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FPSC MCQs

Federal Public Service Commission — Complete MCQ Bank

1,458 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.
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771

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.
Submitted by: PaperMCQs
772

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.
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773

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.
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774

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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775

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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776

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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777

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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778

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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779

Which vitamin deficiency commonly causes the disease scurvy?

  • AVitamin A
  • BVitamin B12
  • CVitamin C
  • DVitamin D
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Correct Answer: Option C — Vitamin C
Explanation: Scurvy is caused by a deficiency of Vitamin C which is essential for collagen synthesis and its absence leads to symptoms such as bleeding gums and joint pain.
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780

Which gland in the human body is often referred to as the master gland because it controls other endocrine glands?

  • AThyroid gland
  • BPituitary gland
  • CAdrenal gland
  • DPancreas
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Correct Answer: Option B — Pituitary gland
Explanation: The pituitary gland is referred to as the master gland because it secretes hormones that regulate the activity of other endocrine glands throughout the human body.
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