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Boilers Mechanical Engineering QUESTION #2540
Question 1601
The parallel-axis (Steiner) theorem gives the second moment of area about an axis parallel to the centroidal axis as:
  • \(I=\bar{I}-Ad^2\)
  • \(I=\bar{I}\cdot d^2\)
  • \(I=\bar{I}+Ad^2\)โœ”๏ธ
  • \(I=\frac{\bar{I}}{Ad^2}\)
Correct Answer Logic:
Steiner's theorem: \(I=\bar{I}+Ad^2\), where \(\bar{I}\) is the centroidal second moment, \(A\) is the area, and \(d\) is the perpendicular distance between the axes. The second moment always increases for axes away from the centroid.
Uploaded by: Fani Warraich
HR and Management QUESTION #6466
Question 1602

The text's emphasis on 'most of these elements will affect you at some point in your career' suggests HRM knowledge is:

  • Only relevant for HR specialists
  • Universally applicable to all professionalsโœ”๏ธ
  • Required only for senior executives
  • Optional for technical professionals
Correct Answer Logic:

HRM knowledge is universally applicable - whether you work in HRM or not, whether you work with organizations or have people working for you, you will be dealing with people and affected by HR practices. It's essential knowledge for all professionals.

Uploaded by: Fani Warraich
Islamic Studies QUESTION #330
Question 1603
What was the original name of the host of the Prophet (๏ทบ), Abu Ayub Ansari (RA)?
  • Zaid bin Thabit
  • Khalid bin Zaidโœ”๏ธ
  • Qais bin Saad
  • Hanzla bin Aamir
Correct Answer Logic:
His original name was Khalid bin Zaid bin Kulayb.
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MCQs Section QUESTION #4850
Question 1604
Choose the word nearly similar in meaning to "CAJUN"
  • French-Canadian descendantโœ”๏ธ
  • American Indian
  • Native of the Everglades
  • Early inhabitant of the Bahama Islands
Correct Answer Logic:
Cajun refers to a member of a group of people in Louisiana descended from French-speaking Acadian immigrants who were expelled from Canada in the 18th century.
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Correct Answer Logic:
Substitute $x = 2$ into the function: $f(2) = 14 + 11(2) = 14 + 22 = 36$.
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Chemistry QUESTION #4352
Question 1606
Majority of reactions taking place at ordinary temperatures with $-\Delta H$ are:
  • Endothermic
  • Exothermicโœ”๏ธ
  • Thermally unstable
  • Reversible
Correct Answer Logic:
Reactions with $-\Delta H$ (negative enthalpy change) release heat to the surroundings and are exothermic. Most spontaneous reactions at ordinary temperature are exothermic.
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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3502
Question 1607
'Catechu' (Katha) is primarily used in medicine as a/an:
  • Astringentโœ”๏ธ
  • Antibiotic
  • Vitamin
  • Hormone
Correct Answer Logic:
Astringents cause contraction of tissues and are used for diarrhea and skin ulcers.
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Physics QUESTION #1033
Question 1608
A model states flux through electron orbit in magnetic field \(B\) is \(n(h/e)\). The magnetic moment in the lowest energy state (\(n=1\)) is:
  • \(\dfrac{heB}{\pi m}\)
  • \(\dfrac{heB}{2\pi m}\)โœ”๏ธ
  • \(\dfrac{he}{\pi m}\)
  • \(\dfrac{he}{2\pi m}\)
Correct Answer Logic:
Flux: \(B\pi r^2 = \frac{nh}{e}\Rightarrow r^2 = \frac{nh}{\pi eB}\). For \(n=1\): \(r=\sqrt{\frac{h}{\pi eB}}\). \(mv^2/r = evB\Rightarrow v = \frac{eBr}{m}\). Magnetic moment \(\mu = iA = \frac{ev}{2\pi r}\cdot\pi r^2 = \frac{evr}{2} = \frac{e}{2}\cdot\frac{eBr^2}{m} = \frac{e^2Bh}{2\pi em} = \frac{heB}{2\pi m}\).
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Boilers Mechanical Engineering QUESTION #2542
Question 1609
For a block of weight \(W\) on a horizontal surface with \(\mu_s=0.35\), the minimum horizontal force to initiate sliding is:
  • \(P_{\min}=0.35\,W\)โœ”๏ธ
  • \(P_{\min}=W/0.35\)
  • \(P_{\min}=0.35\,W^2\)
  • Cannot be determined without contact area
Correct Answer Logic:
At impending slip, friction reaches its limit: \(F_{\max}=\mu_s N=\mu_s W=0.35W\). Hence the applied force must equal \(P=0.35W\). Note that friction force is independent of contact area (Amontons' law).
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General Knowledge QUESTION #4485
Question 1610
_____ will co-host the next COP-31.
  • Indonesia and Turkey
  • Australia and Turkeyโœ”๏ธ
  • Turkey and Thailand
  • None of these
Correct Answer Logic:
COP31 is planned to be jointly hosted by Australia and Turkey.
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General Knowledge QUESTION #9006
Question 1611
The ability to know the thoughts of others without communication is called:
  • Telepathyโœ”๏ธ
  • Psychology
  • Telecommunication
  • Psychiatry
Correct Answer Logic:
Telepathy is the supposed ability to read minds.
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Dairy Food Science and Technology QUESTION #5909
Question 1612
Detection of starch adulteration in milk involves adding iodine solution. A positive test gives:
  • A red/pink coloration due to casein-iodine complex
  • A deep blue-black coloration due to amylose-\(\text{I}_2\) complex formationโœ”๏ธ
  • A yellow precipitate due to starch hydrolysis
  • No color change; starch is detected by microscopy only
Correct Answer Logic:
Iodine solution (Lugol's iodine or dilute \(\text{I}_2/\text{KI}\)) reacts with the helical structure of amylose to form an amylose-iodine inclusion complex producing an intense blue-black color. This is a qualitative test for starch adulteration in milk.
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General Knowledge QUESTION #4743
Question 1613
Hugo Chรกvez was the President of which country?
  • Venezuelaโœ”๏ธ
  • Brazil
  • Bolivia
  • Cuba
Correct Answer Logic:
Hugo Chรกvez served as President of Venezuela from 1999 until his death in 2013. He was known for his socialist Bolivarian Revolution policies.
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General Knowledge QUESTION #8812
Question 1614
Which glands in the human body secrete tears?
  • Pituitary glands
  • Adrenal glands
  • Lachrymal glandsโœ”๏ธ
  • Salivary glands
Correct Answer Logic:
Lachrymal glands produce tears.
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Pakistan Affairs QUESTION #595
Question 1615
Quaid-i-Azam M. A. Jinnah breathed his last in:
  • Quetta
  • Lahore
  • Karachiโœ”๏ธ
  • None of These
Correct Answer Logic:
The Quaid passed away in Karachi on September 11, 1948.
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Correct Answer Logic:
Density \(\rho = \frac{m}{\pi r^2 l}\). \(\frac{\Delta\rho}{\rho} = \frac{\Delta m}{m} + 2\frac{\Delta r}{r} + \frac{\Delta l}{l} = \frac{0.003}{0.60}+2\times\frac{0.01}{0.50}+\frac{0.05}{10.00} = 0.005+0.04+0.005 = 0.05 = 5\%\).
Uploaded by: Fani Warraich
Math Physics Chemistry Biology QUESTION #4278
Question 1617
The neurotransmitters are secreted by the neuron from:
  • Axon endsโœ”๏ธ
  • Dendrite end
  • Nissl's granules
  • Cell body
Correct Answer Logic:
Neurotransmitters are stored in synaptic vesicles at the axon terminals (synaptic knobs) and released into the synaptic cleft upon stimulation.
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Geography QUESTION #6298
Question 1618
Which sequence correctly represents the decreasing order of salinity in world ocean regions?
  • Red Sea > Mediterranean Sea > Persian Gulf > Atlantic Ocean
  • Persian Gulf > Red Sea > Mediterranean Sea > Pacific Oceanโœ”๏ธ
  • Mediterranean Sea > Red Sea > Atlantic Ocean > Indian Ocean
  • Red Sea > Persian Gulf > Mediterranean Sea > Indian Ocean
Correct Answer Logic:
The Persian Gulf has the highest salinity (~40 ppt) due to extreme evaporation and restricted circulation, followed by the Red Sea (~40 ppt), Mediterranean Sea (~38 ppt), and Pacific Ocean (~34 ppt). High evaporation rates and limited freshwater input drive these variations.
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Biology Zoology Botany QUESTION #1376
Question 1619
Which of the following is the dominant generation in the life cycle of Pteridophytes?
  • Sporophyteโœ”๏ธ
  • Gametophyte
  • Seedling
  • Embryo
Correct Answer Logic:
In pteridophytes (ferns and allies), the sporophyte generation (diploid, 2n) is the dominant, independent, and conspicuous phase โ€” the familiar leafy fern plant. The gametophyte (haploid, n) is a small, inconspicuous, short-lived prothallus. This contrasts with bryophytes where the gametophyte is dominant, and represents an evolutionary advancement.
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Dairy Food Science and Technology QUESTION #5870
Question 1620
In the Babcock test for fat determination, the acid used to digest protein and release fat is:
  • Acetic acid
  • Sulfuric acid \((\text{H}_2\text{SO}_4)\)โœ”๏ธ
  • Hydrochloric acid
  • Nitric acid
Correct Answer Logic:
Concentrated \(\text{H}_2\text{SO}_4\) is used in the Babcock test. It digests casein and other proteins, generates heat, and releases fat so it can be measured volumetrically in the Babcock bottle neck.
Uploaded by: Fani Warraich