Reading Mode - Questions

Mechanical Engineering QUESTION #2375

The transfer function $Y(s)$ of a linear control system is defined as:

The ratio of the output signal to the input signal in the time domain
The ratio of the Laplace transform of the output $X_o(s)$ to the Laplace transform of the input $X_i(s)$, with all initial conditions equal to zero✔️
The differential equation describing the system
The frequency response of the system

Correct Answer Logic:

The transfer function: $Y(s) = X_o(s)/X_i(s)$ with zero initial conditions. It is defined only for linear, constant-parameter systems. It relates input and output in the Laplace (s) domain.

Uploaded by: Fani Warraich

Basic Mathematics QUESTION #4636

Question 5542

What is $\frac{3^4}{3^2}$?

$3^2$✔️
$3^6$
$3^8$
$1$

Correct Answer Logic:

$\frac{3^4}{3^2} = 3^{4-2} = 3^2 = 9$

Uploaded by: Fani Warraich

Computer Science QUESTION #1146

Question 5543

What does the 'A' in ACID properties of a database stand for?

Availability
Atomicity✔️
Authentication
Accuracy

Correct Answer Logic:

Atomicity ensures that a transaction is treated as a single "unit," which either succeeds completely or fails completely.

Uploaded by: Fani Warraich

Therapeutics and Patient Care QUESTION #3903

Question 5544

What is the standard initial daily starting dose for venlafaxine when initiating treatment for depression or anxiety?

$37.5$ mg daily
$150$ mg daily
$75$ mg daily✔️
$300$ mg daily

Correct Answer Logic:

Venlafaxine is typically initiated at $75$ mg per day ($37.5$ mg twice daily or $75$ mg XR once daily) and titrated as needed up to a maximum of $375$ mg/day.

Uploaded by: Fani Warraich

Biology QUESTION #4268

Question 5545

Which component of a reflex arc connects the sensory neuron to the motor neuron within the spinal cord?

Receptor
Effector
Muscle fiber
Associative neuron✔️

Correct Answer Logic:

The associative neuron (interneuron) is located in the spinal cord and connects the sensory (afferent) neuron to the motor (efferent) neuron in a reflex arc.

Uploaded by: Fani Warraich

Civil Procedure QUESTION #5672

Question 5546

A plaintiff files a complaint and the defendant is served. The defendant files a Rule 12(b)(6) motion to dismiss, which the court denies. The defendant then files an answer 10 days later. Is the answer timely under Rule 12(a)(4)?

Yes, because the defendant has 21 days from the denial of the motion.
No, the defendant should have filed the answer within 14 days of the notice of the court's action.
Yes, the answer is timely because it was filed within 14 days of the notice of the court's action.✔️
No, the filing of a motion does not stay the time to answer.

Correct Answer Logic:

Rule 12(a)(4)(A) states that if the court denies a motion or postpones its disposition until trial, the responsive pleading must be served within 14 days after notice of the court's action.

Uploaded by: Fani Warraich

Economics QUESTION #1710

Question 5547

According to the World Bank's income classification using GNI per capita (Atlas method), Pakistan is currently placed in which income category?

Low-income developing economy
Upper-middle-income economy
Lower-middle-income developing economy✔️
None of these

Correct Answer Logic:

The World Bank classifies Pakistan as a lower-middle-income country (LMIC). As of recent classifications, Pakistan's GNI per capita falls within the lower-middle-income range (approximately USD 1,136–4,465). It is above the low-income threshold but well below the upper-middle-income threshold. This classification affects Pakistan's access to concessional lending (IDA blend status) and its obligations under various international agreements.

Uploaded by: Fani Warraich

Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3514

Question 5548

What is the biological source of 'Turmeric' (Haldi)?

Curcuma longa✔️
Zingiber officinale
Crocus sativus
Allium sativum

Correct Answer Logic:

Turmeric comes from the rhizomes of Curcuma longa.

Uploaded by: Fani Warraich

City and Regional Planning QUESTION #4916

Question 5549

In transportation planning, what does TAZ stand for?

Traffic Analysis Zones✔️
Transport Assessment Zones
Topographical Area Zones
Transit Accessibility Zones

Correct Answer Logic:

TAZ (Traffic Analysis Zones) are fundamental units used in transportation planning to divide a study area into homogeneous zones for analyzing travel patterns and trip generation.

Uploaded by: Fani Warraich

General Knowledge QUESTION #2611

Question 5550

The full form of PDA in computing history stands for:

Portable Data Analyzer
Personal Digital Assistant✔️
Programmable Data Array
Private Digital Access

Correct Answer Logic:

PDA stands for Personal Digital Assistant. It was a handheld computing device that allowed computing to go mobile, combining features like a calendar, contacts, notes, and later email and internet — paving the way for modern smartphones.

Uploaded by: Fani Warraich

Mathematics QUESTION #6034

Question 5551

Find the set $K$ of all real $x$ where $f(x)=\sin|x|-|x|+2(x-\pi)\cos|x|$ is not differentiable.

$\emptyset$ (empty set)✔️
$\{\pi\}$
$\{0\}$
$\{0,\pi\}$

Correct Answer Logic:

Check $x=0$: Write $h(x)=\sin|x|-|x|$. For $x>0$: $h(x)=\sin x-x$, $h'(x)=\cos x-1$. For $x<0$: $h(x)=-\sin x+x$, $h'(x)=-\cos x+1$. At $x=0$: left limit $=0$, right limit $=0$ — differentiable.

The term $2(x-\pi)\cos|x|$ is clearly differentiable everywhere (product of smooth functions, since $\cos|x|$ is even and smooth).

At $x=\pi$: $\cos|\pi|=\cos\pi=-1$, and all parts are smooth for $x>0$.

Therefore $f$ is differentiable everywhere and $K=\boldsymbol{\emptyset}$.

Uploaded by: Fani Warraich

Chemistry QUESTION #453

Question 5552

Which element has the largest number of allotropic forms?

Phosphorous✔️
Sulphur
Oxygen
Both A & C

Correct Answer Logic:

Phosphorus has many allotropes (white, red, black, etc.)

Uploaded by: Fani Warraich

Chemistry QUESTION #1446

Question 5553

Which reaction involves the conversion of aldehydes into alcohols?

Oxidation
Reduction✔️
Hydrolysis
None of these

Correct Answer Logic:

Aldehydes ($RCHO$) are converted to primary alcohols ($RCH_2OH$) by reduction — adding hydrogen across the $C=O$ bond. Common reducing agents include $\text{NaBH}_4$ (sodium borohydride) and $\text{LiAlH}_4$ (lithium aluminium hydride). Oxidation of aldehydes gives carboxylic acids, not alcohols. Hydrolysis is for esters, amides, etc.

Uploaded by: Fani Warraich

Physics QUESTION #1061

Question 5554

An unpolarized light beam is incident on medium of refractive index 1.73 at Brewster's angle. Then:

Both reflected and transmitted light are perfectly polarized at 60° and 30°
Transmitted light is completely polarized with refraction angle close to 30°
Reflected light is completely polarized and angle of reflection is close to 60°✔️
Reflected light is partially polarized and angle of reflection is close to 30°

Correct Answer Logic:

Brewster's angle: $\tan\theta_B=n=1.73\approx\sqrt{3}\Rightarrow\theta_B=60°$. At Brewster's angle, reflected light is completely polarized (in the plane perpendicular to incidence). Angle of reflection $=60°$. Transmitted light is partially polarized (not completely). Answer: option (3).

Uploaded by: Fani Warraich

General Ability and Fire Fighting QUESTION #5615

Question 5555

Which of the following agents is best suited for a Class A fire?

CO2
Foam
Water✔️
Dry Powder

Correct Answer Logic:

Water is the most common and effective agent for Class A fires because it cools the ordinary combustibles (wood

Uploaded by: Fani Warraich

Accounting Finance and Punjab Sales Tax on Services QUESTION #2569

Question 5556

Under section 16B(1), input tax adjustment is NOT allowed in respect of capital goods (plant, machinery, equipment) that are:

Fully depreciated
Not exclusively useable or used in providing taxable services✔️
Imported rather than locally purchased
Older than five years

Correct Answer Logic:

Section 16B(1)(a) prohibits input tax adjustment in respect of capital goods (plant, machinery, equipment and others) NOT EXCLUSIVELY USEABLE OR USED in providing taxable services — partial use does not qualify.

Uploaded by: Fani Warraich

Mechanical Engineering QUESTION #2456

Question 5557

The torque $T_r$ required to raise a load $F$ with a square-threaded power screw (pitch diameter $d_m$, lead $l$, friction $\mu$) is:

$T_r = \frac{Fd_m}{2}\left(\frac{l - \pi\mu d_m}{\pi d_m + \mu l}\right)$
$T_r = \frac{Fd_m}{2}\left(\frac{l + \pi\mu d_m}{\pi d_m - \mu l}\right)$✔️
$T_r = \frac{F l}{2\pi}$
$T_r = \mu F d_m$

Correct Answer Logic:

From force equilibrium on the unrolled thread diagram for raising: $T_r = \frac{Fd_m}{2}\cdot\frac{l+\pi\mu d_m}{\pi d_m - \mu l}$. The ideal torque (no friction, $\mu=0$) is $T_0=Fl/(2\pi)$, and screw efficiency $e=T_0/T_r=Fl/(2\pi T_r)$.

Uploaded by: Fani Warraich

Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3521

Question 5558

'Anaphylaxis' is:

A mild skin rash
A severe, potentially life-threatening systemic allergic reaction✔️
A type of plant
A medicine

Correct Answer Logic:

Anaphylactic shock requires immediate medical attention (usually Epinephrine).

Uploaded by: Fani Warraich

Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3075

Question 5559

Which cavity contains the lungs and the heart?

Abdominal cavity
Thoracic cavity✔️
Pelvic cavity
Cranial cavity

Correct Answer Logic:

The thoracic cavity is protected by the rib cage and contains the primary organs of the cardiovascular and respiratory systems.

Uploaded by: Fani Warraich

Agronomy QUESTION #2060

Question 5560

A lysimeter is used in agronomy primarily to:

Measure soil electrical conductivity to assess salinity
Directly measure actual evapotranspiration ($ET_a$) or drainage losses from an isolated soil-plant system under field conditions by monitoring changes in soil water mass or volume✔️
Measure the rate of nitrogen leaching from surface-applied urea
Determine the cation exchange capacity of soil in situ

Correct Answer Logic:

A lysimeter is an isolated soil block (weighing or drainage type) in which water inputs (rainfall, irrigation) and outputs (drainage, ET) are precisely measured. Weighing lysimeters detect changes in mass (converted to ET). They provide the most direct measurement of ET under actual crop conditions and are used to calibrate ET estimation equations.

Uploaded by: Fani Warraich

More Options

Suggest a Question