Reading Mode - Questions

The boiler is put in a bag
Localized overheating causes the metal to bulge outward due to internal pressure✔️
The boiler is painted
The operator makes a mistake

Correct Answer Logic:

This is often caused by oil or scale preventing heat transfer at that spot.

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CISA QUESTION #6821

Question 1670

During an audit, management presents a disaster recovery plan that was tested three years ago with successful results. The IT infrastructure has undergone significant changes since then including cloud migration and new applications. What is the auditor's PRIMARY concern?

Plan documentation needs updating
Plan effectiveness cannot be validated without recent testing reflecting current environment✔️
Test results are too old to be useful
Management commitment is questionable

Correct Answer Logic:

A DRP must be tested regularly and after significant changes. Successful testing three years ago provides no assurance that the plan works with the current infrastructure. Cloud migration and new applications represent material changes that could render the old plan ineffective. Current validity cannot be assumed.

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Urdu QUESTION #5261

Question 1671

'سیدالشہداء' قواعد کی رو سے کیا ہے؟

خطاب
خاص
لقب✔️
عرف

Correct Answer Logic:

سیدالشہداء ایک لقب ہے جو کسی خاص صفت یا شہادت کی وجہ سے دیا جاتا ہے۔

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Physics QUESTION #368

Question 1672

What is emitted by a hot metal filament in a cathode ray tube?

X-ray
Proton
Electron✔️
Photon

Correct Answer Logic:

Hot metal filaments emit electrons through thermionic emission

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Biology QUESTION #7261

Question 1673

Which one of the following pairs is wrongly matched?

Coliforms — Vinegar✔️
Methanogens — Gobar gas
Yeast — Ethanol
Streptomycetes — Antibiotic

Correct Answer Logic:

The wrongly matched pair is Coliforms — Vinegar. Vinegar (acetic acid) is produced by Acetobacter (acetic acid bacteria), not coliforms. Coliforms (e.g., E. coli) indicate fecal contamination of water. Methanogens produce methane (biogas/gobar gas); Yeast ferments sugar to ethanol; Streptomyces produces many antibiotics (e.g., streptomycin).

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3544

Question 1674

'Ergot' is a:

Mineral
Fungus that grows on rye plants✔️
Type of tree
Seaweed

Correct Answer Logic:

Claviceps purpurea is the fungus source of ergot alkaloids.

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General Abilities QUESTION #4559

Question 1675

Compare $1.83$ and $1.823$:

$1.83 > 1.823$✔️
$1.83 < 1.823$
$1.83 = 1.823$
Cannot compare

Correct Answer Logic:

Write as $1.830$ and $1.823$. Since $1830 > 1823$, we have $1.83 > 1.823$

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Verbal Reasoning QUESTION #8177

Question 1676

Let $n$ be a positive integer divisible by 6. Compare:

Quantity A: The remainder when $n$ is divided by 12

Quantity B: The remainder when $n$ is divided by 18

Quantity A is greater
Quantity B is greater
The two quantities are equal
The relationship cannot be determined from the information given✔️

Correct Answer Logic:

Since $n$ is divisible by 6, $n$ can be $6, 12, 18, 24, 30, 36, \ldots$

Example 1: $n = 12$. Remainder ÷12 $= 0$. Remainder ÷18 $= 12$. B > A.

Example 2: $n = 18$. Remainder ÷12 $= 6$. Remainder ÷18 $= 0$. A > B.

Example 3: $n = 36$. Remainder ÷12 $= 0$. Remainder ÷18 $= 0$. Equal.

The relationship changes, so it cannot be determined.

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Chemistry QUESTION #4343

Question 1677

Chlorination of benzene in the presence of iron(III) chloride involves mechanism of:

Electrophilic addition
Electrophilic Substitution✔️
Free radical Substitution
Free radical halogenation

Correct Answer Logic:

Benzene undergoes electrophilic aromatic substitution (EAS). $FeCl_3$ acts as a Lewis acid catalyst, generating the electrophile $Cl^+$ from $Cl_2$, which then attacks the benzene ring.

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Biology QUESTION #4233

Question 1678

A patient with a genetic disorder undergoes treatment where a normal gene is inserted into their cells. This is called

Gene therapy✔️
Genetic testing
Protein engineering
DNA fingerprinting

Correct Answer Logic:

Inserting normal genes is gene therapy.

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Boilers Mechanical Engineering QUESTION #2540

Question 1679

The parallel-axis (Steiner) theorem gives the second moment of area about an axis parallel to the centroidal axis as:

$I=\bar{I}-Ad^2$
$I=\bar{I}\cdot d^2$
$I=\bar{I}+Ad^2$✔️
$I=\frac{\bar{I}}{Ad^2}$

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.

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Biology QUESTION #7266

Question 1680

In the light of the three-domain classification of life (Bacteria, Archaea, and Eukarya), which statement is true about Archaea?

Archaea completely differ from both prokaryotes and eukaryotes
Archaea completely differ from prokaryotes
Archaea resemble Eukarya in all respects
Archaea have some novel features that are absent in other prokaryotes and eukaryotes✔️

Correct Answer Logic:

Archaea share some features with prokaryotes (no nucleus, no membrane-bound organelles) and some with eukaryotes (similar RNA polymerase, histones, introns). However, they also possess novel, unique features — such as ether-linked membrane lipids (isoprene-based), unique cell wall chemistry (pseudopeptidoglycan or none), and unique rRNA sequences — not found in other domains.

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