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Boilers Mechanical Engineering QUESTION #3994
Question 21
If an Inspector discovers a 'Structural Flaw' that makes a boiler dangerous, they are empowered to:
  • Give a verbal warning only
  • Immediately prohibit the use of the boilerโœ”๏ธ
  • Suggest a paint job
  • Wait until the next annual inspection
Correct Answer Logic:
Safety is the priority; the Inspector can issue an order to stop operation until repairs are certified.
Uploaded by: Fani Warraich
Paper-II (Pharmacology and Social Behaviour, Law & Ethics and Computer Sciences) QUESTION #5807
Question 22
The 'Late Adopters' (Laggards) represent approximately what percentage of the population?
  • 16%โœ”๏ธ
  • 34%
  • 2.5%
  • 13.5%
Correct Answer Logic:
Laggards or late adopters make up 16%[cite: 7].
Uploaded by: Fani Warraich
General Ability and Fire Fighting QUESTION #5599
Question 23
Why is water dangerous to use on a Class C fire?
  • It evaporates too quickly
  • It is electrically conductive and can cause shockโœ”๏ธ
  • It spreads the flames further
  • It reacts with electricity to create toxic gas
Correct Answer Logic:
Water is electrically conductive. Using it on live electrical equipment (Class C fire) creates a risk of electrocution to the firefighter.
Uploaded by: Fani Warraich
Mathematics QUESTION #1287
Question 24
Which of the following sets forms a basis for \(\mathbb{R}^3\)?
  • {\((1,0,0),(0,1,0)\)}
  • {\((1,2,3),(2,4,6),(0,0,1)\)}
  • {\((1,0,0),(0,1,0),(0,0,1)\)}โœ”๏ธ
  • {\((1,1,1),(2,2,2),(3,3,3)\)}
Correct Answer Logic:
A basis for \(\mathbb{R}^3\) must have exactly 3 linearly independent vectors. Option (A): only 2 vectors. Option (B): \((2,4,6)=2(1,2,3)\) โ€” dependent. Option (C): the standard basis โ€” 3 independent vectors โœ“. Option (D): all three are scalar multiples of \((1,1,1)\) โ€” dependent.
Uploaded by: Fani Warraich
Correct Answer Logic:
Closing Debtors = Opening Debtors + Credit Sales โ€“ Cash Received โ€“ Discount Allowed โ€“ Bad Debts = 12,000 + 55,000 โ€“ 45,000 โ€“ 3,000 โ€“ 1,500 = Rs. 17,500.
Uploaded by: Fani Warraich
Ability / HR / Governance / Special Education QUESTION #1807
Question 26
Rule 28(1) requires that bids be opened at a minimum of how many minutes after the deadline for submission of bids?
  • Fifteen minutes
  • Thirty minutesโœ”๏ธ
  • Forty-five minutes
  • Sixty minutes
Correct Answer Logic:
Rule 28(1) clearly states that bids shall be opened at the time specified in the bidding documents and shall be opened at least thirty minutes after the deadline for the submission of bids, to allow for any last-minute submissions to be received.
Uploaded by: Fani Warraich
Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3009
Question 27
Which of the following is a 'Flocculating Agent' used in suspensions?
  • Electrolytes
  • Surfactants
  • Polymers
  • All of theseโœ”๏ธ
Correct Answer Logic:
Electrolytes, surfactants, and polymers can all be used to form 'flocs' to improve suspension stability.
Uploaded by: Fani Warraich
Correct Answer Logic:

Let $Q=(4t, 2t^2)$ be a point on $x^2=8y$ (using parametrization $x=4t, y=2t^2$). $O=(0,0)$.

$P$ divides $OQ$ in ratio $1:3$: $P=\left(\frac{1\cdot4t+3\cdot0}{4},\frac{1\cdot2t^2+3\cdot0}{4}\right)=\left(t,\frac{t^2}{2}\right)$

Let $P=(h,k)$: $h=t$ and $k=\frac{t^2}{2}=\frac{h^2}{2}$

So $h^2=2k$, i.e., the locus is $x^2=2y$.

Uploaded by: Fani Warraich
General Knowledge QUESTION #8744
Question 29
Which discovery in 1928 brought a great revolution in medical history?
  • Vitamin C
  • Aspirin
  • Penicillinโœ”๏ธ
  • None above
Correct Answer Logic:
Alexander Fleming discovered penicillin in 1928.
Uploaded by: Fani Warraich
General Knowledge QUESTION #4705
Question 30
Which organization is considered the world's oldest international human rights body?
  • Amnesty International
  • Freedom House
  • Anti-Slavery Internationalโœ”๏ธ
  • Human Rights Watch
Correct Answer Logic:
Anti-Slavery International, founded in 1839, is the world's oldest international human rights organization, predating Amnesty International (1961) and Freedom House (1941).
Uploaded by: Fani Warraich
General Abilities QUESTION #4540
Question 31
What is $\frac{3}{4} + \frac{1}{4}$?
  • $\frac{4}{8}$
  • $1$
  • $\frac{4}{4}$
  • Both B and Cโœ”๏ธ
Correct Answer Logic:
$\frac{3}{4} + \frac{1}{4} = \frac{3+1}{4} = \frac{4}{4} = 1$. Both options B and C are correct.
Uploaded by: Fani Warraich
Chemistry QUESTION #7150
Question 32
Identify the amphoteric hydroxide among the following group 2 elements.
  • $Be(OH)_{2}$โœ”๏ธ
  • $Ca(OH)_{2}$
  • $Mg(OH)_{2}$
  • $Sr(OH)_{2}$
Correct Answer Logic:
Most group 2 hydroxides are basic and their basicity increases down the group. However, Beryllium ($Be$) is the first element and shows diagonal relationship with Aluminum. Due to its small size and high electronegativity, $Be(OH)_{2}$ is amphoteric, meaning it reacts with both acids and strong bases.
Uploaded by: Fani Warraich
Physics QUESTION #7868
Question 33

Speed of sound in ideal gas does NOT depend on:

  • Density
  • Moisture
  • Pressureโœ”๏ธ
  • Temperature
Correct Answer Logic:

For ideal gas, v = โˆš(ฮณRT/M). Pressure has no effect at constant temperature; moisture slightly affects density but the question says ideal gas: strictly, pressure independent.

Uploaded by: Fani Warraich
Nursing QUESTION #9214
Question 34
A researcher calculates Cronbach's Alpha (\(\alpha = 0.87\)) for a 20-item nursing satisfaction questionnaire. What does this indicate?
  • The tool has poor internal consistency and needs revision
  • The tool has excellent validity and measures what it intends to
  • The tool has good internal consistency reliabilityโœ”๏ธ
  • The tool is valid only for populations with similar cultural backgrounds
Correct Answer Logic:
Correct Answer: C โ€” Good internal consistency reliability

Cronbach's Alpha (\(\alpha\)) measures the internal consistency of a multi-item scale โ€” the degree to which items within the scale measure the same construct.

Interpretation benchmarks:
Cronbach's \(\alpha\)Internal Consistency
\(\alpha \geq 0.90\)Excellent
\(0.80 \leq \alpha < 0.90\)Good
\(0.70 \leq \alpha < 0.80\)Acceptable
\(0.60 \leq \alpha < 0.70\)Questionable
\(\alpha < 0.60\)Poor โ€” tool needs revision
\(\alpha = 0.87\) falls in the 'Good' range, meaning the 20 items are cohesively measuring the same concept. Cronbach's Alpha measures reliability, not validity โ€” a distinction critical for Head Nurse research appraisal.
Uploaded by: Fani Warraich
Mathematics QUESTION #6972
Question 35

Let $I_n=\displaystyle\int\tan^n x\,dx$ for $n>1$. If $I_4+I_6 = a\tan^5x + bx^5 + C$, find the ordered pair $(a,b)$.

  • $\left(-\dfrac{1}{5},1\right)$
  • $\left(\dfrac{1}{5},0\right)$โœ”๏ธ
  • $\left(\dfrac{1}{5},-1\right)$
  • $\left(-\dfrac{1}{5},0\right)$
Correct Answer Logic:

Use the reduction: $I_n+I_{n-2}=\displaystyle\int\tan^{n-2}x\cdot\tan^2x\,dx+\int\tan^{n-2}x\,dx=\int\tan^{n-2}x\sec^2x\,dx=\dfrac{\tan^{n-1}x}{n-1}+C$

$I_4+I_6$: set $n=5$: $I_4+I_6=\dfrac{\tan^5x}{5}+C$

Comparing with $a\tan^5x+bx^5+C$: $a=\dfrac{1}{5}$, $b=0$.

$(a,b) = \left(\dfrac{1}{5},0\right)$

Uploaded by: Fani Warraich
Reading and Writing (Module-1) QUESTION #5447
Question 36
Ming Tang's 2019 study explains Earth's arcs, ridges that form when an oceanic plate subducts under a continental plate, melts, rises, and bursts through the ____
  • continents geological
  • continents: geologicalโœ”๏ธ
  • continents: geological
  • continents. Geological
Correct Answer Logic:
A colon introduces an appositive or clarification; here it separates "continental crust" from "geological structures" though the original text has no punctuation. Given options, colon is least incorrect.
Uploaded by: Fani Warraich
Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3396
Question 37
The 'Optimal $pH$' for the stomach enzyme Pepsin is approximately:
  • $2.0$ (Acidic)โœ”๏ธ
  • $7.0$ (Neutral)
  • $8.5$ (Alkaline)
  • $14.0$ (Strongly Basic)
Correct Answer Logic:
Pepsin is highly active in the acidic environment of gastric juice.
Uploaded by: Fani Warraich
General Abilities QUESTION #4536
Question 38
Simplify: $\sqrt{18}$
  • $3\sqrt{2}$โœ”๏ธ
  • $2\sqrt{3}$
  • $9\sqrt{2}$
  • $6\sqrt{3}$
Correct Answer Logic:
$\sqrt{18} = \sqrt{9 \times 2} = \sqrt{9} \times \sqrt{2} = 3\sqrt{2}$
Uploaded by: Fani Warraich
Geography QUESTION #1246
Question 39
Convection currents are found in:
  • Troposphereโœ”๏ธ
  • Stratosphere
  • Ionosphere
  • None of these
Correct Answer Logic:
Convection currents in the atmosphere occur primarily in the troposphere โ€” the lowest layer of the atmosphere (0โ€“12 km). The troposphere is heated from below by the Earth's surface, making it thermally unstable and prone to convective overturning (warm air rises, cool air sinks). The stratosphere is thermally stable (temperature increases with altitude), suppressing convection.
Uploaded by: Fani Warraich
Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #2987
Question 40
How much $95\%$ alcohol is needed to prepare $500\text{ ml}$ of $70\%$ alcohol?
  • $368.4\text{ ml}$โœ”๏ธ
  • $350\text{ ml}$
  • $420.5\text{ ml}$
  • $300.0\text{ ml}$
Correct Answer Logic:
Using $C_1V_1 = C_2V_2$: $95 \times V_1 = 70 \times 500 \implies V_1 = 35000 / 95 \approx 368.4\text{ ml}$.
Uploaded by: Fani Warraich