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Boilers Mechanical Engineering QUESTION #4075

Question 7421

'Viscosity' of fuel oil must be reduced by heating to:

Make it taste better
Allow it to flow easily and be atomized by the burner✔️
Increase its weight
Change its color

Correct Answer Logic:

Heavy fuel oils (HFO) are like molasses at room temp and must be hot to spray.

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Accounting & Finance QUESTION #6137

Question 7422

At 31 December: Balance per bank statement $22,650; Uncleared deposits $3,110; Unpresented cheques $6,290; Bank credit recorded twice by bank in error $650. What is the cash book balance for the statement of financial position?

$18,820✔️
$20,120
$25,180
$26,480

Correct Answer Logic:

Option A ($18,820) is correct.

Bank statement balance: $22,650

+ Uncleared deposits: +$3,110

− Unpresented cheques: −$6,290

− Bank error (overstated credit): −$650

Cash book balance = $18,820

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Maths QUESTION #2825

Question 7423

Solve the simultaneous equations: $2x + 3y = 12$ and $x - y = 1$.

x=2 y=3
x=3 y=2✔️
x=4 y=1
x=1 y=4

Correct Answer Logic:

From $x - y = 1$: $x = y + 1$. Substitute into first equation: $2(y+1) + 3y = 12 \Rightarrow 2y + 2 + 3y = 12 \Rightarrow 5y = 10 \Rightarrow y = 2$. Then $x = 3$.

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Disaster Management QUESTION #6516

Question 7424

Which financial mechanism would provide the fastest and most predictable post-disaster liquidity for immediate relief operations?

Traditional budget reallocation
Parametric insurance with predefined triggers✔️
International donor appeals
Contingency loans from development banks

Correct Answer Logic:

Section 9.2 describes parametric insurance as triggering payouts based on predefined thresholds (e.g., rainfall levels) rather than assessed damages. This provides rapid, predictable financial support without lengthy claim assessment processes.

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Statistics QUESTION #2006

Question 7425

A 99% confidence interval for the difference between two population proportions $p_1 - p_2$ uses the critical value $z_{\alpha/2}$ equal to:

1.645
1.960
2.326
2.576✔️

Correct Answer Logic:

For a 99% confidence interval, $\alpha = 0.01$ and $\alpha/2 = 0.005$. The corresponding standard normal critical value is $z_{0.005} = 2.576$. This is the value beyond which only 0.5% of the standard normal distribution lies in each tail.

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Security Measures to Maintain Law and Order QUESTION #960

Question 7426

How can 'Lighting' be a security measure?

For aesthetic nighttime views
To deter criminal activity in dark areas✔️
To help pilots land
To save energy

Correct Answer Logic:

Well-lit perimeters and parking lots reduce the chance of undetected breaches and increase the safety of the public.

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Disaster Management QUESTION #6521

Question 7427

Which approach to infrastructure retrofitting demonstrates the most cost-effective long-term resilience strategy?

Retrofitting all buildings simultaneously
Prioritizing critical public facilities based on risk assessments and conducting quick retrofitting for highly vulnerable structures✔️
Waiting for post-disaster reconstruction opportunities
Focusing only on new construction

Correct Answer Logic:

Section 8.1 prioritizes retrofitting critical facilities (schools, hospitals, emergency centers) based on risk assessments, with provisions for quick retrofitting of highly vulnerable infrastructure. This risk-informed, phased approach maximizes impact with limited resources while ensuring essential services remain operational during disasters.

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Physics QUESTION #7337

Question 7428

A particle has initial velocity $(3\hat{i}+4\hat{j})$ and acceleration $(0.4\hat{i}+0.3\hat{j})$. Its speed after 10 s is:

10 units
7 units
$7\sqrt{2}$ units✔️
8.5 units

Correct Answer Logic:

Velocity at $t = 10\text{ s}$:

$\vec{v} = (3+0.4\times10)\hat{i} + (4+0.3\times10)\hat{j} = 7\hat{i}+7\hat{j}$

Speed $= \sqrt{7^2+7^2} = \sqrt{98} = \mathbf{7\sqrt{2}}$ units

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Biology Zoology Botany QUESTION #1354

Question 7429

The cell wall of fungi is primarily composed of:

Cellulose
Chitin✔️
Pectin
Lignin

Correct Answer Logic:

The cell wall of fungi is primarily composed of chitin — a nitrogen-containing polysaccharide made of N-acetylglucosamine units linked by β-1,4-glycosidic bonds. This is a key distinguishing feature of fungi from plants (whose cell walls contain cellulose). Chitin provides structural strength and rigidity to the fungal cell wall.

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Math Physics Chemistry Biology QUESTION #4332

Question 7430

Why are retroviruses placed in a separate class of RNA viruses?

They always infect animal cells only
Their RNA acts directly as mRNA
They lack protein coats
They use reverse transcriptase to make DNA from RNA✔️

Correct Answer Logic:

Retroviruses (e.g., HIV) carry reverse transcriptase, which synthesizes DNA from their RNA genome — the reverse of the normal DNA $\rightarrow$ RNA flow, hence the name retrovirus.

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Paper-II (Pharmacology and Social Behaviour, Law & Ethics and Computer Sciences) QUESTION #5799

Question 7431

The development of 'Autonomy vs. Shame' typically occurs at what age?

Birth to 8 months
18 months to 3 years✔️
3 to 6 years
6 to 12 years

Correct Answer Logic:

Autonomy vs. Shame occurs between 18 months and 3 years[cite: 7].

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Pakistan Affairs QUESTION #317

Question 7432

In which country did Pakistan open its first embassy?

China
Afghanistan
Iran✔️
India

Correct Answer Logic:

Iran was the first country to recognize Pakistan and where Pakistan established its first diplomatic mission.

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General Knowledge QUESTION #8832

Question 7433

The 'City of Seven Hills' is a nickname for which city?

Milan
Athens
Rome✔️
Zurich

Correct Answer Logic:

Rome is famously built on seven hills.

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Therapeutics and Patient Care QUESTION #3868

Question 7434

For a patient experiencing severe cancer-related bone pain, which analgesic agent offers the most appropriate and effective relief?

Meloxicam✔️
Fentanyl
Amitriptyline
Carbamazepine

Correct Answer Logic:

NSAIDs like meloxicam are particularly effective for bone pain due to their prostaglandin-inhibiting mechanism, which reduces the osteoclast-driven pain of metastatic bone disease.

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Accounting & Finance QUESTION #9621

Question 7435

Which of the following correctly distinguishes between a 'Provision' and a 'Reserve' in financial accounting?

Both are created at the discretion of management and may be used for any purpose
A provision is shown as a deduction from an asset or as a liability; a reserve is shown as part of equity✔️
A reserve reduces profit even if the entity has made a loss; a provision does not affect profit
Provisions are created only when the exact amount of a future obligation is known

Correct Answer Logic:

A provision is created out of necessity to show a true profit (charged to P&L) and is shown either as a deduction from the related asset (e.g., provision for bad debts) or as a current liability (e.g., accrued expenses). A reserve is an appropriation of profit, shown on the equity/liability side of the balance sheet, and is created at management's discretion only when profits exist.

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