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PPSC MCQs

Punjab Public Service Commission β€” Complete MCQ Bank

1,259 Questions
Exam Preparation Guide

How to prepare for PPSC

PPSC examinations recruit candidates for Punjab government departments and commonly test general knowledge, current affairs, English and post-related subjects.

Punjab AffairsGeneral KnowledgeCurrent AffairsEnglish
Give special attention to Punjab geography, history and administration alongside the advertised post’s specialist syllabus.
PPSC preparation illustration
811

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 β€” 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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812

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 β€” 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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813

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 β€” 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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814

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 β€” 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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815

Which vitamin deficiency commonly causes the disease scurvy?

  • AVitamin A
  • BVitamin B12
  • CVitamin C
  • DVitamin D
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Correct Answer: Option C β€” 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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816

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 β€” 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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817

Which part of the human brain regulates vital involuntary functions such as breathing and heartbeat?

  • ACerebrum
  • BCerebellum
  • CMedulla oblongata
  • DHypothalamus
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Correct Answer: Option C β€” Medulla oblongata
Explanation: The medulla oblongata located in the brainstem regulates vital involuntary functions including breathing heart rate and blood pressure essential for sustaining basic life processes.
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818

Which part of the human brain is primarily responsible for controlling balance and coordination?

  • ACerebrum
  • BCerebellum
  • CMedulla oblongata
  • DHypothalamus
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Correct Answer: Option B β€” Cerebellum
Explanation: The cerebellum located at the back of the brain is primarily responsible for controlling balance posture and fine motor coordination during voluntary muscle movements.
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819

Which blood type is known as the universal recipient for blood transfusions?

  • AO negative
  • BAB positive
  • CA negative
  • DB positive
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Correct Answer: Option B β€” AB positive
Explanation: AB positive blood is known as the universal recipient type because it contains both A and B antigens along with the Rh factor allowing it to accept blood from all other types.
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820

Which blood type is known as the universal donor for blood transfusions?

  • AA positive
  • BAB positive
  • CO negative
  • DB negative
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Correct Answer: Option C β€” O negative
Explanation: O negative blood is known as the universal donor type because it lacks A B and Rh antigens making it compatible with recipients of nearly any blood type in emergency transfusions.
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