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For measles, R_0 is 12–18 (highly contagious), making the herd immunity threshold approximately 92–95%. This is why measles can re-emerge even with 90% vaccination coverage. A Head Nurse must understand herd immunity concepts to advocate for achieving high vaccination coverage targets in EPI campaigns.

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Nursing QUESTION #9250

Question 3284

A patient in ICU develops acute hyperkalemia with serum K$^+ = 7.1 \text{ mEq/L}$ and ECG changes (peaked T waves, wide QRS, sine wave pattern). What is the FIRST and MOST critical intervention?

Administer Sodium Bicarbonate IV to shift K$^+$ intracellularly
Administer IV Calcium Gluconate or Calcium Chloride to stabilize the myocardium✔️
Start Kayexalate (sodium polystyrene sulfonate) to eliminate K$^+$ from the gut
Start emergent hemodialysis to remove excess K$^+$

Correct Answer Logic:

Correct Answer: B — IV Calcium (Gluconate or Chloride) — cardiac membrane stabilization

Management of Acute Severe Hyperkalemia — Stepwise Approach:

Step	Drug/Intervention	Onset	Mechanism
1 (First priority)	IV Calcium Gluconate 10% (10 mL) or Calcium Chloride	1–3 min	Stabilizes cardiac membrane (does NOT lower K$^+$)
2	IV Insulin + Dextrose (10 units regular insulin + 50 mL D50%)	15–30 min	Shifts K$^+$ intracellularly
3	Salbutamol nebulization (10–20 mg)	15–30 min	Shifts K$^+$ intracellularly via $\beta_2$ stimulation
4	Sodium Bicarbonate (if acidotic)	30–60 min	Shifts K$^+$ intracellularly
5	Kayexalate / Patiromer	Hours	GI elimination of K$^+$
6	Hemodialysis	Immediate	Definitive removal — for refractory cases

Calcium is given FIRST because it prevents fatal arrhythmias immediately — it stabilizes the myocardial membrane without changing K$^+$ levels.

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Geography QUESTION #6346

Question 3285

In the context of state territorial organization, a 'compact state' shape offers advantages over an 'elongated state' in terms of:

Easier internal communication and governance from centrally located capital✔️
Greater natural resource diversity
Better natural defense boundaries
Larger territorial extent

Correct Answer Logic:

Compact states (roughly circular/hexagonal) minimize maximum distance from capital to borders, facilitating easier governance, efficient transport networks, cultural cohesion, and defense. Elongated states face challenges: distant regions are harder to govern and may develop separate regional identities.

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Electrical Engineering QUESTION #2136

Question 3286

According to Tellegen's Theorem, for any network with $b$ branches and $n$ nodes, the algebraic sum of power delivered to all branches at any instant is:

Always positive
Dependent on the type of elements
Zero✔️
Equal to the total energy stored

Correct Answer Logic:

Tellegen's Theorem is based on KCL and KVL; it states that $\sum_{k=1}^{b} v_k i_k = 0$, meaning the sum of power delivered to all branches in a network is zero.

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General Abilities QUESTION #4634

Question 3287

What is the value of $2 + 3 \times 4 - 5$?

$15$
$9$✔️
$4$
$20$

Correct Answer Logic:

PEMDAS: $2 + 12 - 5 = 9$

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General Knowledge QUESTION #7722

Question 3288

Who is the father of Pashto literature?

Rehman Baba
Khushal Khan Khattak✔️
Beram Khan
None of these

Correct Answer Logic:

Khushal Khan Khattak (1613-1689) is widely regarded as the father of Pashto literature. He was a warrior-poet who greatly enriched Pashto poetry and literature with his works on themes of honor, bravery, and resistance.

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Boilers Mechanical Engineering QUESTION #4022

Question 3289

'Induced Draft' fans are located:

Before the furnace
At the base of the chimney (after the boiler)✔️
Inside the drum
In the fuel tank

Correct Answer Logic:

They 'pull' the flue gases out of the boiler, creating a slightly negative pressure in the furnace.

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Accounting & Finance QUESTION #6086

Question 3290

L and M are partners sharing profits 3:2. Data at year-end:

Item	L ($)	M ($)
Capital	200,000	150,000
Interest on Capital (8%)	-	-
Drawings	30,000	20,000
Interest on Drawings (5%)	-	-
Salaries	22,000	17,000

If L's share of residual profit was $24,000, what was the total profit for the year before appropriation?

$48,500
$88,500
$104,500✔️
$109,500

Correct Answer Logic:

1. Total Residual Profit = $24,000 / 0.6 = $40,000.
2. Total Interest on Capital = ($200k + $150k) $\times$ 8% = $28,000.
3. Total Salaries = $22k + $17k = $39,000.
4. Total Interest on Drawings = ($30k + $20k) $\times$ 5% = $2,500.
Profit = Residual ($40,000) + Interest on Cap ($28,000) + Salaries ($39,000) - Interest on Drawings ($2,500) = $104,500.

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Contracts QUESTION #5866

Question 3291

A Seller repudiates a contract three weeks before the delivery date. Can the Buyer sue immediately?

No, the Buyer must wait until the date of performance.
Yes, the Buyer can treat the anticipatory repudiation as an immediate breach.✔️
Yes, but only if the Buyer is a merchant.
No, unless the contract is for more than $10,000.

Correct Answer Logic:

Under UCC §2-610, when either party repudiates the contract with respect to a performance not yet due, the aggrieved party may resort to any remedy for breach.

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General Abilities QUESTION #61

Question 3292

A city council introduced a policy to reduce traffic congestion by charging drivers a fee to enter the downtown area during peak hours. The goal was to discourage car usage and encourage public transportation. Six months after implementation, data showed that traffic volume in the downtown area dropped by 18 percent. However, surveys revealed that bus and train ridership increased by only 5 percent. At the same time, several nearby neighborhoods reported a significant rise in traffic during peak hours. Local businesses outside the downtown zone complained that delivery delays had increased because roads leading to their locations were more congested.

Sub-Questions:

Question 1

Based on the passage above, which of the following statements is most strongly supported?

The traffic fee likely caused some drivers to change their routes rather than stop driving.
The new fee caused most drivers to switch to public transportation.
The traffic fee likely caused some drivers to change their routes rather than stop driving.✔️
Local businesses benefited from faster traffic movement in their areas.

Question 2

The traffic fee likely caused some drivers to change their routes rather than stop driving.

The new fee caused most drivers to switch to public transportation.
Based on the passage above, which of the following statements is most strongly supported?✔️
Local businesses benefited from faster traffic movement in their areas.✔️
None of these

Correct Answer Logic:

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Journalism / Mass Communication QUESTION #6419

Question 3293

The Federal Trade Commission Act (1914) and the Wheeler-Lea Amendment (1938) were both significant in the regulation of advertising in the United States. What did each law specifically target?

FTC Act targeted newspaper monopolies; Wheeler-Lea targeted broadcast advertising
FTC Act (1914) empowered the FTC to regulate 'unfair methods of competition'; Wheeler-Lea Amendment (1938) extended FTC powers to cover 'unfair or deceptive acts or practices' — broadening consumer protection in advertising✔️
FTC Act created the advertising industry; Wheeler-Lea standardised commission rates at 15%
FTC Act targeted product placement; Wheeler-Lea targeted political advertising

Correct Answer Logic:

The history of advertising regulation in the U.S. reflects the tension between commercial freedom and consumer protection:

Federal Trade Commission Act (1914): Created the Federal Trade Commission and gave it authority to regulate “unfair methods of competition” — primarily focused on preventing anti-competitive business practices that harmed competitor companies
Wheeler-Lea Amendment (1938): Extended the FTC's jurisdiction to include “unfair or deceptive acts or practices” — crucially, this meant the FTC could now act against advertising that harmed consumers, not just competitor businesses

Other advertising regulations mentioned in the textbook include: the Highway Beautification Act (1965) regulating billboard placement; legal action against R.J. Reynolds' “Joe Camel” campaign; and voluntary codes by the Distilled Spirits Council. Political advertising enjoys First Amendment protection but faces constraints under FCC Equal Access Law and the Federal Election Campaign Act.

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Dairy Food Science and Technology QUESTION #5872

Question 3294

UHT processing of milk typically involves heating at:

$72^{\circ}\text{C}$ for $15$ seconds
$85^{\circ}\text{C}$ for $30$ minutes
$135\text{–}150^{\circ}\text{C}$ for $2\text{–}5$ seconds✔️
$121^{\circ}\text{C}$ for $15$ minutes

Correct Answer Logic:

UHT processing uses temperatures of $135\text{–}150^{\circ}\text{C}$ for $2\text{–}5$ seconds. This achieves commercial sterility while minimizing heat damage to nutrients and flavor compared to in-bottle sterilization.

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Chemistry QUESTION #7179

Question 3295

What is the correct SI unit for the van der Waals parameter '$a$' as used in the equation $(P + \frac{an^{2}}{V^{2}})(V - nb) = nRT$?

$atm \text{ dm}^{6} \text{ mol}^{-2}$✔️
$kg \text{ m s}^{-1}$
$kg \text{ m s}^{-2}$
$dm^{3} \text{ mol}^{-1}$

Correct Answer Logic:

The term $\frac{an^{2}}{V^{2}}$ must have the same units as pressure ($P$).

$[a] = \frac{P \times V^{2}}{n^{2}}$
In common units, this translates to $\text{atm} \times (\text{dm}^{3})^{2} / \text{mol}^{2}$
Result: $atm \text{ dm}^{6} \text{ mol}^{-2}$

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Security Measures to Maintain Law and Order QUESTION #937

Question 3296

What is the function of a 'Security Awareness Program' for non-security staff?

To train them as guards
To teach them to recognize and report threats✔️
To reduce their working hours
To monitor their productivity

Correct Answer Logic:

Every airport employee acts as an extra "eyes and ears" when they are trained to recognize suspicious activity.

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Ability / HR / Governance / Special Education QUESTION #1896

Question 3297

Under Rule 3(c)(ii) which lifestyle indicator can make a government servant liable to be considered corrupt?

Owning a vehicle
Residing in a government house
Assuming a style of living beyond his ostensible means✔️
Travelling abroad on official duty

Correct Answer Logic:

Rule 3(c)(ii) specifically mentions assuming a style of living beyond ostensible means as a corruption indicator.

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Chemistry QUESTION #437

Question 3298

The extent of un-saturation in a fat is expressed as its

Acid number
Iodine number✔️
Saponification number
None of these

Correct Answer Logic:

Iodine number measures unsaturation

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Geography QUESTION #1245

Question 3299

The point in the sky directly over the observer is called:

Horizon
Zenith✔️
Aphelion
None of these

Correct Answer Logic:

The zenith is the point in the celestial sphere directly above an observer — the point at exactly 90° from all points on the observer's horizon. The horizon is the line where the sky meets the Earth. Aphelion is the point in Earth's orbit farthest from the Sun. The zenith is used as a reference point in astronomy and navigation.

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Civil Engineering QUESTION #6628

Question 3300

In prestressed concrete, 'Relaxation' refers to which phenomenon?

Loss of concrete strength over time
Decrease in stress in steel under constant strain✔️
Shortening of concrete due to sustained loading
The increase in tendon length due to temperature

Correct Answer Logic:

Steel relaxation is the decrease in stress of the prestressing steel when it is held at a constant strain over time.

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