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CSS MCQs

Civil Superior Services — Complete MCQ Bank

127 Questions
Exam Preparation Guide

How to prepare for CSS

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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Combine daily MCQ practice with analytical reading, vocabulary building and regular revision of national and international affairs.
CSS preparation illustration
1
Physics Medium Uploaded: 17 Aug 2026

Doping a semiconductor involves:

  • ACooling it to absolute zero
  • BRemoving all impurities
  • CAdding impurities to alter its conductivity
  • DHeating it to extreme temperatures
2
Physics Medium Uploaded: 17 Aug 2026

A rectifier is used to convert:

  • ACurrent to resistance
  • BVoltage to current
  • CDC to AC
  • DAC to DC
3
Physics Easy Uploaded: 17 Aug 2026

A diode allows current to flow in:

  • AA direction determined by voltage frequency
  • BNeither direction
  • CBoth directions equally
  • DOnly one direction
4
Physics Hard Uploaded: 17 Aug 2026

Which of the following has the highest penetrating power?

  • ASound waves
  • BAlpha particles
  • CBeta particles
  • DGamma rays
5
Physics Medium Uploaded: 17 Aug 2026

Nuclear reactors typically use which element as fuel?

  • ACarbon
  • BHydrogen
  • CUranium
  • DOxygen
6
Physics Easy Uploaded: 17 Aug 2026

Which scientist is credited with developing the special theory of relativity?

  • AIsaac Newton
  • BAlbert Einstein
  • CNiels Bohr
  • DMax Planck
7
Physics Easy Uploaded: 17 Aug 2026

The de Broglie hypothesis proposed that particles such as electrons exhibit:

  • ANo measurable properties
  • BOnly wave nature
  • CBoth wave and particle nature
  • DOnly particle nature
8
Physics Medium Uploaded: 17 Aug 2026

Quantum mechanics primarily deals with the behavior of:

  • AMacroscopic objects
  • BLarge celestial bodies
  • CSubatomic particles
  • DFluids in motion
9
Physics Medium Uploaded: 17 Aug 2026

The electron was discovered by:

  • ANiels Bohr
  • BJ.J. Thomson
  • CJames Chadwick
  • DErnest Rutherford
10
Physics Hard Uploaded: 17 Aug 2026

X-rays were discovered by:

  • AErnest Rutherford
  • BMarie Curie
  • CWilhelm Rontgen
  • DNiels Bohr