PPSC General Knowledge MCQs

Alexander Graham Bell is commonly credited with the practical telephone.
He received a major U.S. telephone patent in 1876.

Johannes Gutenberg developed a movable-type printing system in Europe.
It greatly expanded the production of books.

James Watt greatly improved steam-engine efficiency.
His work supported the Industrial Revolution.

Alfred Nobel invented dynamite.
His fortune later funded the Nobel Prizes.

Jupiter is the largest planet by mass and diameter.
It is a gas giant with many moons.

Mars appears reddish because of iron oxide on its surface.
It is therefore called the Red Planet.

Saturn has an extensive system of icy rings.
Other giant planets also have rings, but Saturn's are most visible.

The Moon is Earth's only natural satellite.
It orbits Earth and influences ocean tides.

Power is the rate of doing work or using energy.
Its SI unit is the watt.

Electric current is measured in amperes.
The unit is named after André-Marie Ampère.

A barometer measures atmospheric pressure.
It is useful in weather observation and forecasting.

A thermometer measures temperature.
Different types use liquids, electronics, or infrared radiation.