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PPSC MCQs

Punjab Public Service Commission β€” Complete MCQ Bank

273 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
111

Which planet in the solar system is known as the Red Planet due to its iron oxide rich surface?

  • AVenus
  • BMars
  • CJupiter
  • DMercury
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Correct Answer: Option B β€” Mars
Explanation: Mars is known as the Red Planet because its surface is rich in iron oxide or rust giving it a distinctive reddish appearance visible even from Earth.
Submitted by: PaperMCQs
112

Which astronomical event marks the day with nearly equal hours of day and night worldwide?

  • ASolstice
  • BEquinox
  • CPerigee
  • DApogee
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Correct Answer: Option B β€” Equinox
Explanation: An equinox marks the day with nearly equal hours of daylight and darkness worldwide occurring twice a year as the sun crosses directly over the equator.
Submitted by: PaperMCQs
113

Which astronomical event marks the day with the longest period of daylight in the Northern Hemisphere?

  • AWinter solstice
  • BSummer solstice
  • CSpring equinox
  • DAutumn equinox
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Correct Answer: Option B β€” Summer solstice
Explanation: The summer solstice marks the day with the longest period of daylight in the Northern Hemisphere occurring around June 21 when the sun reaches its highest point in the sky.
Submitted by: PaperMCQs
114

Which atmospheric phenomenon causes the sky to appear reddish orange during sunrise and sunset?

  • AIncreased blue light scattering
  • BLonger path length scattering out blue light
  • CAbsorption of all colors except red
  • DReflection from clouds only
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Correct Answer: Option B β€” Longer path length scattering out blue light
Explanation: During sunrise and sunset sunlight travels through more atmosphere scattering out most blue light and allowing longer wavelength red and orange light to dominate the visible sky color.
Submitted by: PaperMCQs
115

Which atmospheric phenomenon causes the sky to appear blue during the day?

  • AReflection of ocean water
  • BScattering of sunlight by atmospheric particles
  • CAbsorption of red light by clouds
  • DRefraction through ice crystals
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Correct Answer: Option B β€” Scattering of sunlight by atmospheric particles
Explanation: The sky appears blue because shorter blue wavelengths of sunlight are scattered more strongly by atmospheric gas molecules compared to longer wavelengths like red through Rayleigh scattering.
Submitted by: PaperMCQs
116

Which type of precipitation forms as layered ice balls created by strong updrafts within thunderstorms?

  • ASnow
  • BSleet
  • CHail
  • DFrost
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Correct Answer: Option C β€” Hail
Explanation: Hail forms as layered ice balls created by strong updrafts within thunderstorms that carry water droplets repeatedly through freezing layers of the atmosphere before falling to the ground.
Submitted by: PaperMCQs
117

Which type of precipitation forms when raindrops freeze before reaching the ground in cold conditions?

  • ASnow
  • BSleet
  • CHail
  • DDrizzle
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Correct Answer: Option B β€” Sleet
Explanation: Sleet forms when raindrops freeze into ice pellets before reaching the ground typically occurring when a layer of freezing air exists near the surface during winter storms.
Submitted by: PaperMCQs
118

Which natural process explains the formation of clouds in the atmosphere?

  • ASublimation of ice
  • BCondensation of water vapor
  • CEvaporation of seawater only
  • DPrecipitation
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Correct Answer: Option B β€” Condensation of water vapor
Explanation: Clouds form when water vapor in the atmosphere cools and condenses around tiny particles forming visible droplets or ice crystals that collectively appear as clouds.
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119

Which everyday phenomenon explains why a metal spoon feels colder than a wooden spoon at the same room temperature?

  • AMetal has higher specific heat
  • BMetal conducts heat away from skin faster
  • CWood absorbs more light
  • DMetal reflects more heat
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Correct Answer: Option B β€” Metal conducts heat away from skin faster
Explanation: Metal conducts heat away from the skin much faster than wood due to its higher thermal conductivity making it feel colder even though both objects are at the same room temperature.
Submitted by: PaperMCQs
120

Which modern lighting technology is significantly more energy efficient than traditional incandescent bulbs?

  • AHalogen bulbs
  • BLED bulbs
  • CFluorescent tubes only
  • DCandle light
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Correct Answer: Option B β€” LED bulbs
Explanation: LED bulbs are significantly more energy efficient than traditional incandescent bulbs because they convert a much higher percentage of electrical energy into light rather than heat.
Submitted by: PaperMCQs