Join WhatsApp ChannelDaily MCQs & Exam Updates

FPSC MCQs

Federal Public Service Commission — Complete MCQ Bank

269 Questions
Exam Preparation Guide

How to prepare for FPSC

FPSC recruitment tests assess subject knowledge, general ability and job-related competence for federal government positions across Pakistan.

General KnowledgeCurrent AffairsEnglishJob-related Subjects
Read the official syllabus first, then combine subject-specific revision with timed mixed-question practice.
FPSC preparation illustration
171

Which gas is most responsible for causing acid rain when it reacts with atmospheric moisture?

  • ACarbon dioxide
  • BSulfur dioxide
  • CNitrogen
  • DHelium
Permalink
Correct Answer: Option B — Sulfur dioxide
Explanation: Sulfur dioxide released from burning fossil fuels reacts with water vapor in the atmosphere forming sulfuric acid which falls as acid rain damaging soil water bodies and structures.
Submitted by: PaperMCQs
172

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
Permalink
Correct Answer: Option B — 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
173

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
Permalink
Correct Answer: Option A — 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
174

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

  • AMetabolism
  • BHomeostasis
  • COsmosis
  • DRespiration
Permalink
Correct Answer: Option B — 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
175

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

  • ASilica gel
  • BTable salt
  • CBaking soda
  • DCotton
Permalink
Correct Answer: Option A — 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
176

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

  • AReduction reaction
  • BOxidation reaction
  • CNeutralization reaction
  • DSublimation
Permalink
Correct Answer: Option B — 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
177

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

  • ATelescope
  • BMicroscope
  • CPeriscope
  • DBinoculars
Permalink
Correct Answer: Option B — 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
178

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

  • AMicroscope
  • BTelescope
  • CPeriscope
  • DStethoscope
Permalink
Correct Answer: Option B — 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
179

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

  • AIncreasing humidity
  • BProper ventilation
  • CClosing all windows
  • DReducing sunlight exposure
Permalink
Correct Answer: Option B — 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
180

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

  • AAmplitude
  • BFrequency
  • CWavelength
  • DSpeed
Permalink
Correct Answer: Option B — 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