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NTS MCQs

National Testing Service — Complete MCQ Bank

262 Questions
Exam Preparation Guide

How to prepare for NTS

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

EnglishQuantitative SkillsAnalytical ReasoningSubject Knowledge
Practice under a timer and review weak areas after every test to improve both speed and accuracy.
NTS preparation illustration
231

Which everyday device uses the principle of capillary action to function?

  • AThermometer
  • BCandle wick
  • CBarometer
  • DMagnet
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Correct Answer: Option B — Candle wick
Explanation: A candle wick uses capillary action to draw melted wax upward toward the flame allowing continuous burning as the liquid wax is pulled through the narrow fibers of the wick.
Submitted by: PaperMCQs
232

Which gas law states that the volume of a gas is directly proportional to its temperature at constant pressure?

  • ABoyle's law
  • BCharles's law
  • CGay-Lussac's law
  • DAvogadro's law
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Correct Answer: Option B — Charles's law
Explanation: Charles's law states that at constant pressure the volume of a gas is directly proportional to its absolute temperature meaning gas expands when heated and contracts when cooled.
Submitted by: PaperMCQs
233

Which gas law states that pressure and volume of a gas are inversely proportional at constant temperature?

  • ABoyle's law
  • BCharles's law
  • CGay-Lussac's law
  • DAvogadro's law
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Correct Answer: Option A — Boyle's law
Explanation: Boyle's law states that at constant temperature the pressure of a gas is inversely proportional to its volume meaning increased pressure results in decreased volume and vice versa.
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234

Which principle explains the lift generated by an aircraft wing due to differences in air pressure?

  • APascal's law
  • BBernoulli's principle
  • CArchimedes' principle
  • DBoyle's law
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Correct Answer: Option B — Bernoulli's principle
Explanation: Bernoulli's principle explains that faster moving air over an aircraft wing creates lower pressure compared to slower air beneath generating the lift needed for flight.
Submitted by: PaperMCQs
235

Which scientific principle explains why objects float or sink in a fluid?

  • AArchimedes' principle
  • BPascal's law
  • CBernoulli's principle
  • DNewton's law
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Correct Answer: Option A — Archimedes' principle
Explanation: Archimedes' principle states that an object submerged in a fluid experiences an upward buoyant force equal to the weight of fluid displaced determining whether it floats or sinks.
Submitted by: PaperMCQs
236

Which law explains the equal and opposite reaction observed when a rocket launches?

  • ANewton's first law
  • BNewton's second law
  • CNewton's third law
  • DLaw of conservation of energy
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Correct Answer: Option C — Newton's third law
Explanation: Newton's third law states that for every action there is an equal and opposite reaction explaining how a rocket is propelled forward by expelling gases backward at high speed.
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237

Which law of motion explains why passengers lurch forward when a moving bus suddenly stops?

  • ANewton's first law
  • BNewton's second law
  • CNewton's third law
  • DLaw of gravitation
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Correct Answer: Option A — Newton's first law
Explanation: Newton's first law of inertia explains that passengers continue moving forward when a bus suddenly stops because objects in motion tend to remain in motion unless acted upon by an external force.
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238

Which type of energy is stored in the chemical bonds of food and fuels?

  • AKinetic energy
  • BPotential energy
  • CChemical energy
  • DThermal energy
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Correct Answer: Option C — Chemical energy
Explanation: Chemical energy is stored in the bonds between atoms in food and fuels and is released through chemical reactions such as digestion or combustion to perform useful work.
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239

Which element is the primary component of natural gas used for cooking and heating?

  • APropane
  • BMethane
  • CButane
  • DEthane
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Correct Answer: Option B — Methane
Explanation: Methane is the primary component of natural gas commonly used for cooking and heating due to its high combustion efficiency and widespread availability through pipeline distribution.
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240

Which vitamin deficiency commonly causes night blindness in humans?

  • AVitamin A
  • BVitamin B1
  • CVitamin C
  • DVitamin E
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Correct Answer: Option A — Vitamin A
Explanation: Vitamin A deficiency commonly causes night blindness because this vitamin is essential for producing rhodopsin a pigment in the retina necessary for vision in low light conditions.
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