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Civil / Architecture QUESTION #2343

Bernoulli's equation for steady incompressible flow expressed as energy per unit weight (head) along a streamline is:

$\dfrac{p}{\rho} + \dfrac{V^2}{2} + gz = C$
$\dfrac{p}{\gamma} + \dfrac{V^2}{2g} + z = C$✔️
$p + \dfrac{1}{2}\rho V + \gamma z = C$
$\dfrac{p}{\gamma} + \dfrac{V}{2g} + z = C$

Correct Answer Logic:

Bernoulli's equation in head form: $\dfrac{p}{\gamma} + \dfrac{V^2}{2g} + z = C$, summing pressure head, velocity head, and elevation head. Option A is the energy-per-unit-mass form (divided by $g$). Option C has incorrect units. Option D incorrectly uses $V$ instead of $V^2$ in the velocity head term.

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Psychology QUESTION #1454

Question 2722

Which approach in psychology emphasizes the role of unconscious drives and early childhood experiences?

Behavioral psychology
Psychoanalysis✔️
Cognitive psychology
Humanistic psychology

Correct Answer Logic:

Psychoanalysis, founded by Sigmund Freud, emphasizes that unconscious drives, repressed memories, and early childhood experiences are the primary determinants of adult personality and behavior. Key concepts include the id/ego/superego, defence mechanisms, and psychosexual stages of development. Behavioral psychology focuses on observable behavior; cognitive on thought processes; humanistic on personal growth and self-actualization.

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Ability / HR / Governance / Special Education QUESTION #1892

Question 2723

Under Rule 10 if a penalty is imposed by order of the President what remedy is available to the aggrieved government servant?

Appeal to the Federal Service Tribunal
No appeal but may apply for review of the order✔️
Appeal to the Supreme Court
Appeal to the Secretary Establishment Division

Correct Answer Logic:

The proviso to Rule 10 states that where penalty is imposed by the President there shall be no appeal but the person may apply for review.

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Electrical Engineering QUESTION #2139

Question 2724

A $4$-pole induction motor is supplied by a $50\text{ Hz}$ source. If the slip $s$ is $0.04$, what is the actual speed of the rotor $N_r$ in RPM?

$1500\text{ RPM}$
$1440\text{ RPM}$✔️
$1410\text{ RPM}$
$1560\text{ RPM}$

Correct Answer Logic:

Synchronous speed $N_s = \frac{120f}{P} = \frac{120 \times 50}{4} = 1500\text{ RPM}$. Rotor speed $N_r = N_s(1 - s) = 1500(1 - 0.04) = 1440\text{ RPM}$.

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Chemistry QUESTION #7168

Question 2725

Which of the following salt solutions is the most efficient for the coagulation of an arsenious sulphide sol?

$BaCl_{2}$
$AlCl_{3}$✔️
$NaCl$
$Na_{2}SO_{4}$

Correct Answer Logic:

For a negatively charged sol like arsenious sulphide, the cation with the highest positive charge will be the most effective coagulant (Hardy-Schulze Rule). Comparing the cations:

$Na^{+}$ from $NaCl$ and $Na_{2}SO_{4}$ (+1)
$Ba^{2+}$ from $BaCl_{2}$ (+2)
$Al^{3+}$ from $AlCl_{3}$ (+3)

$AlCl_{3}$ is the most effective.

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Accounting & Finance QUESTION #1222

Question 2726

When a tax on a good starts small and is gradually increased, tax revenue:

Will fall
Will rise
Will first rise and then fall✔️
Will first fall and then rise

Correct Answer Logic:

This is described by the Laffer Curve. At very low tax rates, revenue is low. As rates rise, revenue increases. But beyond an optimal rate, higher taxes reduce the tax base (less economic activity, more evasion) so revenue begins to fall. Therefore tax revenue first rises and then falls as the tax rate is gradually increased.

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General Knowledge QUESTION #8723

Question 2727

Which country has the highest average life expectancy for males?

Japan✔️
Germany
Iceland
None above

Correct Answer Logic:

Japan consistently has the highest life expectancy.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3379

Question 2728

Which type of lipid is the main component of 'Cell Membranes'?

Triglycerides
Phospholipids✔️
Cholesterol
Steroids

Correct Answer Logic:

Phospholipids form the lipid bilayer due to their amphipathic nature (hydrophilic head, hydrophobic tail).

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Agronomy QUESTION #2024

Question 2729

DAP (Di-Ammonium Phosphate) has the chemical formula $(NH_4)_2HPO_4$ and its N:P₂O₅ analysis is:

46:0
18:46✔️
16:48
14:48

Correct Answer Logic:

DAP contains approximately 18% N and 46% $P_2O_5$, making it one of the most concentrated phosphatic fertilizers. Its high nutrient content (64% total nutrients) makes it highly cost-effective for basal application, particularly for phosphorus supply in cereal and oilseed crops.

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Education QUESTION #6797

Question 2730

A researcher conducting item analysis using CTT calculates item discrimination as D = (UG − LG) / n. For a 40-student class, the upper 27% group (n=11) had 9 correct and the lower 27% group (n=11) had 3 correct. What is D, and how should this item be classified?

D = 0.27; Poor item to be revised
D = 0.55; Excellent item✔️
D = 0.43; Good item approaching excellent
D = 0.82; Poor item due to extreme discrimination

Correct Answer Logic:

D = (Upper Group correct – Lower Group correct) / n per group. Upper Group: 9/11 ≈ 0.818; Lower Group: 3/11 ≈ 0.273. D = 0.818 – 0.273 = 0.545, or using the formula D = (9–3)/11 = 6/11 ≈ 0.55. A D value greater than 0.40 is classified as excellent. This item powerfully differentiates high-ability from low-ability students and should be retained in the item bank.

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Islamic Studies QUESTION #234

Question 2731

The basic obligatory action (Rukn) of Hajj is:

Sa'i
Rami
Wuqof-e-Arafah✔️
None of these

Correct Answer Logic:

Being present at the plain of Arafah is the essential core of the Hajj pilgrimage.

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Civil Procedure QUESTION #3705

Question 2732

A plaintiff (State A) sues a defendant (State B) in federal court in State A. The defendant is served while on a 2-hour layover at an airport in State A. The defendant has no other contacts with State A. The defendant moves to dismiss for lack of personal jurisdiction. How should the court rule?

Grant the motion, because a 2-hour layover is not 'continuous and systematic' contact.
Deny the motion, because 'transient' presence is a valid basis for personal jurisdiction under Burnham v. Superior Court.✔️
Grant the motion, because the cause of action did not arise from the defendant's presence in the airport.
Deny the motion, but only if the defendant was traveling for business purposes.

Correct Answer Logic:

In Burnham v. Superior Court, the Supreme Court upheld the traditional 'tag' jurisdiction, where service on an individual personally present in the forum state is sufficient for personal jurisdiction, regardless of how brief the stay is.

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English QUESTION #512

Question 2733

DOZE

Dogged
Diet
Sleep✔️
Medicine to be taken

Correct Answer Logic:

Doze means to sleep lightly

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Accounting & Finance QUESTION #6140

Question 2734

Which item results in a credit entry in the statement of profit or loss?

A reduction in the allowance for irrecoverable debts✔️
An increase in the allowance for irrecoverable debts
The creation of an allowance for irrecoverable debts
The writing off of a trade receivable as irrecoverable

Correct Answer Logic:

Option A is correct.

When the allowance is reduced, the previously charged expense is released: Debit allowance account; Credit statement of profit or loss — effectively increasing profit.

Options B, C, D all result in debit entries (expenses) that reduce profit.

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General Abilities QUESTION #3968

Question 2735

Calculate the value of the cube of $\frac{1}{3}$.

$\frac{3}{9}$✔️
$\frac{3}{27}$
$\frac{1}{81}$
$\frac{1}{27}$

Correct Answer Logic:

3

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Math Physics Chemistry Biology QUESTION #4238

Question 2736

After liver transplant, doctors suppress the T-lymphocyte activity in patient. Why?

To increase the rate of antibody production
To prevent infections
To avoid graft rejection immune system✔️
To produce antibodies faster

Correct Answer Logic:

Suppressing T-lymphocytes prevents graft rejection.

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Math Physics Chemistry Biology QUESTION #799

Question 2737

The maximum volume of $\text{O}_2$ is at:

HTP
STP✔️
$127°\text{C},\ 1\ \text{atm}$
None

Correct Answer Logic:

At STP (Standard Temperature and Pressure: $0°\text{C},\ 1\ \text{atm}$), gases occupy maximum volume as temperature is lower, keeping more molecules in gaseous phase.

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Pakistan Affairs QUESTION #295

Question 2738

What is the primary objective of Pakistan's "Look East" policy?

Strengthening Western ties
Cultural exchange with Singapore
Economic & diplomatic relations with East Asian nations✔️
Enhancing relations with India

Correct Answer Logic:

It aims to diversify foreign relations by engaging with the ASEAN region and beyond.+1

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English QUESTION #8529

Question 2739

The synonym of 'Exemplify' is:

Over
Illustrate✔️
Answer
Summary

Correct Answer Logic:

Exemplify means to illustrate by example.

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Mathematics QUESTION #7482

Question 2740

For $x \in \mathbb{R} - \{0,1\}$, let $f_1(x) = \frac{1}{x}$, $f_2(x) = 1-x$ and $f_3(x) = \frac{1}{1-x}$ be three given functions. If a function J(x) satisfies $(f_2 \circ J \circ f_1)(x) = f_3(x)$, then J(x) is equal to:

$f_3(x)$✔️
$\frac{1}{x}f_3(x)$
$f_2(x)$
$f_1(x)$

Correct Answer Logic:

We have $(f_2 \circ J \circ f_1)(x) = f_2(J(f_1(x))) = f_2(J(\frac{1}{x})) = 1 - J(\frac{1}{x}) = f_3(x) = \frac{1}{1-x}$. So $J(\frac{1}{x}) = 1 - \frac{1}{1-x} = \frac{1-x-1}{1-x} = \frac{-x}{1-x} = \frac{x}{x-1}$. Replacing $\frac{1}{x}$ with t (so $x = \frac{1}{t}$): $J(t) = \frac{1/t}{1/t - 1} = \frac{1}{1-t} = f_3(t)$.

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