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FPSC MCQs

Federal Public Service Commission — Complete MCQ Bank

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

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All Subjects Biology Chemistry Computer Science Current Affairs English Everyday Science General Knowledge Islamic Studies Mathematics Pakistan Studies Physics
71
Everyday Science Easy

Which everyday observation shows that hot air rises and cool air sinks creating circulation?

  • ABoiling water forming convection currents
  • BIce melting in sunlight
  • CMetal expanding when heated
  • DSound echoing in a hall
Permalink
Correct Answer: Option A — Boiling water forming convection currents
Explanation: Boiling water shows convection currents as hot less-dense water rises to the surface while cooler denser water sinks demonstrating natural thermal circulation.
Submitted by: PaperMCQs
72
Everyday Science Medium

Which process allows a submarine to sink or rise by adjusting water in ballast tanks?

  • AChanging buoyancy through water displacement
  • BEvaporation
  • COsmosis
  • DThermal expansion
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Correct Answer: Option A — Changing buoyancy through water displacement
Explanation: Submarines control their depth by filling or emptying ballast tanks with water to change their overall density relative to the surrounding water adjusting buoyancy.
Submitted by: PaperMCQs
73
Everyday Science Medium

Which common ailment is caused by the Helicobacter pylori bacterium?

  • ACommon cold
  • BStomach ulcers
  • CMalaria
  • DChickenpox
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Correct Answer: Option B — Stomach ulcers
Explanation: Helicobacter pylori is a bacterium that infects the stomach lining causing inflammation that can lead to peptic ulcers and is treatable with antibiotics.
Submitted by: PaperMCQs
74
Everyday Science Medium

Which phenomenon explains why a straw placed in a drink allows liquid to be sucked upward?

  • AGravity pulling liquid
  • BMagnetic force
  • CAtmospheric pressure pushing liquid up
  • DSurface tension alone
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Correct Answer: Option C — Atmospheric pressure pushing liquid up
Explanation: When you suck on a straw you reduce air pressure inside it and the greater atmospheric pressure outside pushes the liquid upward into your mouth.
Submitted by: PaperMCQs
75
Everyday Science Easy

Which vitamin is produced when ultraviolet light acts on cholesterol in the skin?

  • AVitamin A
  • BVitamin E
  • CVitamin K
  • DVitamin D
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Correct Answer: Option D — Vitamin D
Explanation: Vitamin D is synthesised in the skin when UV-B radiation converts a form of cholesterol into Vitamin D3 which is then processed by the liver and kidneys.
Submitted by: PaperMCQs
76
Everyday Science Easy

Which everyday process is used when a doctor listens to heartbeats through a stethoscope?

  • ARefraction of sound
  • BConduction of sound
  • CAmplification of light
  • DReflection of light
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Correct Answer: Option B — Conduction of sound
Explanation: A stethoscope conducts sound from the chest through the tube to the earpieces amplifying the otherwise faint sounds of heartbeats and breathing.
Submitted by: PaperMCQs
77
Everyday Science Medium

Which everyday item uses the principle of total internal reflection to transmit data as light signals?

  • APeriscope
  • BOptical fibre cable
  • CTelescope
  • DMicroscope
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Correct Answer: Option B — Optical fibre cable
Explanation: Optical fibre cables use total internal reflection to transmit data as pulses of light over long distances with minimal signal loss forming the backbone of modern internet.
Submitted by: PaperMCQs
78
Everyday Science Medium

Which gas is used to fill incandescent light bulb to prevent the filament from burning?

  • AOxygen
  • BCarbon dioxide
  • CArgon or nitrogen
  • DHelium
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Correct Answer: Option C — Argon or nitrogen
Explanation: Incandescent bulbs are filled with argon or nitrogen to prevent the tungsten filament from oxidising and burning out quickly extending the bulb's lifespan.
Submitted by: PaperMCQs
79
Everyday Science Medium

Which phenomenon causes a needle to deflect when placed near a current-carrying wire?

  • AMagnetism
  • BGravity
  • CStatic electricity
  • DSound waves
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Correct Answer: Option A — Magnetism
Explanation: A current-carrying wire produces a magnetic field around it which deflects a nearby compass needle demonstrating the link between electricity and magnetism.
Submitted by: PaperMCQs
80
Everyday Science Medium

Which everyday material is used as an X-ray absorber to protect the body during medical scans?

  • ACopper
  • BLead
  • CAluminium
  • DSteel
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Correct Answer: Option B — Lead
Explanation: Lead is used as a shield during X-ray procedures because it effectively absorbs harmful ionising radiation protecting body parts not being examined.
Submitted by: PaperMCQs
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