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PPSC MCQs

Punjab Public Service Commission β€” Complete MCQ Bank

1,259 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
731

Which everyday safety practice helps protect skin from harmful ultraviolet radiation during sun exposure?

  • AWearing dark clothing only
  • BApplying sunscreen
  • CDrinking more water
  • DAvoiding all outdoor activity
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Correct Answer: Option B β€” Applying sunscreen
Explanation: Applying sunscreen helps protect skin from harmful ultraviolet radiation by absorbing or reflecting UV rays reducing the risk of sunburn and long term skin damage from sun exposure.
Submitted by: PaperMCQs
732

Which everyday phenomenon explains why a wet cloth dries faster on a windy day compared to a calm day?

  • AIncreased evaporation due to air movement
  • BDecreased evaporation due to air movement
  • CIncreased condensation
  • DSublimation effect
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Correct Answer: Option A β€” Increased evaporation due to air movement
Explanation: Wind increases evaporation by continuously removing the saturated air layer near the wet cloth surface allowing more water molecules to escape into the atmosphere causing faster drying.
Submitted by: PaperMCQs
733

Which everyday biological process allows the human body to maintain a stable internal environment despite external changes?

  • AMetabolism
  • BHomeostasis
  • COsmosis
  • DRespiration
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Correct Answer: Option B β€” Homeostasis
Explanation: Homeostasis is the process by which the human body maintains a stable internal environment such as temperature and pH despite changes in the external surroundings.
Submitted by: PaperMCQs
734

Which everyday material is commonly used to absorb excess moisture in packaged goods to prevent spoilage?

  • ASilica gel
  • BTable salt
  • CBaking soda
  • DCotton
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Correct Answer: Option A β€” Silica gel
Explanation: Silica gel packets are commonly placed in packaged goods to absorb excess moisture preventing mold growth and preserving the quality of products like electronics and dried foods.
Submitted by: PaperMCQs
735

Which everyday chemical process explains why sliced apples turn brown after being exposed to air?

  • AReduction reaction
  • BOxidation reaction
  • CNeutralization reaction
  • DSublimation
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Correct Answer: Option B β€” Oxidation reaction
Explanation: Sliced apples turn brown due to an oxidation reaction where enzymes react with oxygen in the air converting certain compounds into brown colored substances on the cut surface.
Submitted by: PaperMCQs
736

Which everyday device uses a small magnifying lens system to examine tiny objects not visible to the naked eye?

  • ATelescope
  • BMicroscope
  • CPeriscope
  • DBinoculars
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Correct Answer: Option B β€” Microscope
Explanation: A microscope uses a system of lenses to magnify tiny objects such as cells and microorganisms allowing detailed observation that is impossible with the naked eye alone.
Submitted by: PaperMCQs
737

Who is widely regarded as the father of Computer Science?

  • AJohn von Neumann
  • BAlan Turing
  • CCharles Babbage
  • DBill Gates
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Correct Answer: Option B β€” Alan Turing
Explanation: Alan Turing is widely known as the father of Computer Science because he developed the theoretical foundation of modern computing. In 1936, he introduced the concept of the Turing Machine, which demonstrated how computers can process information and solve problems through algorithms. His work also played a major role in the development of artificial intelligence and computer theory, making him one of the most influential figures in computing history.
Submitted by: Chandi
738

Which everyday optical device uses a combination of lenses to magnify distant objects?

  • AMicroscope
  • BTelescope
  • CPeriscope
  • DStethoscope
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Correct Answer: Option B β€” Telescope
Explanation: A telescope uses a combination of lenses or mirrors to collect and magnify light from distant objects making them appear closer and clearer to the observer.
Submitted by: PaperMCQs
739

Which household practice helps prevent the growth of mold in damp areas like bathrooms?

  • AIncreasing humidity
  • BProper ventilation
  • CClosing all windows
  • DReducing sunlight exposure
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Correct Answer: Option B β€” Proper ventilation
Explanation: Proper ventilation reduces moisture buildup in damp areas like bathrooms preventing the conditions mold spores need to grow and spread across surfaces.
Submitted by: PaperMCQs
740

Which property of sound determines how high or low it is perceived by the human ear?

  • AAmplitude
  • BFrequency
  • CWavelength
  • DSpeed
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Correct Answer: Option B β€” Frequency
Explanation: Frequency determines the pitch of sound with higher frequencies perceived as higher pitched tones and lower frequencies perceived as deeper sounds by the human ear.
Submitted by: PaperMCQs