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Correct Answer Logic:
$R = (I \times 100) / (P \times T) = (100 \times 100) / (500 \times 4) = 10000 / 2000 = 5\%$.
Uploaded by: Fani Warraich
Dairy Food Science and Technology QUESTION #5975
Question 1242
In traditionally made Dahi (South Asian yoghurt), which starter culture is typically used?
  • Freeze-dried commercial starters of \(S.\;thermophilus\) and \(L.\;bulgaricus\)
  • Back-slopping (using \(1\text{–}2\%\) of previous day's dahi as inoculum) containing mixed LAB including \(L.\;delbrueckii\), \(S.\;thermophilus\), \(Lc.\;lactis\), and \(Leuconostoc\) spp.✔️
  • Pure culture of \(L.\;acidophilus\) only
  • Strains of \(Bifidobacterium\;longum\)
Correct Answer Logic:
Traditional dahi is prepared by back-slopping — adding \(1\text{–}2\%\) of previous day's dahi (jamun/culture) to heated and cooled milk. This maintains a complex naturally evolved microbiota including \(Lc.\;lactis\), \(L.\;delbrueckii\), \(S.\;thermophilus\), \(Leuconostoc\) spp. and yeasts.
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Journalism / Mass Communication QUESTION #6370
Question 1243
The halftone process, introduced in 1881, was a critical innovation for journalism. Which of the following BEST describes why it mattered?
  • It allowed newspapers to print in multiple colours for the first time
  • It made possible the accurate reproduction of photographs in books and newspapers, enabling news photography and photojournalism✔️
  • It was the first method of printing photographs on metallic surfaces
  • It allowed wireless transmission of images between cities before satellite technology
Correct Answer Logic:

Before the halftone process (introduced in 1881), photographs could not be directly reproduced in print media. Images in newspapers were limited to hand-drawn illustrations, woodcuts, and engravings. The halftone process converted continuous-tone photographs into a pattern of tiny dots of varying sizes, which could be printed alongside text using standard printing presses. This meant that for the first time, photographs could appear in newspapers and books, creating the conditions for photojournalism — the use of photographs to document news events and drive public opinion. Combined with improvements like dry plates, smaller portable cameras, and George Eastman's Kodak box camera (1888) with roll film, the halftone process transformed print journalism from a primarily word-based medium to a powerful visual medium, enabling photographic documentation of wars, social conditions, and major public events.

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English QUESTION #2782
Question 1244
What does the PHRASAL VERB 'PUT OFF' mean?
  • To place something outside
  • To cancel something permanently
  • To delay or postpone something✔️
  • To turn off a device
Correct Answer Logic:
'Put off' means to delay or postpone something to a later time. Example: 'She put off the meeting until next week.' It is different from 'cancel' because 'put off' means rescheduling, not eliminating.
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Urdu QUESTION #5127
Question 1245
درست محاورہ کون سا ہے: آبرو پر .... لگانا۔
  • بٹہ✔️
  • مٹی
  • برمتی
  • ان میں سے کوئی نہیں
Correct Answer Logic:
درست محاورہ ہے: 'آبرو پر بٹہ لگانا' یعنی کسی کی عزت و وقار کو نقصان پہنچانا۔
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Egnlish QUESTION #680
Question 1246
Who wrote the poem "The Waste Land"?
  • Ezra Pound
  • W.B. Yeats
  • T.S. Eliot✔️
  • Robert Frost
Correct Answer Logic:
This 1922 poem is considered one of the most important works of 20th-century Modernist poetry.
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Biology QUESTION #4181
Question 1247
Myelin sheath acts as;
  • Protector
  • Insulator✔️
  • Sensor
  • Supporter
Correct Answer Logic:
Myelin sheath insulates nerve fibers and speeds up nerve impulse transmission.
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Accounting & Finance QUESTION #1215
Question 1248
Internal check is carried on by:
  • Staff specially appointed for the purpose
  • Internal auditor
  • Supervisor of the staff
  • Members of the staff✔️
Correct Answer Logic:
Internal check is a system where the accounting and other operations of a business are so organized that the work of one member of staff is automatically checked by another member in the normal course of their duties. It is carried out by members of the staff themselves as part of their routine work — not by a separately appointed person.
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Information Technology QUESTION #1135
Question 1249
Which mechanism allows a device to inform the CPU that it is ready for data transfer?
  • Polling
  • Interrupt✔️
  • DMA
  • None of these
Correct Answer Logic:
An interrupt is a signal sent by hardware to the CPU to request immediate attention, allowing the CPU to perform other tasks until the device is ready.
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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3367
Question 1250
'Sepsis' is a life-threatening condition caused by:
  • The body's extreme response to an infection✔️
  • A lack of sleep
  • Eating too much sugar
  • A broken leg
Correct Answer Logic:
Sepsis can lead to organ failure and death.
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Correct Answer Logic:
No explanation provided for this question.
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Correct Answer Logic:
Total parts \(= 7 + 3 = 10\). Milk \(= \dfrac{7}{10} \times 60 = 42\) litres.
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Boilers Mechanical Engineering QUESTION #2433
Question 1253
For internal forced convection in a fully developed turbulent pipe flow (Dittus-Boelter equation), the Nusselt number is:
  • \(Nu_D = 0.332 Re_D^{0.8} Pr^{0.4}\)
  • \(Nu_D = 0.023 Re_D^{0.8} Pr^n\) where \(n=0.4\) for heating and \(n=0.3\) for cooling✔️
  • \(Nu_D = 3.66\) (constant, for laminar flow)
  • \(Nu_D = 0.664 Re_D^{1/2} Pr^{1/3}\)
Correct Answer Logic:
The Dittus-Boelter equation for turbulent pipe flow: \(Nu_D=0.023Re_D^{0.8}Pr^n\) with \(n=0.4\) for heating and \(n=0.3\) for cooling.
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Correct Answer Logic:
D-Fructose satisfies all conditions: (A) Found in honey — ✓. (B) Keto sugar (ketohexose) — ✓. (C) Exists in \(\alpha\) and \(\beta\)-anomeric forms (in cyclic pyranose/furanose forms) — ✓. (D) Laevorotatory (rotates plane of polarized light to left, hence the 'D' prefix refers to configuration, not optical rotation) — ✓. D-Glucose is dextrorotatory.
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Pakistan Affairs QUESTION #4667
Question 1255
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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Correct Answer Logic:
The Calvin cycle (dark reactions) requires 18 ATP and 12 NADPH to fix 6 molecules of $CO_2$ into one glucose molecule: $6CO_2 + 18ATP + 12NADPH \to C_6H_{12}O_6 + 18ADP + 12NADP^+$. Each turn of the cycle uses 3 ATP and 2 NADPH; 6 turns are needed for one glucose.
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Correct Answer Logic:

Step 1: Series groups to handle voltage

Each capacitor handles 300 V. For 1000 V: minimum capacitors in series = $\lceil 1000/300 \rceil = 4$ (since $3 \times 300 = 900 < 1000$, we need 4 in series).

4 capacitors in series gives capacitance $= \frac{1}{4}\ \mu\text{F}$ per row.

Step 2: Parallel rows to achieve 2 μF

Number of rows in parallel $= \frac{2}{1/4} = 8$ rows.

Total capacitors $= 4 \times 8 = \mathbf{32}$

Uploaded by: Fani Warraich
Correct Answer Logic:
ACI 318 specifies that for \(\#3\) through \(\#5\) bars, the minimum inside bend diameter for stirrup/tie hooks is \(4d_b\). For \(\#3\) bar, \(d_b = 0.375\,\text{in}\), so minimum inside diameter \(= 4 \times 0.75 = 3\,\text{in}\) (using outside diameter relation — per ACI Table 25.3.2, inside diameter \(= 4d_b = 1.5\,\text{in}\) — refer to applicable edition).
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Ability / HR / Governance / Special Education QUESTION #1907
Question 1259
Under Rule 2(1)(iv) the Cabinet means and consists of which of the following?
  • The President and the Prime Minister
  • The Prime Minister and the Federal Ministers✔️
  • All Federal Ministers including Ministers of State
  • The Prime Minister Federal Ministers and Advisers
Correct Answer Logic:
Rule 2(1)(iv) precisely defines Cabinet as the Prime Minister and the Federal Ministers — it does not include Ministers of State or Advisers.
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Accounting &amp; Finance QUESTION #6167
Question 1260
In Yield Curve Theory, what does an 'Abnormal' or downward-sloping curve typically suggest?
  • Investors expect inflation to rise
  • Long-term interest rates are higher than short-term rates
  • Short-term rates are higher than long-term rates✔️
  • The market is perfectly segmented
Correct Answer Logic:
Lesson 04 defines the Abnormal (Inverted) curve as the case where short-term rates are higher than long-term rates.
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