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Math Physics Chemistry Biology QUESTION #4289

The joints which cause rotational movements are:

Hinge
Ball and Socket✔️
Cartilage
Sutures

Correct Answer Logic:

Ball and socket joints (e.g., hip and shoulder) allow movement in multiple planes including rotation, giving the greatest range of motion of all joint types.

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Chemistry QUESTION #7372

Question 1802

A magnetic moment of 2.83 BM is exhibited by which of the following ions? (At. nos: Ti = 22, Cr = 24, Mn = 25, Ni = 28)

$\text{Ti}^{3+}$
$\text{Ni}^{2+}$✔️
$\text{Cr}^{3+}$
$\text{Mn}^{2+}$

Correct Answer Logic:

Formula: $\mu = \sqrt{n(n+2)}$ BM, where $n$ = number of unpaired electrons.

For $\mu = 2.83$ BM: $2.83 = \sqrt{n(n+2)}$ → $n = 2$

Checking $\text{Ni}^{2+}$: Ni (Z=28) = [Ar] 3d⁸ 4s². $\text{Ni}^{2+}$ = [Ar] 3d⁸ → 2 unpaired electrons → $\mu = \sqrt{2 \times 4} = \sqrt{8} \approx 2.83$ BM ✓

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Physics QUESTION #7025

Question 1803

Two coherent waves interfere, resulting in a ratio of maximum to minimum intensity of $16$. Determine the ratio of the individual wave intensities.

$16 : 9$
$25 : 9$✔️
$4 : 1$
$5 : 3$

Correct Answer Logic:

$\frac{I_{max}}{I_{min}} = \left( \frac{a_1 + a_2}{a_1 - a_2} \right)^2 = 16 \implies \frac{a_1 + a_2}{a_1 - a_2} = 4$.

$a_1 + a_2 = 4a_1 - 4a_2 \implies 5a_2 = 3a_1 \implies \frac{a_1}{a_2} = \frac{5}{3}$.

Intensity ratio $\frac{I_1}{I_2} = \left( \frac{a_1}{a_2} \right)^2 = \frac{25}{9}$.

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Physics QUESTION #377

Question 1804

The vertical velocity of ball thrown upward __________ with time.

Decreases linearly
Remains constant
Doubles✔️
Decreases parabolically

Correct Answer Logic:

Due to constant gravitational acceleration, velocity decreases linearly

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Pakistan Affairs QUESTION #9101

Question 1805

Lake Manchar, the largest lake in Pakistan, is located in which district?

Kaghan
Swat
Dadu✔️
Lasbela

Correct Answer Logic:

Lake Manchar is in Dadu district, Sindh.

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Egnlish QUESTION #663

Question 1806

"Why I Am Not a Christian" is an essay by:

Bertrand Russell✔️
T. S. Eliot
Ralph Waldo Emerson
George Orwell

Correct Answer Logic:

This influential essay was based on a talk given by Russell in 1927.

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Verbal Reasoning QUESTION #8083

Question 1807

Of the following, which is closest to $\sqrt[3]{30}$?

$6$
$5$
$4$
$3$✔️

Correct Answer Logic:

Estimate by testing perfect cubes:

$2^3 = 8$
$3^3 = 27$
$4^3 = 64$

Since $27 < 30 < 64$, we know $3 < \sqrt[3]{30} < 4$.

$30$ is much closer to $27$ than to $64$, so $\sqrt[3]{30}$ is closer to $3$ than to $4$.

More precisely: $\sqrt[3]{30} \approx 3.107$

Among the options $\{6, 5, 4, 3\}$, the value $3$ is closest.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3335

Question 1808

'Agglutination' is a reaction where:

Bacteria explode
Antibodies cause antigens (like bacteria) to clump together✔️
Bacteria turn blue
DNA is destroyed

Correct Answer Logic:

Agglutination tests are used for blood typing and identifying pathogens.

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Planning QUESTION #4943

Question 1809

What is the recommended width for a two-way residential street?

4-5 meters
6-7 meters✔️
8-9 meters
10-12 meters

Correct Answer Logic:

A two-way residential street typically requires 6-7 meters width to accommodate two lanes of traffic (approximately 3-3.5 meters each) while maintaining safety and comfortable passing clearance.

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CISA QUESTION #1761

Question 1810

Why is change control fundamentally a governance issue?

Proper change control reduces the need for separate test and production environments
Change control increases the overall trust factor
It allows administrators to be granted more authority, saving management time
It enforces separation of duties by requiring agreement from at least two individuals✔️

Correct Answer Logic:

Change control is a governance foundation because it reduces questionable decisions, eliminates waste on low-value tasks, and mitigates risk. Critically, it enforces separation of duties — ensuring that no single person can unilaterally approve and implement a change.

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Civil Engineering QUESTION #2120

Question 1811

The degree of static indeterminacy of a propped cantilever beam (fixed at one end, simply supported at other end, single span) is:

1✔️
2
3

Correct Answer Logic:

A propped cantilever has reactions: fixed end provides vertical reaction, horizontal reaction, and moment (3 unknowns); simple support provides vertical reaction (1 unknown) — total 4 unknowns. Available equilibrium equations: 3 ($\sum F_x = 0$, $\sum F_y = 0$, $\sum M = 0$). Degree of static indeterminacy $= 4 - 3 = 1$. One compatibility equation (typically zero deflection at the prop) is needed to solve it.

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Math (Module-1) QUESTION #5467

Question 1812

What is the equation of the line shown in the graph (a line with a negative slope crossing the $y$-axis at $-8$)?

$y = -2x - 8$
$y = x - 8$
$y = -x - 8$✔️
$y = 2x - 8$

Correct Answer Logic:

The line has a $y$-intercept of $-8$ and a slope of $-1$.

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English QUESTION #8375

Question 1813

Commence means:

Arrange
Understand
Try
Begin✔️

Correct Answer Logic:

Commence means to begin.

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Physics QUESTION #7314

Question 1814

A ball is dropped from rest at $t = 0$. After 6 s, another ball is thrown downward from the same point with speed $v$. Both balls meet at $t = 18\text{ s}$. Find $v$ ($g = 10\text{ m/s}^2$).

60 m/s
75 m/s✔️
55 m/s
40 m/s

Correct Answer Logic:

Ball 1 falls for 18 s: $h_1 = \dfrac{1}{2}(10)(18)^2 = 1620\text{ m}$

Ball 2 falls for $18 - 6 = 12\text{ s}$: $h_2 = 12v + \dfrac{1}{2}(10)(12)^2 = 12v + 720$

Setting $h_1 = h_2$: $12v + 720 = 1620 \Rightarrow 12v = 900 \Rightarrow v = \mathbf{75\text{ m/s}}$

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3467

Question 1815

'Maltose' is a disaccharide commonly known as:

Table sugar
Milk sugar
Malt sugar✔️
Fruit sugar

Correct Answer Logic:

It consists of two glucose molecules.

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Education QUESTION #6884

Question 1816

A classroom teacher discovers that a student who regularly disrupts class comes from a home with authoritarian parenting. According to classroom management research on bullying and family dynamics, which parenting style is LEAST likely to produce students who either bully or are victimized?

Permissive parenting, which fosters strong self-esteem through freedom
Passive parenting, which encourages independent problem-solving
Authoritative parenting, which builds self-determination within reasonable boundaries✔️
Laissez-faire parenting, which models flexible and adaptable behavior

Correct Answer Logic:

Research indicates that children from homes with authoritative parenting — where warmth and firm but reasonable boundaries coexist — are significantly less likely to be involved in bullying or victimization. Authoritarian and passive/permissive parenting are both associated with higher rates of bullying involvement, whether as bully or victim.

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General Knowledge QUESTION #8946

Question 1817

Which city has the world's largest subway system (by annual ridership)?

Tokyo
Shanghai✔️
Mexico City
New York

Correct Answer Logic:

Tokyo Metro has the highest annual ridership.

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MCQs Section QUESTION #4842

Question 1818

Pick the word nearly opposite in meaning to "DELETERIOUS"

Nourishing✔️
Injurious
Vital
Fatal

Correct Answer Logic:

Deleterious means harmful or damaging to health or wellbeing. Its antonym is 'nourishing,' which means providing nourishment and promoting health and growth.

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CISA QUESTION #1746

Question 1819

What term describes the decentralized control approach that allows individuals to make decisions based on their own judgment?

Executive
Discretionary✔️
Detailed
Mandatory

Correct Answer Logic:

Discretionary control is a decentralized method where someone makes decisions based on their own assessment rather than a formal centralized authority. Auditors should investigate who makes decisions and how, as this is often where control failures are found.

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English QUESTION #487

Question 1820

They did not guess how closely he had kept in touch with across the road.

did not
how closely
had kept in touch
with across✔️

Correct Answer Logic:

Error: 'with across' should be 'with those across'

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