Reading Mode - Questions

Statistics QUESTION #1961

In a regression model $\hat{Y} = a + bX$, which variable represents the one being estimated or predicted?

Dependent variable $(Y)$✔️
Independent variable $(X)$
Intervening variable
Exogenous variable

Correct Answer Logic:

In regression analysis, the dependent variable (also called response variable) is the one being predicted or estimated. The independent variable $X$ is the predictor.

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Administration QUESTION #2927

Question 2

What is "Performance Budgeting" designed to measure?

Quantity of inputs
Cost of labor
Outputs and outcomes achieved✔️
Historical spending patterns

Correct Answer Logic:

Performance budgeting links funding to the achievement of specific goals and measurable results.

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English QUESTION #2776

Question 3

Which ONE WORD means: 'The study of ancient cultures by digging up remains'?

Geology
Astrology
Archaeology✔️
Anthropology

Correct Answer Logic:

'Archaeology' is the study of human history and prehistoric cultures through excavation and analysis of artifacts and remains. Geology studies Earth's physical structure; Astrology studies celestial bodies' supposed influence on humans; Anthropology studies human societies.

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Logical Reasoning QUESTION #3937

Question 4

What is the most opposite to the meaning of 'GREGARIOUS'?

Sociable✔️
Introverted
Friendly
Hostile

Correct Answer Logic:

1

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Chemistry QUESTION #4360

Question 5

Acetaldehyde undergoes oxidation to produce acetic acid. In this reaction, the oxidizing agent used is:

HI
$LiAlH_4$
$K_2Cr_2O_7$✔️
$NaBH_4$

Correct Answer Logic:

$CH_3CHO$ is oxidized to $CH_3COOH$ (acetic acid). $K_2Cr_2O_7$ (potassium dichromate) is the oxidizing agent. $LiAlH_4$ and $NaBH_4$ are reducing agents.

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Civil Engineering QUESTION #6606

Question 6

A wide-flange section is used as a beam-column. If the axial load ratio $P_u / (\phi P_n)$ is greater than 0.2, which interaction equation form is required by AISC?

$\frac{P_u}{\phi P_n} + \frac{M_u}{\phi M_n} \le 1.0$
$\frac{P_u}{2\phi P_n} + \frac{M_u}{\phi M_n} \le 1.0$
$\frac{P_u}{\phi P_n} + \frac{8}{9}(\frac{M_{ux}}{\phi_b M_{nx}} + \frac{M_{uy}}{\phi_b M_{ny}}) \le 1.0$✔️
$\frac{P_u}{\phi P_n} + \frac{1}{2}(\frac{M_u}{\phi M_n}) \le 1.0$

Correct Answer Logic:

For $P_u / \phi P_n \ge 0.2$, the AISC interaction formula weights the axial component fully and reduces the moment component slightly (multiplied by 8/9). For ratios < 0.2, the axial component is halved.

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Planning QUESTION #4988

Question 7

In cost-benefit analysis, if Benefit-Cost Ratio (BCR) is 0.85, the project should be:

Immediately approved
Rejected✔️
Modified and reanalyzed
Implemented with subsidies

Correct Answer Logic:

BCR = $\frac{\text{PV of Benefits}}{\text{PV of Costs}}$ < 1.0 indicates costs exceed benefits, making the project economically unviable from a welfare perspective. Projects should only proceed if BCR ≥ 1.0, meaning benefits justify costs.

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General Knowledge QUESTION #4778

Question 8

What is the name of Sri Lanka's official currency?

Rupiyah
Lek
Ringgit
Sri Lankan Rupee✔️

Correct Answer Logic:

The official currency of Sri Lanka is the Sri Lankan Rupee (LKR), which has been in use since 1872. Lek is Albanian, Ringgit is Malaysian.

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Disaster Management QUESTION #6523

Question 9

Which gender-sensitive DRR intervention addresses root causes rather than symptoms of vulnerability?

Providing separate relief distribution lines for women
Ensuring women's participation in disaster risk governance and decision-making✔️
Offering gender-specific emergency supplies
Creating women-only evacuation centers

Correct Answer Logic:

Section 13.1 emphasizes equal representation in DRR decision-making processes. While targeted relief measures are important, systemic gender equity in governance addresses the root causes of vulnerability by ensuring women's perspectives shape policies, resource allocation, and risk reduction strategies.

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Pakistan Affairs QUESTION #137

Question 10

The Geneva Accords were signed on:

14th May, 1988
14th April, 1988✔️
14th June, 1988
14th July, 1988

Correct Answer Logic:

The Geneva Accords, settling the situation relating to Afghanistan, were signed on April 14, 1988.

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General Knowledge QUESTION #2618

Question 11

The Power Supply Unit (PSU) in a computer serves what purpose?

It stores excess data when RAM is full
It converts electricity from the wall outlet into a format that the computer can use✔️
It manages the speed of the CPU clock cycles
It connects external devices like keyboards and monitors to the motherboard

Correct Answer Logic:

The power supply converts electricity from our wall outlet (AC power) into a format (DC power at various voltages) that our computer can use. Without it, no component in the computer would receive the power it needs to function.

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Physics QUESTION #7333

Question 12

A particle starts from the origin (0, 0) and moves in a straight line. At a later time its position is $(\sqrt{3},\,3)$. The angle the path makes with the positive $x$-axis is:

$0°$
$30°$
$45°$
$60°$✔️

Correct Answer Logic:

$\tan\alpha = \dfrac{y}{x} = \dfrac{3}{\sqrt{3}} = \sqrt{3}$

$\alpha = \tan^{-1}(\sqrt{3}) = \mathbf{60°}$

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Mathematics QUESTION #7437

Question 13

The function $f: \mathbb{R} \to [-\frac{1}{2}, \frac{1}{2}]$ defined as $f(x) = \frac{x}{1+x^2}$, is:

Invertible✔️
injective but not surjective
surjective but not injective
neither injective nor surjective

Correct Answer Logic:

To check injectivity: if $f(x_1) = f(x_2)$, then $\frac{x_1}{1+x_1^2} = \frac{x_2}{1+x_2^2}$, which leads to $x_1(1+x_2^2) = x_2(1+x_1^2)$, simplifying to $x_1 - x_2 + x_1x_2^2 - x_2x_1^2 = 0$, or $(x_1-x_2)(1-x_1x_2) = 0$. For most real values this gives $x_1 = x_2$, confirming injectivity. For surjectivity, $f'(x) = \frac{1-x^2}{(1+x^2)^2}$. Maximum occurs at $x=1$ giving $f(1)=\frac{1}{2}$ and minimum at $x=-1$ giving $f(-1)=-\frac{1}{2}$. The range is exactly $[-\frac{1}{2}, \frac{1}{2}]$, confirming surjectivity. Therefore, f is bijective and hence invertible.

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Urdu QUESTION #5240

Question 14

خوش تہ گام کی ترکیب کیا ہے؟

مبارک قدم✔️
مخصوص قدم
تیز قدم
سست قدم

Correct Answer Logic:

خوش تہ گام کا مطلب ہے مبارک قدم یعنی خوش قسمت قدم جس کا آنا بابرکت ہو۔

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General Abilities QUESTION #2808

Question 15

What is the value of $(-3)^4 - (-2)^3$?

73
89✔️
81
89

Correct Answer Logic:

$(-3)^4 = 81$ (positive, since even exponent) and $(-2)^3 = -8$ (negative, since odd exponent). So $81 - (-8) = 81 + 8 = 89$.

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Administration QUESTION #2930

Question 16

What is the primary role of the "Public Service Commission" in Pakistan?

Funding projects
Ensuring merit-based recruitment✔️
Policing the districts
Drafting foreign policy

Correct Answer Logic:

Commissions like the FPSC are constitutional bodies tasked with conducting competitive exams to recruit civil servants based on merit.

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Therapeutics and Patient Care QUESTION #3867

Question 17

Following the primary tetanus toxoid immunisation series, how frequently should booster doses be administered in healthy adults?

Every 2 years
Every 3 years
Every 5 years
Every 10 years✔️

Correct Answer Logic:

Tetanus booster injections are recommended every 10 years after completion of the primary immunisation schedule.

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Physics QUESTION #1066

Question 18

A water tank with wall at $x=L$, liquid of surface tension $S$ and density $\rho$. Liquid surface height $y(x)$ satisfies which equation? (Given $\theta(x)\approx\tan\theta=\frac{dy}{dx}$):

d²y/dx² = √(ρg/S)
dy/dx = √(ρg/S)·x
d²y/dx² = (ρg/S)x
d²y/dx² = (ρg/S)y✔️

Correct Answer Logic:

The meniscus shape is governed by the balance between surface tension (curvature force) and hydrostatic pressure. The capillary equation gives: $\frac{d^2y}{dx^2} = \frac{\rho g}{S}y$. This is the standard capillary length equation where the curvature $\approx d^2y/dx^2$ for small angles equals $\rho g y/S$.

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