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CSS MCQs

Civil Superior Services — Complete MCQ Bank

127 Questions
Exam Preparation Guide

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CSS is Pakistan’s premier federal competitive examination. Strong preparation requires conceptual clarity, broad general knowledge and consistent practice across compulsory and optional areas.

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41
Physics Easy Uploaded: 06 Aug 2026

What is the term for an object floating in equilibrium where buoyant force equals its weight?

  • ANeutral buoyancy
  • BSinking
  • CDisplacement
  • DDensity equilibrium
42
Physics Hard Uploaded: 06 Aug 2026

Which phenomenon occurs when two or more waves overlap and combine?

  • AReflection
  • BInterference
  • CRefraction
  • DDiffraction
43
Physics Easy Uploaded: 06 Aug 2026

What is the term for the change in frequency of a wave due to relative motion between source and observer?

  • ADoppler effect
  • BReflection effect
  • CInterference effect
  • DResonance effect
44
Physics Easy Uploaded: 06 Aug 2026

Which type of radioactive decay involves the emission of a helium nucleus?

  • ABeta decay
  • BGamma decay
  • CNeutron emission
  • DAlpha decay
45
Physics Easy Uploaded: 06 Aug 2026

What is the term for the force per unit area exerted on a surface?

  • AForce
  • BEnergy
  • CWork
  • DPressure
46
Physics Easy Uploaded: 06 Aug 2026

Which law relates force, mass, and acceleration?

  • ANewton's First Law
  • BNewton's Second Law
  • CNewton's Third Law
  • DLaw of Gravitation
47
Physics Medium Uploaded: 06 Aug 2026

What is the term for the total distance an object travels around a circular path per unit time?

  • ALinear speed
  • BAngular speed
  • CTangential speed
  • DRotational speed
48
Physics Medium Uploaded: 06 Aug 2026

Which phenomenon causes a rainbow to form after rainfall?

  • AReflection only
  • BDiffraction only
  • CRefraction and dispersion
  • DPolarization
49
Physics Medium Uploaded: 06 Aug 2026

What is the term for the angle at which incident light strikes a reflective surface?

  • AAngle of reflection
  • BAngle of refraction
  • CAngle of incidence
  • DCritical angle
50
Physics Hard Uploaded: 06 Aug 2026

Which scientific instrument is used to measure the intensity of earthquakes?

  • ASeismograph
  • BBarometer
  • CAnemometer
  • DHygrometer