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NTS MCQs

National Testing Service — Complete MCQ Bank

1,084 Questions
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How to prepare for NTS

NTS tests evaluate aptitude, analytical reasoning, quantitative ability, English and subject knowledge for admissions, scholarships and recruitment.

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411
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
Permalink
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
412
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
413
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
Permalink
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.
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414
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
415
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
Permalink
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
416
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
Permalink
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
417
Everyday Science Medium

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

  • AMagnetism
  • BGravity
  • CStatic electricity
  • DSound waves
Permalink
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
418
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
419
Everyday Science Easy

Which sense organ contains the olfactory receptors responsible for detecting smells?

  • AEars
  • BEyes
  • CNose
  • DTongue
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Correct Answer: Option C — Nose
Explanation: The nose contains olfactory receptors located in the nasal cavity that detect chemical molecules in the air and transmit smell information to the brain.
Submitted by: PaperMCQs
420
Everyday Science Easy

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
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