
Types of viruses
Coloring agents

Correct Answer Logic:

Pyrogens are metabolic products of microorganisms that cause a rise in body temperature if injected.

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MCQs Section QUESTION #4852

Question 9131

Choose the word nearly opposite in meaning to "CAPTIOUS"

Tolerant✔️
Capable
Winning
Recollected

Correct Answer Logic:

Captious means tending to find fault or raise petty objections. Its antonym is 'tolerant,' meaning willing to accept views and behavior different from one's own without criticism.

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Administration QUESTION #2911

Question 9132

What term describes the integration of private-sector business methodologies into the management of public services?

Public Administration
Public Management✔️
New Public Service
New Public Management

Correct Answer Logic:

Public Management focuses on the efficiency and effectiveness of government operations by adopting business-like practices.

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Economics QUESTION #1717

Question 9133

The Enhanced Partnership with Pakistan Act of 2009 — commonly known as the Kerry-Lugar-Berman (KLB) Act — was a major US civilian assistance legislation that allocated USD 7.5 billion over five years primarily for which stated developmental purpose?

Strengthening Pakistan's military capacity and counterterrorism infrastructure
Financing civilian infrastructure and social sector development — particularly energy, education, and governance✔️
Expanding Pakistan's export-oriented manufacturing base and trade facilitation capacity
None of these

Correct Answer Logic:

The Kerry-Lugar-Berman Act (Enhanced Partnership with Pakistan Act, 2009) authorised USD 1.5 billion annually for five years in non-military civilian assistance to Pakistan. Its stated objectives were to support Pakistan's democratic governance, civilian institutions, and socioeconomic development — with specific focus on energy infrastructure (to address the power crisis), education (school construction and teacher training), and economic growth. It explicitly conditioned aid on civilian oversight of the military.

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Geology QUESTION #10649

Question 9134

Groove casts, flute casts, and tool marks — which are palaeocurrent indicators — are found on the _________ surface of a sedimentary bed.

Bottom (sole)✔️
Top
Within the bed (internal)
All surfaces equally

Correct Answer Logic:

Sole marks (including groove casts, flute casts, and tool marks) are found on the bottom (sole) surface of turbidite and other clastic beds. They form as moulds preserved in the overlying bed when: (1) currents scour the seafloor (flutes, grooves) or (2) objects dragged by currents incise the substrate (tool marks). Being moulds rather than originals, they are preserved as positive relief on the base of the overlying sandstone bed.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3372

Question 9135

'Opsonization' is the process where:

Bacteria are killed by heat
Pathogens are coated with antibodies/complement to enhance phagocytosis✔️
Viruses enter a cell
DNA is copied

Correct Answer Logic:

It makes the 'prey' (pathogens) easier for the 'predators' (WBCs) to catch.

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English Literature QUESTION #695

Question 9136

Which of these is a hallmark of "Post-Modernist" literature?

Linear narrative
Metafiction✔️
Objective truth
None of these

Correct Answer Logic:

Post-modernism often uses metafiction (writing about writing) to question the nature of reality and narrative.

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Math Physics Chemistry Biology QUESTION #4290

Question 9137

Self-fertilization in plants through successive generations can lead to the development of:

Hybrid breeds of plants
Variations in coming generation
True breeding plants✔️
Adaptation with their environment

Correct Answer Logic:

Continuous self-fertilization leads to increasing homozygosity. True breeding plants are homozygous and produce offspring identical to the parent generation.

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General Science and Ability QUESTION #199

Question 9138

Who is known as the inventor of Artificial Intelligence?

Charles Babbage
John McCarthy✔️
Alan Turing
None of these

Correct Answer Logic:

John McCarthy coined the term "Artificial Intelligence" in 1956.

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Agriculture Economics QUESTION #11892

Question 9139

A vertical (perfectly inelastic, $E_d = 0$) demand curve implies that quantity demanded:

Is infinitely responsive to price changes
Does not change at all regardless of price✔️
Falls to zero at any positive price
Rises without limit as price falls

Correct Answer Logic:

Perfectly inelastic demand ($E_d = 0$) means quantity demanded stays fixed no matter how price changes.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3580

Question 9140

Which branch of Pharmacognosy deals with the history, commerce, selection, and preservation of crude drugs?

Ethnobotany
General Pharmacognosy✔️
Phytochemistry
Zoology

Correct Answer Logic:

General Pharmacognosy covers the broader aspects of crude drug management and history.

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Parameter	Target
Tidal Volume (\(V_T\))	\(6 \text{ mL/kg}\) IBW (can range \(4-8 \text{ mL/kg}\))
Plateau Pressure	\(\leq 30 \text{ cmH}_2\text{O}\)
PEEP	Titrated based on FiO\(_2\)/PEEP table
SpO\(_2\) target	\(88 - 95\%\)
pH	\(\geq 7.30\) (permissive hypercapnia allowed)

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