Reading Mode - Questions

Boilers Mechanical Engineering QUESTION #4082

Question 4421

'Boiler Log Book' is a legal and technical record used to:

Write poems
Track daily readings, maintenance, and water chemistry for safety/legal proof✔️
Record the weight of the operator
List the price of steam

Correct Answer Logic:

In the event of an accident, the log book is the first thing investigators look at.

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Quantitative Reasoning QUESTION #8004

Question 4422

There are, as yet, no vegetation types or ecosystems whose study has been ------- to the extent that they no longer ------- ecologists.

perfected...hinder
exhausted...interest✔️
prolonged...require
prevented...challenge

Correct Answer Logic:

The sentence suggests that no ecosystem has been studied so thoroughly that scientists have lost interest in it. The first blank needs a word meaning 'fully explored' or 'depleted,' and the second needs a word meaning 'engage' or 'attract.' Exhausted...interest fits perfectly: no ecosystem has been studied to exhaustion (completely used up as a subject of study) such that it no longer interests researchers—there's always more to discover.

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Math Physics Chemistry Biology QUESTION #4187

Question 4423

Which of the following is common between aldosterone, sex hormone and cortisone?

They are peptides
They are Phospholipids
They are steroids✔️
They are glycoproteins

Correct Answer Logic:

Aldosterone, sex hormones, and cortisone are all steroid hormones.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3632

Question 4424

If a pharmacist finds that a sample of 'Digitalis' leaves has $20\%$ moisture, why is this a problem?

Moisture promotes enzyme activity and microbial growth, leading to drug deterioration✔️
Moisture makes the drug too heavy
Moisture turns the drug into a liquid
There is no problem

Correct Answer Logic:

Crude drugs must be dried to prevent chemical breakdown and spoilage.

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Accounting & Finance QUESTION #6104

Question 4425

Motor vehicles costing $530,000 were depreciated at 10% straight-line instead of the correct 25%. After incorrect entries: Motor vehicles at cost $530,000; Provision for depreciation $53,000. Which journal entries will correct the error?

Debit: Provision for depreciation $79,500 | Credit: Statement of profit or loss $79,500
Debit: Provision for depreciation $132,500 | Credit: Statement of profit or loss $132,500
Debit: Statement of profit or loss $79,500 | Credit: Provision for depreciation $79,500✔️
Debit: Statement of profit or loss $132,500 | Credit: Provision for depreciation $132,500

Correct Answer Logic:

Option C is correct.

Correct depreciation = $530,000 × 25% = $132,500

Already charged = $530,000 × 10% = $53,000

Additional needed = $132,500 − $53,000 = $79,500

Entry: Debit Statement of profit or loss $79,500 | Credit Provision for depreciation $79,500

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General Knowledge QUESTION #8810

Question 4426

What is the daily calorie requirement recommended by the UN for an average young man?

2200 calories✔️
2300 calories
2400 calories
2600 calories

Correct Answer Logic:

The UN recommends approximately 2,200 calories per day.

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Law QUESTION #9686

Question 4427

Article 46-A makes electronic documents generated by an automated information system relevant facts if:

The system is certified by the government
The system was in working order✔️
Two witnesses verify the output
The electronic signature is applied

Correct Answer Logic:

Article 46-A states that statements in the form of electronic documents generated, received or recorded by an automated information system while it is in working order are relevant facts.

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Mathematics QUESTION #6930

Question 4428

Let $T_n$ denote the total number of triangles that can be formed by joining the vertices of a regular polygon with $n$ sides. If $T_{n+1} - T_n = 10$, find the value of $n$.

7✔️
5
10
8

Correct Answer Logic:

A triangle is formed by choosing any 3 vertices from $n$ vertices, so $T_n = \binom{n}{3}$.

$T_{n+1} - T_n = \binom{n+1}{3} - \binom{n}{3} = \binom{n}{2}$

Setting $\binom{n}{2} = 10$: $\dfrac{n(n-1)}{2} = 10 \Rightarrow n(n-1) = 20 \Rightarrow n = 5$... wait: $5 \times 4 = 20$ ✓. But checking $n=5$: $T_6 - T_5 = \binom{6}{3}-\binom{5}{3}=20-10=10$ ✓. So $n = 5$.

Actually re-checking: $\binom{n}{2}=10 \Rightarrow n=5$. Answer: $n=\mathbf{5}$, but the JEE 2013 answer is $n=5$. Wait — options show 7 as (A). Let me verify: $T_{n+1}-T_n=\binom{n}{2}=10 \Rightarrow n(n-1)=20 \Rightarrow n=5$. The correct answer is $\mathbf{5}$ (option B, index 1).

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Professional QUESTION #1841

Question 4429

Section 15A on Declaration of Assets requires civil servants of which Basic Pay Scale and above to digitally file declarations of assets with the Federal Board of Revenue?

BS-16 and above
BS-17 and above✔️
BS-18 and above
BS-19 and above

Correct Answer Logic:

Section 15A inserted by Act No. XX of 2025 requires that the declaration of assets of a civil servant of BS-17 and above, along with assets and liabilities of his spouse and dependent children including domestic and foreign assets, shall be digitally filed with the Federal Board of Revenue and made publicly available.

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Maths QUESTION #4588

Question 4430

If $a:b = 1:2$ and $b:c = 3:4$, find $a:b:c$:

$1:2:4$
$3:6:8$✔️
$1:3:4$
Both B and C

Correct Answer Logic:

Make $b$ equal in both ratios: $a:b = 3:6$ and $b:c = 6:8$. So $a:b:c = 3:6:8$

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Islamic Studies QUESTION #8223

Question 4431

The tragic incident of Karbala took place during the month of Muharram in the Hijri:

55 AH
61 AH✔️
70 AH
72 AH

Correct Answer Logic:

This is a repeat of questions 97 and 162. The tragedy of Karbala occurred in 61 AH (680 CE) on the 10th of Muharram (Day of Ashura). Imam Hussain (RA), grandson of the Prophet (PBUH), along with his family and companions, was martyred by Yazid's forces. This event profoundly impacted Islamic history and is commemorated annually, particularly by Shia Muslims through mourning rituals during the first ten days of Muharram.

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MCQs Section QUESTION #5191

Question 4432

درست محاورہ بتائیں؟

ٹانگ ٹانگے مارنا
ناچ نہ جانے آنگن ٹیڑھا✔️
تارے دکھائی دینا
ان میں سے کوئی نہیں

Correct Answer Logic:

صحیح ضربِ مثل ہے: 'ناچ نہ جانے آنگن ٹیڑھا' یعنی اپنی غلطی کو چھپانے کے لیے بہانہ ڈھونڈنا۔

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Math Physics Chemistry Biology QUESTION #800

Question 4433

The order of rate of diffusion is:

$\text{SO}_2 > \text{CO}_2 > \text{Br}_2 > \text{NH}_3$
$\text{Br}_2 < \text{SO}_2 < \text{CO}_2 < \text{NH}_3$✔️
$\text{Br}_2 > \text{SO}_2 > \text{CO}_2 > \text{NH}_3$
$\text{SO}_2 < \text{CO}_2 < \text{Br}_2 < \text{NH}_3$

Correct Answer Logic:

By Graham's law, rate of diffusion $\propto \dfrac{1}{\sqrt{M}}$. Molar masses: $\text{NH}_3=17 < \text{CO}_2=44 < \text{SO}_2=64 < \text{Br}_2=160$. So $\text{Br}_2 < \text{SO}_2 < \text{CO}_2 < \text{NH}_3$.

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Chemistry QUESTION #7398

Question 4434

The correct order of sizes for the following species is:

$\text{Ca}^{2+} < \text{K}^+ < \text{Ar} < \text{Cl}^- < \text{S}^{2-}$
$\text{Ar} < \text{Ca}^{2+} < \text{K}^+ < \text{Cl}^- < \text{S}^{2-}$
$\text{Ca}^{2+} < \text{Ar} < \text{K}^+ < \text{Cl}^- < \text{S}^{2-}$✔️
$\text{Ca}^{2+} < \text{K}^+ < \text{Ar} < \text{S}^{2-} < \text{Cl}^-$

Correct Answer Logic:

All species are isoelectronic (18 electrons).
Size decreases as nuclear charge increases (more protons pull same electrons closer):

$\text{Ca}^{2+}$: Z=20
$\text{Ar}$: Z=18
$\text{K}^+$: Z=19
$\text{Cl}^-$: Z=17
$\text{S}^{2-}$: Z=16

Increasing size: $\text{Ca}^{2+} < \text{K}^+ < \text{Ar} < \text{Cl}^- < \text{S}^{2-}$

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Chemistry QUESTION #7164

Question 4435

In the redox titration of oxalate ions with permanganate in an acidic medium, how many electrons are involved in the production of a single molecule of $CO_{2}$?

$5$
$2$
$10$
$1$✔️

Correct Answer Logic:

The half-reaction for oxalate is: $C_{2}O_{4}^{2-} \rightarrow 2CO_{2} + 2e^{-}$. In this process, 2 electrons are released for every two molecules of $CO_{2}$ produced. Therefore, for one molecule of $CO_{2}$, the number of electrons involved is $2/2 = 1$.

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Physics QUESTION #383

Question 4436

In LED when an electron combines with a __________ during forward bias conduction

a photon of visible light is emitted.✔️
High voltage
Photon
Hole

Correct Answer Logic:

2

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Math Physics Chemistry Biology QUESTION #4302

Question 4437

Which of the following blood vessels have the lowest blood velocity, with correct reason?

Arteries: Due to thick walls
Capillaries: due to highest overall cross-sectional area✔️
Veins: due to blood flow against gravity
Capillaries: Due to two-way blood flow in capillaries

Correct Answer Logic:

Blood velocity is lowest in capillaries because the total cross-sectional area of all capillaries combined is the greatest, so by continuity, blood slows down significantly.

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English QUESTION #8310

Question 4438

Her voice is as sweet as _______ nightingale.

That of the✔️
the
Or
none of these

Correct Answer Logic:

'That of the' compares voice to the nightingale's voice.

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CISA QUESTION #6854

Question 4439

An IS auditor finds that penetration testing is conducted annually but identified vulnerabilities are not tracked in a centralized system and remediation is not verified. What is the PRIMARY control weakness?

Insufficient testing frequency
Lack of vulnerability remediation tracking and verification makes testing ineffective✔️
Poor documentation
Limited testing scope

Correct Answer Logic:

Penetration testing is only valuable if findings lead to remediation. Without centralized tracking and verification, vulnerabilities may not be fixed, fixes may be incomplete, or new vulnerabilities may be introduced. The testing investment provides no actual security improvement if findings are not systematically addressed and verified.

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Information Technology QUESTION #1145

Question 4440

In SQL, which command is used to remove all records from a table without deleting the table structure?

DELETE
DROP
TRUNCATE✔️
REMOVE

Correct Answer Logic:

TRUNCATE is a DDL command that quickly removes all rows from a table while keeping the table definition and constraints intact.

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