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PPSC MCQs

Punjab Public Service Commission β€” Complete MCQ Bank

273 Questions
Exam Preparation Guide

How to prepare for PPSC

PPSC examinations recruit candidates for Punjab government departments and commonly test general knowledge, current affairs, English and post-related subjects.

Punjab AffairsGeneral KnowledgeCurrent AffairsEnglish
Give special attention to Punjab geography, history and administration alongside the advertised post’s specialist syllabus.
PPSC preparation illustration
1

Which famous experiment proved that the Earth orbits the Sun rather than the Sun orbiting the Earth?

  • AGalileo's telescope observations
  • BNewton's apple experiment
  • CFoucault pendulum demonstration
  • DCopernicus's naked eye observations
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Correct Answer: Option A β€” Galileo's telescope observations
Explanation: Galileo's telescope observations in 1610 of Jupiter's moons and Venus's phases provided key evidence supporting the heliocentric model that Earth orbits the Sun.
Submitted by: PaperMCQs
2

Which natural phenomenon occurs when the Earth's crust suddenly releases energy causing ground shaking?

  • AEarthquake
  • BVolcanic eruption
  • CTsunami
  • DCyclone
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Correct Answer: Option A β€” Earthquake
Explanation: An earthquake occurs when energy stored in the Earth's crust is suddenly released along fault lines causing seismic waves that make the ground shake and can cause widespread damage.
Submitted by: PaperMCQs
3

Which phenomenon explains why the handles of pots and pans are made from plastic or wood rather than metal?

  • AMetal is too heavy
  • BPlastic handles are magnetic
  • CPlastic and wood are poor heat conductors preventing burns
  • DWood handles look better
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Correct Answer: Option C β€” Plastic and wood are poor heat conductors preventing burns
Explanation: Plastic and wood are poor conductors of heat meaning little heat transfers from the hot pot or pan to the handle preventing burns when cooking at high temperatures.
Submitted by: PaperMCQs
4

Which scientific instrument is used to measure very small distances such as the diameter of a wire or thickness of a sheet?

  • ARuler
  • BBarometer
  • CAmmeter
  • DVernier calliper
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Correct Answer: Option D β€” Vernier calliper
Explanation: A Vernier calliper is a precision measuring instrument used to measure small distances such as the diameter of a wire or the thickness of a sheet with high accuracy.
Submitted by: PaperMCQs
5

Which common safety device in electrical circuits breaks the circuit when current exceeds a safe limit to prevent fires?

  • ASwitch
  • BFuse
  • CResistor
  • DCapacitor
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Correct Answer: Option B β€” Fuse
Explanation: A fuse is a safety device containing a thin wire that melts and breaks the circuit if current exceeds a safe limit protecting appliances and wiring from fire risk.
Submitted by: PaperMCQs
6

Which photoreceptor cells in the eye are responsible for vision in dim light and cannot distinguish colours?

  • ACone cells
  • BGanglion cells
  • CBipolar cells
  • DRod cells
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Correct Answer: Option D β€” Rod cells
Explanation: Rod cells are the photoreceptors in the retina specialised for detecting light in dim conditions allowing vision in low light but they cannot distinguish between colours.
Submitted by: PaperMCQs
7

Which photoreceptor cells in the eye are responsible for colour vision and function best in bright light?

  • ACone cells
  • BRod cells
  • CGanglion cells
  • DBipolar cells
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Correct Answer: Option A β€” Cone cells
Explanation: Cone cells are the photoreceptors in the retina responsible for colour vision and sharp detail and they function best under bright lighting conditions unlike rod cells.
Submitted by: PaperMCQs
8

Which layer at the back of the eye contains photoreceptor cells called rods and cones that detect light?

  • AIris
  • BRetina
  • CCornea
  • DLens
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Correct Answer: Option B β€” Retina
Explanation: The retina is the light-sensitive layer at the back of the eye containing rod cells for detecting light intensity and cone cells for detecting colour in bright conditions.
Submitted by: PaperMCQs
9

Which part of the human eye is responsible for forming a sharp image by focusing light onto the retina?

  • ACornea only
  • BIris
  • CRetina
  • DLens
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Correct Answer: Option D β€” Lens
Explanation: The lens of the eye focuses light onto the retina by changing its shape in a process called accommodation allowing the eye to focus on objects at varying distances.
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10

Which term describes the process of a solid changing directly to a gas without passing through the liquid state?

  • ASublimation
  • BEvaporation
  • CCondensation
  • DMelting
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Correct Answer: Option A β€” Sublimation
Explanation: Sublimation is the process where a solid changes directly to a gas without passing through the liquid state as seen with dry ice carbon dioxide transforming to vapour.
Submitted by: PaperMCQs