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
91

Which type of microorganism is responsible for causing common food spoilage through mold growth?

  • ABacteria
  • BFungi
  • CVirus
  • DProtozoa
Permalink
Correct Answer: Option B — Fungi
Explanation: Fungi including various molds are responsible for common food spoilage by breaking down organic material and producing visible fuzzy growth on items like bread and fruit.
Submitted by: PaperMCQs
92

Which microorganism is primarily responsible for fermenting sugars into alcohol in brewing and winemaking?

  • ABacteria
  • BYeast
  • CAlgae
  • DProtozoa
Permalink
Correct Answer: Option B — Yeast
Explanation: Yeast ferments sugars into alcohol and carbon dioxide through anaerobic respiration making it essential for brewing beer producing wine and baking bread.
Submitted by: PaperMCQs
93

Which microorganism is primarily responsible for fermenting milk into yogurt?

  • AYeast
  • BLactic acid bacteria
  • CMold
  • DVirus
Permalink
Correct Answer: Option B — Lactic acid bacteria
Explanation: Lactic acid bacteria ferment lactose in milk into lactic acid which thickens the milk and gives yogurt its characteristic tangy flavor and creamy texture.
Submitted by: PaperMCQs
94

Which gas produced during fermentation causes dough to rise when making bread?

  • AOxygen
  • BCarbon dioxide
  • CNitrogen
  • DHydrogen
Permalink
Correct Answer: Option B — Carbon dioxide
Explanation: Carbon dioxide gas produced by yeast during fermentation causes bread dough to rise creating the light airy texture characteristic of well baked bread products.
Submitted by: PaperMCQs
95

Which everyday material is commonly used as a natural disinfectant due to its antimicrobial properties?

  • ASugar
  • BHoney
  • CSalt water alone
  • DCooking oil
Permalink
Correct Answer: Option B — Honey
Explanation: Honey has natural antimicrobial properties due to its low moisture content and acidic pH making it effective as a natural disinfectant and wound healing aid in traditional medicine.
Submitted by: PaperMCQs
96

Which everyday process explains why water boils at a lower temperature at high altitudes such as on mountains?

  • ALower atmospheric pressure
  • BHigher atmospheric pressure
  • CIncreased oxygen levels
  • DReduced gravity
Permalink
Correct Answer: Option A — Lower atmospheric pressure
Explanation: At high altitudes atmospheric pressure is lower which reduces the boiling point of water meaning it boils at a temperature below 100 degrees Celsius found at sea level.
Submitted by: PaperMCQs
97

Which everyday process explains why food cooks faster in a pressure cooker compared to an open pot?

  • ALower boiling point at high pressure
  • BHigher boiling point at high pressure
  • CReduced heat transfer
  • DIncreased oxygen levels
Permalink
Correct Answer: Option B — Higher boiling point at high pressure
Explanation: A pressure cooker raises internal pressure which increases the boiling point of water allowing food to cook faster at higher temperatures than would be possible in an open pot.
Submitted by: PaperMCQs
98

Which optical phenomenon creates the illusion of water on a hot road surface during sunny days?

  • ARainbow
  • BMirage
  • CAurora
  • DHalo
Permalink
Correct Answer: Option B — Mirage
Explanation: A mirage is an optical phenomenon caused by the bending of light through layers of air with varying temperatures creating the illusion of water on hot road surfaces during sunny days.
Submitted by: PaperMCQs
99

Which natural phenomenon produces colorful displays of light in polar regions due to solar particles interacting with the atmosphere?

  • ARainbow
  • BAurora
  • CHalo
  • DMirage
Permalink
Correct Answer: Option B — Aurora
Explanation: Auroras occur when charged particles from the sun interact with gases in Earth's upper atmosphere near the poles producing colorful displays of light known as the northern or southern lights.
Submitted by: PaperMCQs
100

Which natural phenomenon explains why a compass needle always points toward magnetic north?

  • AEarth's magnetic field
  • BEarth's gravitational field
  • CEarth's rotation
  • DSolar wind
Permalink
Correct Answer: Option A — Earth's magnetic field
Explanation: Earth's magnetic field generated by molten iron movement in its core causes a compass needle to align itself and point toward magnetic north providing a reliable navigation tool.
Submitted by: PaperMCQs