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Ability / HR / Governance / Special Education QUESTION #1883

A government servant is accused of subversion. Under Rule 5(1)(i) who can approve continuation of suspension beyond three months?

The Authorized Officer alone
The Authority after every three months✔️
The Inquiry Officer
The Secretary Establishment Division in all cases

Correct Answer Logic:

Rule 5(1)(i) states that continuation of leave or suspension beyond the initial period requires approval of the authority after every three months.

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MBBS QUESTION #10290

Question 2

Chvostek's sign (facial muscle twitching on tapping over the facial nerve) and Trousseau's sign (carpal spasm on blood pressure cuff inflation) both indicate neuromuscular irritability (tetany), classically seen in which electrolyte/hormonal disturbance?

Hypocalcemia, as in hypoparathyroidism✔️
Hypercalcemia
Hyperkalemia
Hypernatremia

Correct Answer Logic:

Low ionized calcium increases neuronal membrane excitability by lowering the threshold for Na+ channel activation, producing spontaneous neuromuscular irritability — clinically demonstrated by Chvostek's and Trousseau's signs, classically seen in hypoparathyroidism or other causes of hypocalcemia.

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Electronics Engineering QUESTION #11704

Question 3

An $\text{I}^2\text{C}$ bus communication fails intermittently when cable length exceeds 30 cm. The most effective corrective action is:

Increase the pull-up resistor value to slow signal edges
Reduce the pull-up resistor value to decrease rise time✔️
Switch to SPI protocol
Increase the clock frequency to compensate for capacitance

Correct Answer Logic:

Long cables add parasitic capacitance to the $\text{I}^2\text{C}$ bus, increasing the RC rise time constant ($\tau = R_{pull-up} \times C_{bus}$). Reducing the pull-up resistor decreases rise time, keeping signals within the valid logic-level timing windows. However, too-small resistors increase current draw. Active $\text{I}^2\text{C}$ bus extenders are used for very long runs.

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Mathematics QUESTION #11191

Question 4

Projection of $\mathbf{a}$ on $\mathbf{b}$ is:

$\mathbf{a}\cdot\mathbf{b}$
$\dfrac{\mathbf{a}}{|\mathbf{a}|}\cdot\mathbf{b}$
$\mathbf{a}\cdot\dfrac{\mathbf{b}}{|\mathbf{b}|}$✔️
$\mathbf{a}\times\mathbf{b}$

Correct Answer Logic:

The scalar projection of $\mathbf{a}$ onto $\mathbf{b}$ is $\mathbf{a}\cdot\hat{\mathbf{b}} = \mathbf{a}\cdot\dfrac{\mathbf{b}}{|\mathbf{b}|}$. This gives the component of $\mathbf{a}$ in the direction of $\mathbf{b}$, equal to $|\mathbf{a}|\cos\theta$ where $\theta$ is the angle between the vectors.

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CISA QUESTION #1760

Question 5

Which charge-back model is most associated with violations of separation of duties and unauthorized use of authority?

Sponsor pays✔️
Actual usage billing
Charge-back
Budgeted cost

Correct Answer Logic:

The 'sponsor pays' model is notorious for problems such as exceeding authority, violating separation of duties, and failing to implement all required governance controls. Sponsors tend to fund only what serves their own agenda rather than organizational needs.

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Biology Zoology Botany QUESTION #1389

Question 6

The study of heritable changes in gene expression without alteration in the underlying DNA sequence is called:

Epigenetics✔️
Genetics
Genomics
Evolutionary biology

Correct Answer Logic:

Epigenetics is the study of heritable changes in gene expression that do not involve changes to the underlying DNA sequence. Mechanisms include DNA methylation, histone modification, and non-coding RNA regulation. These changes can be influenced by the environment and may be passed from parent to offspring, affecting gene activity without altering the genetic code.

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Chemistry QUESTION #7162

Question 7

Which of the following chemical equations is correctly balanced and shows the right products?

$[Mg(H_{2}O)_{6}]^{2+} + (EDTA)^{4-} \rightarrow [Mg(EDTA)]^{2-} + 6H_{2}O$✔️
$CuSO_{4} + 4KCN \rightarrow K_{2}[Cu(CN)_{4}] + K_{2}SO_{4}$
$Li_{2}O + 2KCl \rightarrow 2LiCl + K_{2}O$
$CO + 2H_{2} \xrightarrow{catalyst} CH_{3}OH$

Correct Answer Logic:

Option 1 is the correct representation of a complexometric reaction where the polydentate ligand EDTA replaces the water molecules coordinated to Magnesium. Note that the charge on the resulting complex is correctly balanced as $2 + (-4) = -2$.

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General Knowledge QUESTION #8649

Question 8

What is the approximate percentage of carbon dioxide in Earth's atmosphere?

$20\%$
$40\%$
$60\%$
None of these✔️

Correct Answer Logic:

CO2 is about 0.04%, so 'None of these' is correct.

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Dairy Food Science and Technology QUESTION #5986

Question 9

'Furosine' formed in heated milk products is used as a marker of:

Fat oxidation
Maillard reaction advancement — furosine is formed from Amadori products (lysine-lactose adducts) on acid hydrolysis; HTST milk $<5\;\text{mg}/100\;\text{g}$ protein; UHT milk $50\text{–}150\;\text{mg}/100\;\text{g}$ protein; in-bottle sterilized milk $>150\;\text{mg}/100\;\text{g}$ protein✔️
Proteolysis during ripening
Lipase activity in raw milk

Correct Answer Logic:

Furosine ($\varepsilon$-N-(2-furoylmethyl)-L-lysine) is formed from Amadori products (early-stage Maillard reaction intermediate of lysine-lactose) upon acid hydrolysis. HTST milk $<5\;\text{mg}/100\;\text{g}$ protein; UHT milk $50\text{–}150\;\text{mg}/100\;\text{g}$ protein; in-bottle sterilized milk $>150\;\text{mg}/100\;\text{g}$ protein.

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Physics QUESTION #7056

Question 10

Find the work done by $0.5 \text{ moles}$ of an ideal monoatomic gas when it is heated at a constant pressure of $1 \text{ atm}$ from $20^\circ\text{C}$ to $90^\circ\text{C}$. (Take $R = 8.31 \text{ J/mol}\cdot\text{K}$)

$581 \text{ J}$
$291 \text{ J}$✔️
$146 \text{ J}$
$73 \text{ J}$

Correct Answer Logic:

Work done at constant pressure is given by $W = P \Delta V$.

Using the ideal gas law ($PV = nRT$), at constant pressure, $P \Delta V = n R \Delta T$.

$W = 0.5 \times 8.31 \times (90 - 20)$

$W = 0.5 \times 8.31 \times 70 = 35 \times 8.31 = 290.85 \text{ J}$.

Rounding gives approximately $291 \text{ J}$.

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Education QUESTION #6776

Question 11

In a criterion-referenced test (CRT) context, a cut score of 70% is set to distinguish 'master' from 'non-master'. After the exam, 85% of students pass. Which statement about this result is MOST consistent with CRT principles?

This result is anomalous because CRT normally produces a normal distribution of scores
This result is expected and acceptable in CRT; mastery tests are designed with relatively easy items, and it is desirable that most students demonstrate mastery✔️
This outcome shows the test lacked discriminating power and should be revised for better spread
The cut score should be raised to 90% to reduce the pass rate to a more appropriate level

Correct Answer Logic:

In CRT, the test is designed to assess mastery of a defined set of skills; it does not aim to spread students along a distribution. It is entirely acceptable — even ideal — for most students to pass if they have mastered the content. Around 80% correct per item is the expected CRT item difficulty. The purpose is mastery verification, not comparison or ranking.

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Dairy Food Science and Technology QUESTION #5874

Question 12

The Methylene Blue Reduction Test (MBRT) estimates milk quality by measuring:

Somatic cell count
Fat content
Bacterial metabolic activity that decolorizes methylene blue✔️
Antibiotic residues

Correct Answer Logic:

MBRT is a reductase test. Bacterial enzymes reduce methylene blue (blue) to leucomethylene blue (colorless). Faster decolorization indicates higher bacterial load and poorer milk quality.

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Civil / Architecture QUESTION #2356

Question 13

In the Response Spectrum Method of seismic analysis for a multi-degree-of-freedom (MDOF) structure, which modal combination rule accounts for both the modal responses and the correlation between closely spaced modes?

SRSS (Square Root of Sum of Squares)
CQC (Complete Quadratic Combination)✔️
Absolute Sum (ABS)
SRSS with 10% rule

Correct Answer Logic:

The Complete Quadratic Combination (CQC) rule accounts for cross-correlation between modes, which is significant when modal frequencies are closely spaced (within 10% of each other). SRSS assumes all modes are uncorrelated (appropriate for well-separated modes). ABS is overly conservative. CQC reduces to SRSS when all modes are well-separated (correlation coefficients approach zero).

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Math Physics Chemistry Biology QUESTION #7766

Question 14

Which characteristic does NOT apply to smooth muscle?

Controlled by autonomic nervous system
Spindle-shaped cells
Lines the wall of the heart✔️
Lack striations

Correct Answer Logic:

Smooth muscle lines walls of hollow organs (blood vessels, intestines, bladder). Cardiac muscle lines the heart wall. Smooth muscle lacks striations, is involuntary, and cells are spindle-shaped.

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Academic/Professional (Social Sciences) QUESTION #6485

Question 15

In the context of Pakistani society, which term best describes the hierarchical social structure often found in rural areas based on lineage?

Caste System
Biradari System✔️
Feudalism
Class Stratification

Correct Answer Logic:

The Biradari system is a significant social organization in Pakistan, emphasizing kinship and common ancestry.

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English QUESTION #7872

Question 16

Complete the analogy: Order is the law of civilization as chaos is the law of the ______.

City
Metropolis
Physician
Wilderness✔️

Correct Answer Logic:

This is a classic contrast: civilization represents order, while the wilderness (nature untamed) represents chaos. The phrase evokes the idea that human society creates order, whereas wild nature is chaotic.

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Civil / Architecture QUESTION #2335

Question 17

In airport terminal design, the standard space allocation per passenger for bars and shopping areas is:

$1.4 \, \text{m}^2$
$1.8 \, \text{m}^2$
$2.1 \, \text{m}^2$✔️
$2.0 \, \text{m}^2$

Correct Answer Logic:

According to The Architects' Handbook (Pickard), the terminal building space standards per passenger allocate $2.1 \, \text{m}^2$ for bars/shopping areas — the largest allocation. Check-in is $1.4 \, \text{m}^2$, departure lounge $1.8 \, \text{m}^2$, and customs/immigration $2.0 \, \text{m}^2$.

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Boilers Mechanical Engineering QUESTION #4019

Question 18

The 'Boiling Point' of water inside a boiler at $10~bar$ pressure is:

Exactly $100^\circ\text{C}$
Higher than $100^\circ\text{C}$✔️
Lower than $100^\circ\text{C}$
The same as at sea level

Correct Answer Logic:

As pressure increases, the boiling temperature of water also increases.

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Statistics QUESTION #1959

Question 19

For a certain event (sure event), the value of probability is:

1✔️
0.5
0.2

Correct Answer Logic:

A sure or certain event is one that will definitely occur. By the axioms of probability, $P(S) = 1$, where $S$ is the sample space or sure event.

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The Elections Act 2017 QUESTION #9407

Question 20

Under Section 9(3), after publication of a returned candidate's name, the Commission's power to declare a poll void under sub-section (1) may be exercised within how many days of such publication before the election becomes final (subject to election petition)?

Thirty days
Forty-five days
Sixty days✔️
Ninety days

Correct Answer Logic:

Section 9(3) allows the Commission to exercise void-declaration powers 'before the expiration of sixty days after such publication'; if not finally disposed of within this period, the election becomes final subject to election petition.

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