PPSC Everyday Science Past Paper 2022 Solved MCQs with Answers
Solved Everyday Science MCQs from the PPSC 2022 past paper, each with the correct answer and a clear explanation. Ideal practice for PPSC, FPSC, NTS, CSS and PMS. All questions are extracted from the actual 2022 paper and verified before publication.
Yellow fever vaccine is:
The yellow fever vaccine is live attenuated, a weakened form of the virus that gives lifelong protection from one dose.
Salk polio vaccine is:
The Salk vaccine is the killed, injected polio vaccine. The Sabin vaccine is the live oral one.
Varicella vaccine protects against:
The varicella vaccine protects against chickenpox.
Hib vaccine protects against:
Hib protects against Haemophilus influenzae type b, a cause of meningitis in young children.
Tdap vaccine is for:
Tdap is the booster formulation given to preteens, teenagers and adults. DTaP is for young children.
AstraZeneca and Johnson & Johnson COVID-19 vaccines are:
The AstraZeneca and Johnson & Johnson COVID-19 vaccines are viral vector vaccines. Pfizer and Moderna are mRNA vaccines.
Disease eradicated by vaccination:
Smallpox is the only human disease eradicated by vaccination, declared free in 1980.
Plague is primarily transmitted by:
Plague passes from rats to humans through the bite of infected fleas.
Anthrax mainly affects:
Anthrax chiefly attacks the skin and the lungs, the inhaled form being the most dangerous.
Disease caused by Salmonella:
Salmonella causes salmonellosis, including typhoid fever.
HIV primarily attacks:
HIV attacks the CD4 T-lymphocytes, which is why the immune system gradually collapses.
Ebola is transmitted by:
Ebola spreads through contact with body fluids, not through the air.
What is a galaxy?
A galaxy is a vast system of stars, dust and gas bound together by gravity.
What does the light coming from stars indicate about them?
Starlight reveals both the temperature of a star, from its colour, and its rotation, from the broadening of its spectral lines.
Why do constellations appear at different positions during the night?
Constellations appear to move across the sky through the night because the earth is rotating on its axis.
What phenomena are caused by sunspots?
Sunspot activity drives the polar auroras and geomagnetic storms, by hurling charged particles towards the earth.
What is the closest star to Earth other than the Sun?
Proxima Centauri is the nearest star to us after the sun.
How far is Proxima Centauri from Earth?
Proxima Centauri lies about 4.25 light years away.
Praesepe (Messier 44 / M44 / Beehive Cluster) is located in which constellation?
The Beehive Cluster, M44, lies in the constellation Cancer.
The change in colour of stars arises due to:
The colour of a star depends on its surface temperature. Blue stars are the hottest and red the coolest.
Polaris (the North Star) lies at the end of the handle of which constellation?
Polaris sits at the end of the handle of the Little Dipper, Ursa Minor.
What type of galaxy is the Milky Way?
The Milky Way is a barred spiral galaxy.
What is the diameter of the Milky Way?
The Milky Way is about 100,000 to 180,000 light years across.
What is the distance from the Sun to the Galactic Centre of the Milky Way?
The sun lies about 27,000 light years from the galactic centre.
How old is the Milky Way?
The Milky Way is about 13.6 billion years old, nearly as old as the universe itself.
How many stars are in the Milky Way (range)?
The Milky Way holds somewhere between 100 and 400 billion stars.
In which constellation is the Milky Way's central bulge located?
The central bulge of the Milky Way lies in the direction of Sagittarius.
The Milky Way is which of the following?
The Milky Way is our home galaxy, a barred spiral containing the solar system.
How is the Milky Way held together?
Gravity holds a galaxy together.
What is the closest LARGE galaxy to the Milky Way?
Andromeda, M31, is the nearest large galaxy to the Milky Way.
What is another common catalog name for the Andromeda Galaxy?
The Andromeda Galaxy is catalogued as M31.
What type of galaxy is the Andromeda Galaxy?
Andromeda is a spiral galaxy.
How far is the Andromeda Galaxy from Earth?
Andromeda lies about 2.48 million light years away.
What is the approximate diameter of the Andromeda Galaxy?
Andromeda is about 200,000 light years across, roughly twice the span of the Milky Way.
How many stars does the Andromeda Galaxy contain?
Andromeda is thought to contain about a trillion stars.
How many globular clusters are known to orbit in and around the Andromeda Galaxy?
At least 450 globular clusters are known around Andromeda.
How many dwarf galaxies are known to accompany the Andromeda Galaxy?
Andromeda is accompanied by 14 known dwarf galaxies.
What type of galaxy is Messier 87?
Messier 87 is a giant elliptical galaxy.
Messier 87 is also known as:
M87 is also called Virgo A, and catalogued as NGC 4486.
What is the diameter of Messier 87?
M87 is about 120,000 light years across.
How far is Messier 87 from Earth?
M87 lies about 54 million light years from earth.
In which constellation is Messier 87 located?
M87 is in the constellation Virgo, at the heart of the Virgo cluster.
M87 is famous as the home of:
M87 holds several trillion stars, about 15,000 globular clusters and the supermassive black hole that in 2019 became the first ever photographed.
The Antennae galaxies are classified as:
The Antennae are two interacting spiral galaxies, drawn into long tails by each other's gravity.
What is the tail-to-tail distance of the Antennae galaxies?
The Antennae stretch about 350,000 light years from tail to tail.
In which constellation are the Antennae galaxies located?
The Antennae galaxies lie in the constellation Corvus.
The Magellanic Clouds are classified as a:
The Magellanic Clouds are irregular galaxies, thought to be barred spirals disrupted by the Milky Way's gravity.
What is the diameter of the Large Magellanic Cloud (LMC)?
The Large Magellanic Cloud is about 14,000 light years across.
About the PPSC Everyday Science Past Paper 2022
Every MCQ above is taken from the Punjab Public Service Commission (PPSC) Everyday Science papers held in 2022, with the correct answer and a written explanation for each. Past-paper practice is the most dependable way to prepare for PPSC, FPSC, NTS, CSS and PMS, because these papers repeat their themes, and often the questions themselves, from one year to the next.
Questions were checked against reliable sources before publication. Where a circulating source sheet carried a factual or wording error, we corrected it rather than reproducing the mistake. For chapter-wise preparation, work through our Everyday Science MCQs hub, which also lists every other year’s paper. Further reading: Pakistan Movement and the PPSC official website.
How to Use This Paper
Attempt the full quiz before looking at any answer, then read the explanation for every question you got wrong, including those you guessed correctly. A past paper is only useful if you close the gaps it exposes. Pro members can download the complete paper as a PDF with all answers and explanations for offline revision.