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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
251

Which household appliance operates on the principle of electromagnetic induction to heat food?

  • AMicrowave oven
  • BInduction stove
  • CElectric kettle
  • DToaster
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Correct Answer: Option B — Induction stove
Explanation: Induction stoves use electromagnetic induction to generate heat directly within ferromagnetic cookware making them more energy efficient than traditional electric or gas stoves.
Submitted by: PaperMCQs
252

Which gas is commonly used to fill balloons so that they float in air?

  • AOxygen
  • BCarbon dioxide
  • CHelium
  • DNitrogen
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Correct Answer: Option C — Helium
Explanation: Helium is used to fill balloons because it is significantly lighter than air allowing balloons to float and rise due to its low density compared to atmospheric gases.
Submitted by: PaperMCQs
253

Which property of light explains why a straw appears bent when placed in a glass of water?

  • AReflection
  • BRefraction
  • CDiffraction
  • DDispersion
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Correct Answer: Option B — Refraction
Explanation: Refraction is the bending of light as it passes from one medium to another with different optical densities causing the straw to appear bent at the water's surface.
Submitted by: PaperMCQs
254

Which type of mirror is commonly used in vehicle side mirrors to provide a wider field of view?

  • AConcave mirror
  • BConvex mirror
  • CPlane mirror
  • DParabolic mirror
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Correct Answer: Option B — Convex mirror
Explanation: Convex mirrors are used in vehicle side mirrors because they diverge light rays producing a smaller but wider field of view helping drivers see more of their surroundings.
Submitted by: PaperMCQs
255

Which simple machine is used in a pair of scissors?

  • ALever
  • BPulley
  • CWheel and axle
  • DInclined plane
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Correct Answer: Option A — Lever
Explanation: Scissors function as a compound lever where two blades pivot around a fixed point allowing mechanical advantage to cut through materials with reduced applied force.
Submitted by: PaperMCQs
256

What is the normal body temperature of a healthy human in degrees Fahrenheit?

  • A95.6
  • B98.6
  • C101.6
  • D93.6
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Correct Answer: Option B — 98.6
Explanation: The average normal human body temperature is approximately 98.6 degrees Fahrenheit equivalent to 37 degrees Celsius though slight variations are normal among individuals throughout the day.
Submitted by: PaperMCQs
257

Which gas do plants primarily absorb during photosynthesis?

  • AOxygen
  • BCarbon dioxide
  • CNitrogen
  • DHydrogen
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Correct Answer: Option B — Carbon dioxide
Explanation: Plants absorb carbon dioxide from the atmosphere during photosynthesis using sunlight and water to convert it into glucose and oxygen which is released as a byproduct.
Submitted by: PaperMCQs
258

Which organ in the human body is primarily responsible for filtering blood and removing waste?

  • ALiver
  • BKidney
  • CSpleen
  • DPancreas
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Correct Answer: Option B — Kidney
Explanation: The kidneys filter blood to remove metabolic waste products and excess fluids excreting them as urine while also regulating electrolyte balance and blood pressure in the body.
Submitted by: PaperMCQs
259

Which vitamin is primarily synthesized in human skin upon sunlight exposure?

  • AVitamin A
  • BVitamin C
  • CVitamin D
  • DVitamin K
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Correct Answer: Option C — Vitamin D
Explanation: Vitamin D is synthesized in the skin when exposed to ultraviolet B rays from sunlight and is essential for calcium absorption and maintaining healthy bones and immune function.
Submitted by: PaperMCQs
260

Which blood component is primarily responsible for clotting?

  • ARed blood cells
  • BWhite blood cells
  • CPlatelets
  • DPlasma
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Correct Answer: Option C — Platelets
Explanation: Platelets are small cell fragments in the blood that clump together at injury sites to form clots preventing excessive bleeding and initiating the wound healing process.
Submitted by: PaperMCQs