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Physics QUESTION #1164

In which process is all the heat supplied converted into work done?

Isothermal✔️
Isochoric
Isobaric
Isentropic

Correct Answer Logic:

In a reversible isothermal process (constant temperature) for an ideal gas, the internal energy change $\Delta U = 0$ (since $U$ depends only on temperature). By the first law: $Q = \Delta U + W = W$. So all heat supplied is entirely converted to work done.

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English QUESTION #2659

Question 762

Convert to indirect: 'He said, "What a beautiful scene!"'

He said that it was a beautiful scene.
He exclaimed that it was a very beautiful scene.✔️
He exclaimed what a beautiful scene it was.
He said what a beautiful scene.

Correct Answer Logic:

Exclamatory sentences use 'exclaimed with joy/wonder' and change 'What a...' to 'very'.

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Civil Engineering QUESTION #6583

Question 763

The dry density of a moist soil sample in relation to its bulk density is:

Greater than the bulk density
Equal to the bulk density
Less than the bulk density✔️
No specific relationship exists

Correct Answer Logic:

Bulk density $\rho_b = \dfrac{M_{total}}{V}$ includes the mass of water. Dry density $\rho_d = \dfrac{M_{solids}}{V}$. Since $M_{total} > M_{solids}$, dry density is always less than bulk density for any moist soil.

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Security Measures to Maintain Law and Order QUESTION #850

Question 764

Under the "Form of Affirmation," an ASF officer swears to serve with "honesty and faithfulness." Violation of this for personal gain constitutes:

Administrative error
Breach of Oath✔️
Minor misconduct
Professional oversight

Correct Answer Logic:

The First Schedule (Oath) is a legal commitment; violating it via corruption or dishonesty is a fundamental breach of service law.

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Nursing QUESTION #9224

Question 765

A patient in the ICU has the following arterial blood gas (ABG) results: $\text{pH} = 7.28$, $\text{PaCO}_2 = 55 \text{ mmHg}$, $\text{HCO}_3^- = 24 \text{ mEq/L}$, $\text{PaO}_2 = 70 \text{ mmHg}$. Which acid-base disorder is present?

Metabolic acidosis with respiratory compensation
Respiratory acidosis — uncompensated✔️
Metabolic alkalosis with respiratory compensation
Mixed respiratory and metabolic alkalosis

Correct Answer Logic:

Correct Answer: B — Respiratory acidosis, uncompensated

Step-by-step ABG interpretation:

pH: $7.28 < 7.35$ → Acidosis
PaCO$_2$: $55 > 45 \text{ mmHg}$ → Respiratory cause (CO$_2$ is an acid; elevated = acidosis)
HCO$_3^-$: $24 \text{ mEq/L}$ → Normal (22–26 mEq/L) → No metabolic compensation yet

Conclusion: Respiratory acidosis — uncompensated (because HCO$_3^-$ is still normal, kidneys have not yet retained bicarbonate).

Normal ABG Reference Values:

Parameter	Normal Range
pH	$7.35 - 7.45$
PaCO$_2$	$35 - 45 \text{ mmHg}$
HCO$_3^-$	$22 - 26 \text{ mEq/L}$
PaO$_2$	$80 - 100 \text{ mmHg}$
SaO$_2$	$95 - 100\%$

Common causes in ICU: COPD exacerbation, oversedation, neuromuscular disease, pneumothorax.

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Boilers Mechanical Engineering QUESTION #2453

Question 766

The general solution for forced damped vibration $x=x_1+x_2$ consists of:

Only the steady-state component $x_2=B_2\sin(pt-\phi)$
Transient free-damped oscillation $x_1=B_1e^{-\alpha t}\sin(\omega_d t+\psi)$ PLUS steady-state harmonic $x_2=B_2\sin(pt-\phi)$✔️
Only the transient component that decays to zero
A constant DC offset plus a harmonic

Correct Answer Logic:

The complete solution is $x=x_1+x_2$: the transient part $x_1=B_1e^{-\alpha t}\sin(\omega_d t+\psi)$ decays with time; the steady-state part $x_2=B_2\sin(pt-\phi)$ persists indefinitely.

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Maths QUESTION #4585

Question 767

If average of $6$ numbers is $15$ and one number is removed, average becomes $14$. What number was removed?

$20$✔️
$6$
$14$
$15$

Correct Answer Logic:

Original sum = $6 \times 15 = 90$. New sum = $5 \times 14 = 70$. Removed = $90 - 70 = 20$

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Accounting & Finance QUESTION #6085

Question 768

In the absence of a formal partnership agreement, which of the following rules apply under standard partnership law?

Partners receive 10% interest per annum on loans to the business.
Partners receive 5% interest per annum on their capital.
No interest is charged on partners' drawings.
Partners are not entitled to a salary.

1 and 3
1 and 4
2 and 3
3 and 4✔️

Correct Answer Logic:

Under the UK Partnership Act 1890 (often used as the basis for these exams), if no agreement exists: no interest on capital, no salaries, no interest on drawings, and interest on partner loans is usually 5% (not 10%). Thus, only 3 and 4 are correct.

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General Knowledge QUESTION #11498

Question 769

When manually inserting code field brackets in MS Word, press:

Ctrl + F6
Ctrl + F9✔️
Alt + F11
Shift + F12

Correct Answer Logic:

Ctrl + F9 inserts a pair of field code braces { } in MS Word — these are special characters that cannot be typed directly from the keyboard. You then type the field code between the braces. F9 updates all field codes; Alt+F9 toggles between showing field codes and their results.

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English QUESTION #7639

Question 770

Change the narration: He said, "May I open the window? It's rather hot in here."

He said might he open the window. It was rather hot in there.
He asked if he might open the window. He mentioned it was rather hot in there.✔️
He asked if he might open the window as it was rather hot in there?
None of these

Correct Answer Logic:

When converting direct speech requesting permission to indirect speech, 'may' changes to 'might', and the reporting verb 'said' changes to 'asked'. The statement about temperature is reported separately using 'mentioned' or 'said'. Both parts need to be connected appropriately.

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Education QUESTION #10878

Question 771

To maintain greater interest and attention among students in class, a teacher should:

Use the blackboard
Use pictures
Tell stories
Ask questions✔️

Correct Answer Logic:

Asking questions is the most effective classroom technique for maintaining student interest and attention. Questions require active cognitive engagement, create intellectual challenge, check understanding, promote thinking, and involve all students. Effective questioning through Socratic dialogue keeps students mentally alert throughout a lesson. While other methods (pictures, stories, blackboard) also engage students, questioning is the most direct, interactive, and universally effective technique for sustained attention.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3408

Question 772

'ATP' is often called the 'Energy Currency' of the cell because energy is stored in its:

Nitrogenous base
High-energy phosphate bonds✔️
Ribose sugar
Oxygen atoms

Correct Answer Logic:

Breaking the phosphate bond releases energy for cellular work.

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Security Measures to Maintain Law and Order QUESTION #906

Question 773

A person is found filming "Sensitive Installations." An AD ASF can seize the camera under the authority of:

Section 6
Section 7✔️
Section 9
Section 10

Correct Answer Logic:

Section 7(1) allows the search and seizure of items from persons suspected of jeopardizing the safety of the aerodrome.

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Chemistry QUESTION #4338

Question 774

The IUPAC name of $(CH_3)_3CCH_2Br$ is:

1-bromopentane
1-bromo-2,2-trimethylethane
1-bromo-2,2-dimethylpropane✔️
2-bromopentane

Correct Answer Logic:

The parent chain has 3 carbons (propane). There are two methyl groups on carbon 2, and a bromo group on carbon 1. IUPAC name: 1-bromo-2,2-dimethylpropane.

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FIA Act QUESTION #9974

Question 775

Section 5-A was introduced into the FIA Act through:

The original 1974 enactment
FIA (Amendment) Ordinance, 2002✔️
A Supreme Court judgment
Police Order, 2002

Correct Answer Logic:

Section 5-A was added through the FIA (Amendment) Ordinance 2002.

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Aptitude QUESTION #10934

Question 776

Which Indian architect won the Pritzker Architecture Prize (the Nobel Prize of Architecture) in 2018?

Charles Correa
Raj Rewal
Balkrishna Doshi✔️
Hafeez Contractor

Correct Answer Logic:

Balkrishna Doshi (B.V. Doshi) was awarded the Pritzker Architecture Prize in 2018 — the first Indian architect to receive this honour.

Known for: Aranya Community Housing (Indore), CEPT University (Ahmedabad), Sangath (his own studio).
He was a student/collaborator of both Le Corbusier and Louis Kahn.
He passed away in January 2023.

Charles Correa received the Pritzker in 2022 (posthumous? — No, the 2022 prize went to Diébédo Francis Kéré). Correa never received the Pritzker.

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Biology Zoology Botany QUESTION #1359

Question 777

Plants that grow under direct sunlight are known as:

Heliophytes✔️
Sciophytes
Psamophytes
Dicots

Correct Answer Logic:

Heliophytes (sun plants) are plants adapted to grow in full, direct sunlight. They have structural adaptations such as smaller, thicker leaves with more palisade mesophyll layers and higher chlorophyll content to optimise photosynthesis in high-light conditions. Sciophytes are shade-tolerant plants; psamophytes grow in sandy soil environments.

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Home Economics QUESTION #6257

Question 778

Residential design focusing on the 'Work Triangle' is primarily applied in which room?

Bedroom
Living Room
Kitchen✔️
Bathroom

Correct Answer Logic:

The kitchen work triangle connects the sink, stove, and refrigerator for efficiency.

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Mathematics QUESTION #6947

Question 779

Let $A=\begin{pmatrix}i&-i\\-i&i\end{pmatrix}$ where $i=\sqrt{-1}$. The system $A^8\begin{pmatrix}x\\y\end{pmatrix}=\begin{pmatrix}8\\64\end{pmatrix}$ has:

Exactly two solutions
No solution✔️
A unique solution
Infinitely many solutions

Correct Answer Logic:

$A = \begin{pmatrix}i&-i\\-i&i\end{pmatrix}$. Note $\det(A) = i^2-i^2=0$, so $A$ is singular.

$A^2$: compute $(A)^2$. Row1·Col1: $i(i)+(-i)(-i)=-1+(-1)=-2i$... Let's compute: $A^2_{11}=i\cdot i+(-i)(-i)=i^2+i^2=-1-1=-2$. So $A^2 = -2A$... check: $A^2 = -2\begin{pmatrix}i&-i\\-i&i\end{pmatrix}$.

Therefore $A^8 = (-2)^4 A^4 = 16(A^2)^2=16\cdot4A^2=64\cdot(-2A)=-128A$.

Wait: $A^2=-2A \Rightarrow A^4=4A^2=-8A \Rightarrow A^8=-8A^4... $ Correctly: $A^8=(-2)^7A = -128A$.

$-128A\begin{pmatrix}x\\y\end{pmatrix}=\begin{pmatrix}8\\64\end{pmatrix}$. Since $\det(A)=0$, check consistency. The equations are linearly dependent but RHS $(8,64)$ is not in column space of $A$. Hence no solution.

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Ability / HR / Governance / Special Education QUESTION #1898

Question 780

Under the proviso to Rule 5(1)(iii) the opportunity to show cause can be denied in what specific circumstance?

When the accused is abroad
When the accused has a previous conviction
In the interest of the security of Pakistan or any part thereof where the authority is satisfied it is not expedient✔️
When an Inquiry Committee has already been constituted

Correct Answer Logic:

The proviso to Rule 5(1)(iii) allows denial of show cause opportunity only when the authority is satisfied that in the interest of security of Pakistan it is not expedient to give such opportunity.

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Parameter	Normal Range
pH	\(7.35 - 7.45\)
PaCO\(_2\)	\(35 - 45 \text{ mmHg}\)
HCO\(_3^-\)	\(22 - 26 \text{ mEq/L}\)
PaO\(_2\)	\(80 - 100 \text{ mmHg}\)
SaO\(_2\)	\(95 - 100\%\)

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