A horse runs around a ground twice and covers a distance of 8 km, one side of square ground is:
- (a) 8 km
- (b) 4 km
- (c) 1 km
- (d) 2 km
- (c) 1 km
4 × side = 4 km
Side = 4 km / 4 = 1 km.
Who among the followings invented bifocal spectacles and lightning rod?
- (a) Galileo
- (b) Benjamin Franklin
- (c) Thomas Edison
- (d) James Medison
- (b) Benjamin Franklin
Benjamin Franklin has two notable inventions to his credit: bifocal lenses and lightning rods.
Lightning Rod (circa 1750): Benjamin Franklin invented the lightning rod to protect structures from fires, inspired by his experimentation with electricity and his famous kite experiment.
Bifocals (circa 1784): Benjamin Franklin was tired of switching between two pairs of glasses to correct both nearsightedness and farsightedness. So, he cut two pairs of lenses and combined them into one.
Which gas field among the following is the second largest gas field in Pakistan which is being operated by OGDCL?
- (a) Bobi gasfield
- (b) Chachar gasfield
- (c) Qadir Pur gasfield
- (d) Uch gasfield
- (c) Qadir Pur gasfield
Qadirpur Gas Field can be cited as the second largest gas field in Pakistan after Sui, with the Oil & Gas Development Company Limited (OGDCL) owning most of the working interest. Situated in the Ghotki District in Sindh, this gas field started production in 1995 after it was discovered in 1990, with recoverable reserves of 4 trillion cubic feet (Tcf). The Qadirpur gas field contributes significantly to the national grid, serving SNGPL and a number of power plants.
Mars, the neighbour of Earth, has natural satellites:
- (a) 2
- (b) 3
- (c) 4
- (d) 5
- (a) 2
Our next planetary friend, Mars, has two small, oddly shaped satellites. Their names are Phobos and Deimos. These were discovered back in 1877 by Asaph Hall. Phobos is the bigger moon, closer to Mars. Deimos, the smaller moon, is farther away from Mars.
Phobos (Fear): Phobos orbits Mars very closely. It’s slowly spiraling towards Mars. In about 50 million years, Phobos will crash into Mars or break apart into a ring around Mars.
Deimos (Terror): The smaller moon, farther away from Mars, slowly moving away from Mars.
Max Plank won Noble Prize in Physics in 1918 for the discovery of _____.
- (a) Time Constant
- (b) Energy Quantum
- (c) Heat Constant
- (d) Wave Constant
- (b) Energy Quantum
Max Planck was awarded the 1918 Nobel Prize in Physics for his discovery of energy quanta. Planck’s 1900 work on blackbody radiation was instrumental in proving that energy is not emitted in a constant flow but in discrete quanta.
Which among the following instruments is used to measure the amount of liquid precipitation (rain) over a set period of time?
- (a) Hygrometer
- (b) Rain Gauge
- (c) Pedometer
- (d) Barometer
- (b) Rain Gauge
A rain gauge, also known as a udometer or pluviometer, is a weather device designed to measure the rain that falls on a particular surface over a particular time period. A rain gauge consists of a cylinder with a funnel on top that collects the rain and guides it into a marked tube.
– (a) Hygrometer is used to measure humidity in the air.
– (c) Pedometer is used to count the number of steps.
– (d) Barometer is used to measure the atmospheric pressure.
Parsec is a unit used to measure _______.
- (a) Time
- (b) Speed
- (c) Distance
- (d) Force
- (c) Distance
A parsec, abbreviated pc, is a unit used by astronomers to measure the vast distances in our universe, such as between stars or galaxies. Parsecs measure length, not time, speed, or force. Parsec is the distance at which the distance between the Earth and the Sun (one astronomical unit) subtends an angle of one arc second. In other words, it is 3.26 light-years or 206,265 astronomical units, which is approximately 31 trillion kilometers. The word parsec is derived from the phrase “parallax of one second.”
– (a) Time: Parsecs measure angles, not time. Parsecs have no connection with time, contrary to what many fans of Star Wars believe.
– (b) Speed: The unit of speed is measured in meters per second or kilometers per hour.
– (d) Force: The unit of force is measured in newtons (N).
Solar eclipse occurs when:
- (a) Earth comes between sun and moon
- (b) Moon comes between sun and earth
- (c) Sun comes between earth and moon
- (d) Sun rays don’t reach the earth
- (b) Moon comes between sun and earth
Solar eclipse is the term given when the Moon passes directly between the Sun and the Earth. The Sun and Moon are almost the same size from our perspective, and so the Moon is able to cover the Sun completely or partially, causing a shadow on the Earth’s surface. This is called syzygy and only occurs during the new moon phase.
Stoma, found in the epidermis of leaves closes when guard cells _______.
- (a) Gain Water
- (b) Lose Water
- (c) Exchange Gas
- (d) None of these
- (b) Lose Water
Iron and steel structures are damaged by:
- (a) Carbon monoxide
- (b) Sulphur dioxide
- (c) Carbon dioxide
- (d) Methane
- (b) Sulphur dioxide
Iron and steel structures are mostly victims of corrosion, which is mainly caused by acidic gases present in the air. Sulfur dioxide (SO₂) reacts with moisture and, along with oxygen, forms sulfuric acid. It is this acid that catalyzes rusting, thereby accelerating the rate of corrosion. Iron and steel structures are quite stable in dry conditions, but even a trace of sulfur dioxide in moist air is enough to create a hostile environment that causes corrosion.