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PPSC MCQs

Punjab Public Service Commission β€” Complete MCQ Bank

1,262 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
511

Which scientific instrument is used to measure very small distances such as the diameter of a wire or thickness of a sheet?

  • ARuler
  • BBarometer
  • CAmmeter
  • DVernier calliper
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Correct Answer: Option D β€” Vernier calliper
Explanation: A Vernier calliper is a precision measuring instrument used to measure small distances such as the diameter of a wire or the thickness of a sheet with high accuracy.
Submitted by: PaperMCQs
512

Which common safety device in electrical circuits breaks the circuit when current exceeds a safe limit to prevent fires?

  • ASwitch
  • BFuse
  • CResistor
  • DCapacitor
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Correct Answer: Option B β€” Fuse
Explanation: A fuse is a safety device containing a thin wire that melts and breaks the circuit if current exceeds a safe limit protecting appliances and wiring from fire risk.
Submitted by: PaperMCQs
513

Which photoreceptor cells in the eye are responsible for vision in dim light and cannot distinguish colours?

  • ACone cells
  • BGanglion cells
  • CBipolar cells
  • DRod cells
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Correct Answer: Option D β€” Rod cells
Explanation: Rod cells are the photoreceptors in the retina specialised for detecting light in dim conditions allowing vision in low light but they cannot distinguish between colours.
Submitted by: PaperMCQs
514

Which photoreceptor cells in the eye are responsible for colour vision and function best in bright light?

  • ACone cells
  • BRod cells
  • CGanglion cells
  • DBipolar cells
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Correct Answer: Option A β€” Cone cells
Explanation: Cone cells are the photoreceptors in the retina responsible for colour vision and sharp detail and they function best under bright lighting conditions unlike rod cells.
Submitted by: PaperMCQs
515

Which layer at the back of the eye contains photoreceptor cells called rods and cones that detect light?

  • AIris
  • BRetina
  • CCornea
  • DLens
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Correct Answer: Option B β€” Retina
Explanation: The retina is the light-sensitive layer at the back of the eye containing rod cells for detecting light intensity and cone cells for detecting colour in bright conditions.
Submitted by: PaperMCQs
516

Which part of the human eye is responsible for forming a sharp image by focusing light onto the retina?

  • ACornea only
  • BIris
  • CRetina
  • DLens
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Correct Answer: Option D β€” Lens
Explanation: The lens of the eye focuses light onto the retina by changing its shape in a process called accommodation allowing the eye to focus on objects at varying distances.
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517

Which term describes the process of a solid changing directly to a gas without passing through the liquid state?

  • ASublimation
  • BEvaporation
  • CCondensation
  • DMelting
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Correct Answer: Option A β€” Sublimation
Explanation: Sublimation is the process where a solid changes directly to a gas without passing through the liquid state as seen with dry ice carbon dioxide transforming to vapour.
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518

Which type of diet is most commonly recommended for preventing cardiovascular disease due to its emphasis on healthy fats?

  • AHigh fat diet
  • BCarnivore diet
  • CHigh sugar diet
  • DMediterranean diet
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Correct Answer: Option D β€” Mediterranean diet
Explanation: The Mediterranean diet emphasising fruits vegetables whole grains legumes and healthy fats from olive oil and fish is widely recommended for reducing cardiovascular disease risk.
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519

Which common property of water describes water molecules being attracted to each other through hydrogen bonds?

  • AAdhesion
  • BSurface tension
  • CViscosity
  • DCohesion
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Correct Answer: Option D β€” Cohesion
Explanation: Cohesion describes the attraction of water molecules to each other through hydrogen bonds and is one reason water forms droplets and has relatively high surface tension.
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520

Which common property of water is described as the tendency of water molecules to stick to other surfaces?

  • ACohesion
  • BSurface tension
  • CAdhesion
  • DViscosity
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Correct Answer: Option C β€” Adhesion
Explanation: Adhesion is the property that describes water molecules sticking to other surfaces such as glass or plant cell walls and is responsible for capillary action in plants.
Submitted by: PaperMCQs