Reading Mode - Questions

Agronomy QUESTION #2056

The plant-available water capacity (PAWC) of a soil is correctly expressed as:

The moisture content at field capacity only
$PAWC = \theta_{FC} - \theta_{PWP}$, where $\theta_{FC}$ is volumetric water content at field capacity ($-33$ kPa) and $\theta_{PWP}$ is at permanent wilting point ($-1500$ kPa)✔️
The total porosity of the soil minus bulk density
The gravitational water fraction that drains within 48 hours of saturation

Correct Answer Logic:

PAWC represents the reservoir of water accessible to plant roots. It equals the difference in volumetric water content between field capacity (−33 kPa, where drainage becomes negligible) and permanent wilting point (−1500 kPa, where plants cannot extract water). Sandy soils have low PAWC; loam soils have the highest.

Uploaded by: Fani Warraich

Chemistry QUESTION #7112

Question 2622

In a galvanic cell represented by $Pt(s) | H_{2}(g, 1\text{ bar}) | HCl(aq) | AgCl(s) | Ag(s)$, the potential is $0.92\text{ V}$ at a specific concentration. If the standard reduction potential for the silver-silver chloride electrode is $0.22\text{ V}$, what is the $pH$ of the $HCl$ solution? (Assume $\frac{2.303RT}{F} = 0.06$)

$11.6$✔️
$10.5$
$9.4$
$12.1$

Correct Answer Logic:

The cell reaction is $\frac{1}{2}H_{2} + AgCl \rightarrow Ag + H^{+} + Cl^{-}$.
$E_{cell} = E^{0}_{cell} - 0.06 \log([H^{+}][Cl^{-}])$. Since $E^{0}_{H_{2}/H^{+}} = 0$, $E^{0}_{cell} = 0.22\text{ V}$.
$0.92 = 0.22 - 0.06 \log([H^{+}]^2)$ (assuming $[H^{+}] = [Cl^{-}]$).
$0.70 = -0.12 \log[H^{+}] = 0.12 \times pH$.
$pH = 0.70 / 0.06 \approx 11.6$.

Uploaded by: Fani Warraich

Physics and Math QUESTION #783

Question 2623

If $ax^2 + 2hxy + by^2 = 0$, their lines are orthogonal when:

$a + b = 0$✔️
$a - b = 0$
$a = b$
None

Correct Answer Logic:

For the pair of lines $ax^2 + 2hxy + by^2 = 0$ to be perpendicular, the sum of coefficients of $x^2$ and $y^2$ must be zero: $a + b = 0$.

Uploaded by: Fani Warraich

Education QUESTION #6774

Question 2624

A test developer wants to use the Split-Half method to estimate reliability. After splitting the test into odd and even items and correlating the halves, they get r = 0.70. However, this underestimates the reliability of the full test. Which formula corrects for this, and why is the correction necessary?

The KR-20 formula; because internal consistency must account for item difficulty
The Spearman-Brown prophecy formula; because reliability increases with test length, and the correlation between two halves reflects reliability of a test only half as long✔️
The inter-rater reliability coefficient; because two independent scorers are effectively two test halves
The KR-21 formula; because it handles non-dichotomous scoring

Correct Answer Logic:

Split-half reliability correlates two halves of the test, but a half-test is less reliable than the full test. The Spearman-Brown formula corrects for this by estimating the reliability of the full-length test from the split-half correlation. This is a fundamental principle: longer tests, all else equal, are more reliable because they sample the domain more broadly.

Uploaded by: Fani Warraich

Pakistan Affairs QUESTION #288

Question 2625

What was the key feature of the Mughal Rajput policy during their rule in India?

Forced conversion to Islam
Exclusion from administration
Complete annexation
Integration into the Mughal administration✔️

Correct Answer Logic:

Started by Akbar, this policy involved matrimonial alliances and high ranks (Mansabs) for Rajputs.+1

Uploaded by: Fani Warraich

Civil Procedure QUESTION #3685

Question 2626

A citizen of State A sues a corporation in federal court for $\text{\$500,000}$. The corporation is incorporated in State B and has its only manufacturing plant in State A, but its 'nerve center' (headquarters where officers direct activities) is in State B. The corporation moves to dismiss for lack of diversity. How should the court rule?

Grant the motion, because the plant is in State A, making the corporation a citizen of State A.
Grant the motion, because the amount in controversy must be proven with certainty at the pleading stage.
Deny the motion, because under the 'nerve center' test, the corporation is a citizen only of State B.✔️
Deny the motion, because a corporation is only a citizen of its state of incorporation.

Correct Answer Logic:

Under 28 U.S.C. $\S 1332(c)(1)$ and the Supreme Court's ruling in Hertz Corp. v. Friend, a corporation's principal place of business is its 'nerve center.' Since the nerve center and incorporation are in State B, and the plaintiff is in State A, complete diversity exists.

Uploaded by: Fani Warraich

Islamic Studies QUESTION #8251

Question 2627

Which Surah is called "Ummul Kitab"?

Al-Baqra
Al-Yasin
Al-Fateha✔️
Al-Rehman

Correct Answer Logic:

Surah Al-Fatiha is called 'Ummul Kitab' (Mother of the Book) and also 'Ummul Quran' (Mother of the Quran). It is the opening Surah of the Quran with 7 verses, also known as 'As-Sab'ul Mathani' (The Seven Oft-Repeated Verses). It is recited in every unit of prayer (Salah) and encompasses the essence of the entire Quran: praising Allah, seeking guidance, and asking for the straight path. The Prophet (PBUH) called it the greatest Surah in the Quran.

Uploaded by: Fani Warraich

The Constitution of Pakistan QUESTION #9376

Question 2628

Under Article 239(4), a constitutional amendment Bill altering provincial limits must be passed by the concerned Provincial Assembly by:

Simple majority
Two-thirds of its total membership✔️
Three-fourths of its total membership
Unanimous vote

Correct Answer Logic:

Article 239(4) provides that a Bill 'which would have the effect of altering the limits of a Province shall not be presented to the President for assent unless it has been passed by the Provincial Assembly of that Province by the votes of not less than two-thirds of its total membership.' This is an additional step beyond the normal two-thirds in both Houses.

Uploaded by: Fani Warraich

Biology QUESTION #7288

Question 2629

The common nitrogen-fixer in paddy fields is:

Frankia
Rhizobium
Azospirillum
Oscillatoria✔️

Correct Answer Logic:

Oscillatoria is a filamentous cyanobacterium that fixes atmospheric nitrogen in paddy (rice) fields and is widely used as a biofertiliser. Other cyanobacteria like Anabaena and Nostoc also fix nitrogen in paddy fields. Rhizobium is specific to legumes; Frankia to non-leguminous trees; Azospirillum is a free-living aerobic fixer associated with grasses.

Uploaded by: Fani Warraich

Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3366

Question 2630

'Coagulase' is an enzyme produced by *Staph. aureus* to:

Break down DNA
Clot blood plasma (hiding from the immune system)✔️
Move faster
Produce energy

Correct Answer Logic:

The clot provides a protective barrier for the bacteria.

Uploaded by: Fani Warraich

General Abilities QUESTION #3972

Question 2631

A timber plank measuring $35$ feet and $6$ inches in length is divided to create $4$ shelves of identical size. What is the length of each individual shelf?

$9$ feet, $1\frac{1}{2}$ inches✔️
$8$ feet, $10\frac{1}{2}$ inches
$7$ feet, $10\frac{1}{2}$ inches
$7$ feet, $1\frac{1}{2}$ inches

Correct Answer Logic:

1

Uploaded by: Fani Warraich

General Knowledge QUESTION #8630

Question 2632

How many scribes (writers) are recorded to have written the divine revelation (Wahee) during the Prophet's lifetime?

31
35
40✔️
42

Correct Answer Logic:

About 35 scribes are recorded for writing the Quranic revelation.

Uploaded by: Fani Warraich

Boilers Mechanical Engineering QUESTION #2536

Question 2633

A force $\mathbf{F} = 3\hat{i} + 4\hat{j}$ N acts at point $P(2,\,1,\,0)$ m. The moment vector about the origin is:

$5\hat{k}$ N·m✔️
$-5\hat{k}$ N·m
$8\hat{k}$ N·m
$2\hat{k}$ N·m

Correct Answer Logic:

Moment $\mathbf{M}=\mathbf{r}\times\mathbf{F}=(2\hat{i}+\hat{j})\times(3\hat{i}+4\hat{j})$. Cross product: $(2\cdot4-1\cdot3)\hat{k}=(8-3)\hat{k}=5\hat{k}$ N·m.

Uploaded by: Fani Warraich

English QUESTION #8580

Question 2634

What is the one-word substitution for a person who is unable to pay his debts?

Poor
Vegabond
Solvent
Insolvent✔️

Correct Answer Logic:

Insolvent means unable to pay debts.

Uploaded by: Fani Warraich

Civil Procedure QUESTION #3740

Question 2635

Which of the following is considered 'Non-Hearsay' (Hearsay Exemptions) under the Federal Rules?

A dying declaration.
An admission by a party-opponent.✔️
A statement made for medical diagnosis.
A business record.

Correct Answer Logic:

Rule 801(d) lists statements that are 'not hearsay,' which include prior statements by a witness and statements made by an opposing party (admissions).

Uploaded by: Fani Warraich

Administration QUESTION #2933

Question 2636

Within the "Six Sigma" methodology, what is the primary objective of the "Improve" phase?

Identifying the root causes of existing defects
Implementing and verifying solutions to address problems✔️
Establishing baseline performance metrics
None of these

Correct Answer Logic:

In the DMAIC process, the 'Improve' phase is dedicated to developing, testing, and implementing solutions to eliminate the root causes of defects.

Uploaded by: Fani Warraich

Ability / HR / Governance / Special Education QUESTION #1901

Question 2637

Under Rule 6-A(2) before the authority passes a revision order adverse to the accused what mandatory opportunity must be provided?

Only written notice
Written notice of grounds AND opportunity to show cause including personal hearing if requested or necessary in the interest of justice✔️
Only an opportunity to file written reply without personal hearing
Summary disposal without any opportunity

Correct Answer Logic:

Rule 6-A(2) mandates that the accused must be informed in writing of grounds AND given opportunity to show cause including personal hearing if requested or otherwise necessary — subject only to the security of Pakistan exception.

Uploaded by: Fani Warraich

Pharmacology and Toxicology QUESTION #3858

Question 2638

Which of the following agents does NOT have antiemetic properties?

Chlorpromazine
Domperidone
Oxybutynin✔️
Metoclopramide

Correct Answer Logic:

Oxybutynin is an anticholinergic agent used for urinary incontinence and has no antiemetic role. Chlorpromazine, domperidone, and metoclopramide are all recognised antiemetics.

Uploaded by: Fani Warraich