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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
81

Which common substance has the chemical formula H2O2?

  • AWater
  • BAcetic acid
  • CHydrogen peroxide
  • DAmmonia
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Correct Answer: Option C — Hydrogen peroxide
Explanation: Hydrogen peroxide H2O2 is a common antiseptic used to clean wounds and is also used as a bleaching agent and differs from water by having an extra oxygen atom.
Submitted by: PaperMCQs
82

Which layer of the skin provides insulation and stores energy as fat?

  • AMelanocyte layer
  • BEpidermis
  • CDermis
  • DHypodermis
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Correct Answer: Option A — Melanocyte layer
Explanation: The hypodermis also called subcutaneous tissue is the deepest skin layer that stores fat for insulation energy reserve and cushioning against physical impact.
Submitted by: PaperMCQs
83

Which everyday process converts mechanical energy into electrical energy in a bicycle dynamo?

  • ARadiation
  • BConduction
  • CElectromagnetic induction
  • DChemical reaction
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Correct Answer: Option C — Electromagnetic induction
Explanation: A bicycle dynamo converts mechanical energy from wheel rotation into electrical energy through electromagnetic induction as a coil rotates within a magnetic field.
Submitted by: PaperMCQs
84

Which organ produces the hormone adrenaline that prepares the body for fight or flight response?

  • AThyroid gland
  • BPituitary gland
  • CPancreas
  • DAdrenal gland
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Correct Answer: Option D — Adrenal gland
Explanation: The adrenal glands located above the kidneys produce adrenaline which triggers the fight or flight response by increasing heart rate and blood flow to muscles.
Submitted by: PaperMCQs
85

Which everyday safety device detects dangerous levels of carbon monoxide in homes?

  • ASmoke detector
  • BCarbon monoxide detector
  • CThermostat
  • DHygrometer
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Correct Answer: Option B — Carbon monoxide detector
Explanation: Carbon monoxide detectors are specialized safety devices that detect dangerous levels of this odorless gas in homes alerting occupants before harmful exposure occurs.
Submitted by: PaperMCQs
86

Which colorless and odorless gas is particularly dangerous because it can cause poisoning without detection unless monitored?

  • ANatural gas
  • BCarbon monoxide
  • CHelium
  • DNitrogen
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Correct Answer: Option B — Carbon monoxide
Explanation: Carbon monoxide is a colorless and odorless gas produced by incomplete combustion making it particularly dangerous since it can cause poisoning without detection unless monitored by alarms.
Submitted by: PaperMCQs
87

Which common gas leak hazard in homes is often detected by its distinctive rotten egg smell added intentionally for safety?

  • ANatural gas leaks
  • BCarbon monoxide leaks
  • COxygen leaks
  • DNitrogen leaks
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Correct Answer: Option A — Natural gas leaks
Explanation: Natural gas is odorless in its pure form so a chemical called mercaptan is intentionally added to give it a rotten egg smell allowing people to detect leaks for safety.
Submitted by: PaperMCQs
88

Which storage practice helps slow down the ripening and spoilage process of most fruits and vegetables?

  • AStoring at room temperature
  • BRefrigeration
  • CStoring in direct sunlight
  • DStoring in plastic without ventilation
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Correct Answer: Option B — Refrigeration
Explanation: Refrigeration slows down the ripening and spoilage process of most fruits and vegetables by reducing the rate of enzymatic and microbial activity that causes decay.
Submitted by: PaperMCQs
89

Which common food safety practice prevents cross contamination between raw meat and other foods?

  • AUsing the same cutting board for everything
  • BUsing separate cutting boards for raw meat
  • CWashing hands only after cooking
  • DStoring meat at room temperature
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Correct Answer: Option B — Using separate cutting boards for raw meat
Explanation: Using separate cutting boards for raw meat and other foods prevents cross contamination by avoiding the transfer of harmful bacteria from raw meat to ready to eat items.
Submitted by: PaperMCQs
90

Which everyday hygiene practice is most effective in preventing the spread of common cold and flu viruses?

  • AWashing hands frequently
  • BEating spicy food
  • CDrinking cold water
  • DWearing sunglasses
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Correct Answer: Option A — Washing hands frequently
Explanation: Washing hands frequently with soap and water removes viruses and bacteria from the skin significantly reducing the risk of spreading common cold and flu infections to others.
Submitted by: PaperMCQs