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Boilers Mechanical Engineering QUESTION #2504

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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Chemistry QUESTION #4346

Question 3342

Value of $R$ gas constant in $J\ mol^{-1}\ K^{-1}$ is:

8.314✔️
62.4
0.821
62400

Correct Answer Logic:

The universal gas constant $R = 8.314\ J\ mol^{-1}\ K^{-1}$. Other values: $R = 0.0821\ L\ atm\ mol^{-1}\ K^{-1}$ and $R = 62.4\ L\ mmHg\ mol^{-1}\ K^{-1}$.

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General Abilities QUESTION #2814

Question 3343

The average of five numbers is 42. If one number is 60, what is the average of the remaining four?

37.5✔️
38
38.5
39

Correct Answer Logic:

Sum of all five $= 42 \times 5 = 210$. Remaining sum $= 210 - 60 = 150$. Average of remaining four $= \dfrac{150}{4} = 37.5$.

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English QUESTION #8442

Question 3344

If you 'have a finger in the pie', you are _______ in something.

Involved✔️
Disinterested
Puzzled
None of these

Correct Answer Logic:

'Have a finger in the pie' means to be involved in something.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3637

Question 3345

A 'Carminative' is a drug that:

Relieves flatulence (gas) from the GI tract✔️
Cures cancer
Reduces fever
Causes vomiting

Correct Answer Logic:

Fennel, Cardamom, and Ginger are classic carminatives.

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General Science and Ability QUESTION #256

Question 3346

Which contains a greater number of carbon atoms in one mole?

Chloroform
Methanol
Water
Ethanol✔️

Correct Answer Logic:

Ethanol (C2H5OH) has 2 carbon atoms per molecule, more than Chloroform (CHCl3) or Methanol (CH3OH).+1

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3407

Question 3347

The 'Citric Acid Cycle' (Krebs Cycle) produces the majority of high-energy molecules in the:

Cytoplasm
Mitochondrial Matrix✔️
Cell membrane
Lysosome

Correct Answer Logic:

It generates $NADH$ and $FADH_2$ for the electron transport chain.

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General Knowledge QUESTION #2623

Question 3348

What is the function of a HEATSINK in a computer?

To store temporary data for quick access by the CPU
To connect the CPU to the RAM through a dedicated data channel
To dissipate (remove) heat from the CPU to prevent it from overheating✔️
To manage the flow of electrical power from the power supply to all components

Correct Answer Logic:

A heatsink is used to dissipate heat from our CPU. The CPU generates significant heat during operation. The heatsink draws this heat away from the CPU and disperses it into the surrounding air, often aided by a cooling fan, to prevent damage from overheating.

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Academic/Professional (Social Sciences) QUESTION #6506

Question 3349

The 'Power Elite' is a concept developed by:

Max Weber
C. Wright Mills✔️
Vilfredo Pareto
Robert Michels

Correct Answer Logic:

Mills described a small group of military, corporate, and political leaders who dominate American policy.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3002

Question 3350

In an 'Oil-in-Water' (O/W) emulsion, the 'Oil' is the:

Continuous phase
Dispersed phase✔️
Emulsifying agent
Solvent

Correct Answer Logic:

In O/W, oil droplets are dispersed throughout the water (continuous phase).

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Math (Module-1) QUESTION #5380

Question 3351

A linear function $f$ is represented in the accompanying graph, where $y = f(x)$. What is the $y$-intercept of this function's graph?

$(0, 0)$
$(0, -\frac{16}{11})$
$(0, -8)$
$(0, 8)$✔️

Correct Answer Logic:

The $y$-intercept is the point where the line crosses the vertical $y$-axis. Observing the graph, the line crosses at $y = 8$.

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Chemistry QUESTION #468

Question 3352

Which of the following is pale yellow to reddish yellow in color?

Pb?O
PbO?
PbO✔️
2PbCO?.Pb(OH)?

Correct Answer Logic:

PbO (litharge) is pale yellow to reddish yellow

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Chemistry QUESTION #5582

Question 3353

In a reaction sequence, sodium phenoxide reacts with $CO_2$ under pressure at 125°C (Kolbe–Schmitt reaction) to give B, which on acetylation with $Ac_2O$ gives C. What is the major product C?

Methyl salicylate (OH and $COOCH_3$ on ring)
Ortho-acetoxybenzoic acid ($OCOCH_3$ and $COOH$ ortho)✔️
Para-acetoxybenzoic acid ($OCOCH_3$ and $COOH$ para)
A compound with keto groups

Correct Answer Logic:

Kolbe–Schmitt reaction: Sodium phenoxide + $CO_2$ (125°C, 5 atm) → Sodium salicylate (2-hydroxybenzoate), acidified to give salicylic acid (B = 2-hydroxybenzoic acid). Acetylation of salicylic acid with $Ac_2O$ preferentially acetylates the –OH group → product C = 2-(acetyloxy)benzoic acid = aspirin (ortho-acetoxybenzoic acid).

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General Knowledge QUESTION #8855

Question 3354

One of the main objectives of the All-India Muslim League at its founding in 1906 was:

To be loyal to the British government✔️
To take active part in Indian politics
To be close to the Hindu community
Not to take sides with any Indian community

Correct Answer Logic:

The League initially sought British loyalty.

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Nursing QUESTION #9249

Question 3355

A Head Nurse assesses a mechanically ventilated patient for ventilator-associated pneumonia (VAP). Which COMBINATION of nursing interventions constitutes the evidence-based VAP Prevention Bundle?

Frequent suctioning, prone positioning, daily chest X-ray, prophylactic antibiotics
Head of bed elevation 30–45°, daily sedation vacation, oral decontamination with chlorhexidine, subglottic secretion suctioning, and DVT prophylaxis✔️
Hourly oral suctioning, continuous lateral rotation, nebulized antibiotics, gastric pH monitoring
Supine positioning, continuous ETT cuff pressure monitoring, prophylactic antifungals, daily bronchoalveolar lavage

Correct Answer Logic:

Correct Answer: B — VAP Prevention Bundle

Evidence-Based VAP Prevention Bundle (IHI):

Intervention	Rationale
Head of bed elevation $30 - 45°$	Reduces aspiration of gastric contents
Daily Sedation Vacation (SAT)	Reduces duration of mechanical ventilation
Oral care with Chlorhexidine 0.12%	Reduces oropharyngeal colonization
Subglottic secretion drainage	Removes pooled secretions above ETT cuff
DVT prophylaxis	Component of IHI ventilator bundle
PUD prophylaxis	H2 blockers or PPIs (component of bundle)

Additional measures: maintain ETT cuff pressure at $20 - 30 \text{ cmH}_2\text{O}$, avoid unnecessary ventilator circuit changes, hand hygiene.

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General Abilities QUESTION #2842

Question 3356

What is the difference between Compound Interest and Simple Interest on Rs. 10,000 at $5\%$ per annum for 2 years?

Rs. 20
Rs. 25✔️
Rs. 30
Rs. 50

Correct Answer Logic:

SI $= \dfrac{10000 \times 5 \times 2}{100} = 1000$. CI: Amount $= 10000 \times (1.05)^2 = 10000 \times 1.1025 = 11025$. CI $= 1025$. Difference $= 1025 - 1000 = Rs.\ 25$.

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General Knowledge QUESTION #9005

Question 3357

The largest island in the world (excluding Australia) is:

Australia
Japan
Greenland✔️
Indonesia

Correct Answer Logic:

Greenland is the largest island.

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MCQs Section QUESTION #4854

Question 3358

Choose the word nearly opposite in meaning to "PUTATIVE"

Powerful
Colonial
Undisputed✔️
Unremarkable

Correct Answer Logic:

Putative means generally considered or reputed to be something, though not necessarily proven. Its antonym is 'undisputed,' meaning accepted as true without question or doubt.

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Islamic Studies QUESTION #8201

Question 3359

How many Pillars does Islam have?

4
5✔️
6
7

Correct Answer Logic:

Islam has Five Pillars (Arkan al-Islam), which are the foundation of Muslim life: (1) Shahadah - Declaration of faith, (2) Salah - Five daily prayers, (3) Zakat - Obligatory charity, (4) Sawm - Fasting during Ramadan, and (5) Hajj - Pilgrimage to Makkah for those who are able. These pillars unite Muslims worldwide in belief and practice.

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General Knowledge QUESTION #4681

Question 3360

Dan Quayle held which of the following positions?

Mexican footballer
American Politician✔️
Prime Minister of Brazil
Secretary General of NATO

Correct Answer Logic:

Dan Quayle served as the 44th Vice President of the United States under President George H.W. Bush (1989–1993).

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Intervention	Rationale
Head of bed elevation \(30 - 45°\)	Reduces aspiration of gastric contents
Daily Sedation Vacation (SAT)	Reduces duration of mechanical ventilation
Oral care with Chlorhexidine 0.12%	Reduces oropharyngeal colonization
Subglottic secretion drainage	Removes pooled secretions above ETT cuff
DVT prophylaxis	Component of IHI ventilator bundle
PUD prophylaxis	H2 blockers or PPIs (component of bundle)