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Boilers Mechanical Engineering QUESTION #2518

The principle of work and energy for a particle states that the net work done by all forces equals:

The change in potential energy only
The change in kinetic energy: $U_{1\to2}=\frac{1}{2}mv_2^2 - \frac{1}{2}mv_1^2$✔️
The impulse of the net force
The product of average force and displacement

Correct Answer Logic:

Work-energy theorem: $U_{1\to2}=T_2-T_1$, where $T=\frac{1}{2}mv^2$ is kinetic energy. This is derived by integrating Newton's second law along the path.

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Pakistan Affairs QUESTION #598

Question 5942

Pakistan became Member of the UN General Assembly in:

September 1947✔️
January 1948
September 1948
None of These

Correct Answer Logic:

Pakistan joined the United Nations on September 30, 1947.

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Civil Procedure QUESTION #3727

Question 5943

Two cars collide at an intersection. Witness A says Car 1 ran the red light. Witness B says Car 2 ran the red light. Both witnesses are credible. The jury is perfectly split $\text{50/50}$ on who was at fault. If the plaintiff (Driver of Car 1) has the burden of proof, who wins?

The plaintiff.
The defendant.✔️
Neither; it's a mistrial.
They share the damages equally.

Correct Answer Logic:

The plaintiff bears the burden of proof by a 'preponderance of the evidence' (more likely than not, or $>50\%$). If the evidence is in equipoise (exactly $50/50$), the party with the burden of proof loses.

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General Knowledge QUESTION #8734

Question 5944

Which part of the human body is primarily affected by the disease malaria?

Liver
Lungs
Intestine
Spleen✔️

Correct Answer Logic:

Malaria parasites affect the spleen and red blood cells.

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English Literature QUESTION #10738

Question 5945

Bilal has a very advanced sense of what is socially appropriate and always knows what to say in every social context. He has which kind of linguistic competence?

Phonemic
Semantic
Pragmatic✔️
Syntactic

Correct Answer Logic:

Pragmatic competence is the ability to use language appropriately in different social contexts — knowing what to say, how to say it, and when to say it. This includes understanding indirect speech acts, politeness conventions, implicature, and contextual appropriateness. Dell Hymes called this communicative competence. Chomsky's linguistic competence covers phonology, syntax, and semantics but not social appropriateness.

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Dairy Food Science and Technology QUESTION #5918

Question 5946

The MSNF (milk solids-not-fat) content of whole cow milk is approximately:

$3.5\%$
$8.5\text{–}9\%$✔️
$12\%$
$1.5\%$

Correct Answer Logic:

MSNF includes all milk solids excluding fat: protein ($\approx 3.2\%$), lactose ($\approx 4.8\%$), minerals ($\approx 0.7\%$) and vitamins. Total MSNF $\approx 8.5\text{–}9\%$. Whole milk TS = fat ($\approx 3.5\text{–}4\%$) + MSNF ($\approx 8.5\text{–}9\%$) $\approx 12\text{–}13\%$.

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Pakistan Affairs QUESTION #4667

Question 5947

What is the largest source of electricity generation in Pakistan?

Thermal✔️
Hydel
Coal
Nuclear

Correct Answer Logic:

Thermal power plants (using natural gas, oil, and coal) have been the largest source of electricity generation in Pakistan, accounting for a majority of total generation capacity.

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Agronomy QUESTION #2084

Question 5948

A moldboard plow is agronomically superior to a disc plow for primary tillage in soils that are:

Sandy with low organic matter and prone to wind erosion
Heavy clay or loam soils with thick crop residues, where the moldboard's inversion action effectively buries residues, controls perennial weeds, and breaks compacted layers — though it increases erosion risk on sloping land✔️
Light sandy soils where minimal soil disturbance is needed
Waterlogged for extended periods requiring subsoil drainage

Correct Answer Logic:

The moldboard plow inverts the furrow slice completely (150–180° rotation), burying surface residues, weed seeds, and crop stubble effectively. It excels in heavy-textured soils with dense residues and perennial weeds. Its limitation is leaving bare soil exposed to erosion. Disc plows cut and partially invert soil, better suited to hard, dry, stony soils where moldboards would break.

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Chemistry QUESTION #5560

Question 5949

Which of the following compounds is NOT an antacid?

Aluminium hydroxide
Cimetidine
Phenelzine✔️
Ranitidine

Correct Answer Logic:

Antacids neutralize excess stomach acid. Aluminium hydroxide $Al(OH)_3$ is a classic antacid. Cimetidine and Ranitidine are $H_2$-receptor antagonists that reduce acid secretion — also classified as antacids. Phenelzine is a monoamine oxidase inhibitor (MAOI) used as an antidepressant, NOT an antacid.

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General Knowledge QUESTION #11482

Question 5950

Which MS Word feature monitors all revisions made to a document?

Edit Document
Monitor Change
Track Changes✔️
Track All

Correct Answer Logic:

Track Changes (Review tab → Track Changes, or Ctrl+Shift+E) records all modifications to a document — insertions, deletions, formatting changes, and comments — each shown in a different colour per editor. Reviewers can accept or reject individual changes, making it essential for collaborative editing.

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Reading and Writing (Module-1) QUESTION #10448

Question 5951

The diplomat's remarks were so ------- on every controversial topic that journalists left the press conference feeling utterly -------.

forthright . . informed
evasive . . uninformed✔️
candid . . enlightened
direct . . satisfied

Correct Answer Logic:

Vague, non-committal remarks ('evasive') leave journalists 'uninformed.'

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English QUESTION #8574

Question 5952

What does the idiom 'to lose face' mean?

To look blank
To look angry
To be helpless
To be humiliated✔️

Correct Answer Logic:

'Lose face' means to be embarrassed or humiliated.

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Dairy Food Science and Technology QUESTION #5955

Question 5953

Which of the following is NOT a function of water in ice cream?

Acts as solvent for sugar, minerals, and other water-soluble components
Participates in the freezing process forming ice crystals that contribute to texture ($40\text{–}70\%$ of water frozen at $-14^{\circ}\text{C}$)
Acts as an emulsifying agent for fat globules✔️
Determines the final ice crystal size distribution and texture of ice cream

Correct Answer Logic:

Water in ice cream dissolves sugars, proteins, and minerals, and freezes to form ice crystals ($40\text{–}70\%$ of water frozen at serving temperature $-14^{\circ}\text{C}$). Water does NOT act as an emulsifier — that function is performed by emulsifiers (lecithin, mono/diglycerides) and proteins.

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Maths QUESTION #4567

Question 5954

Simplify the ratio $12:18$:

$6:9$
$4:6$
$2:3$✔️
All of these

Correct Answer Logic:

Divide both by GCD $(12,18) = 6$: $\frac{12}{6}:\frac{18}{6} = 2:3$

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Math Physics Chemistry Biology QUESTION #578

Question 5955

Which of the following may build coral reefs along with coral animals?

Myxomycota
Brown algae
Green algae
Red algae✔️

Correct Answer Logic:

Red coralline algae help build reefs

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Accounting & Finance QUESTION #6186

Question 5956

According to the 'Rule of 72', how long will it take for money to double at a compound annual interest rate of $12\%$?

Approximately 6 years.✔️
Exactly 7.2 years.
Approximately 8 years.
12 years.

Correct Answer Logic:

$72 / 12 = 6$. The rule states time to double is $72 / r$ [cite: 60].

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Physics QUESTION #4387

Question 5957

For two equal positive charges, the electric field is weakest:

Midway between them✔️
Along the perpendicular bisector
Close to either charge
At infinity

Correct Answer Logic:

At the midpoint between two equal positive charges, the electric fields due to each charge are equal in magnitude but opposite in direction, so they cancel out. The resultant electric field is zero (weakest) at this point.

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Math Physics Chemistry Biology QUESTION #738

Question 5958

At what temperature the velocity of sound is doubled than as that of at 10°C:

859°C✔️
560°C
760°C
500°C

Correct Answer Logic:

v ∝ √T. For v to double: T2 = 4T1. T1 = 10+273 = 283K; T2 = 4x283 = 1132K = 859°C.

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MCQs Section QUESTION #5042

Question 5959

اردو شاعری کے علاوہ مرزا غالب نے کس صنفِ نثر میں نام پیدا کیا؟

آپ بیتی
خطوط✔️
داستان
ان میں سے کوئی نہیں

Correct Answer Logic:

مرزا غالب اردو خطوط نگاری کے بانی سمجھے جاتے ہیں۔ ان کے خطوط اردو نثر کا سرمایہ ہیں۔

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Psychology QUESTION #9804

Question 5960

Trait Theory has been criticized primarily on the grounds that:

Traits may be highly dependent on the situation
Moderator variables are often very influential
They often do not specify how traits are organized within the personality
All of the above✔️

Correct Answer Logic:

Trait Theory faces multiple criticisms: situational dependency (Mischel), influential moderator variables, and failure to explain how traits are organized internally. All three criticisms are widely recognized in personality psychology.

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