All Free Everyday Science MCQs with Answers

1911. Battery was invented by__________?

• A. Nicolas Léonard Sadi Carnot
• B. Alessandro Volta
• C. Michael Faraday
• D. Friedrich Bessel

Explanation: Alessandro Volta made the first practical chemical battery, the voltaic pile, in 1800. Faraday later established important laws of electromagnetic induction, but he did not invent the battery.

1912. who invented bulb?

• A. Philips
• B. Robert
• C. Edison
• D. Willium

Explanation: Thomas Edison is commonly credited in general-knowledge questions with inventing the practical incandescent electric bulb. Earlier inventors produced experimental bulbs, but Edison developed a durable, commercially useful version.

1913. "Elephant" large unit of paper measurement equal to 28 by__________

• A. 23 inches
• B. 25 inches
• C. 28 inches
• D. 31 inches

Explanation: Elephant paper is a large traditional paper size measuring 28 by 23 inches. The name refers to the sheet size, not to a physical property of paper.

1914. Fuzzy logic is a part of_________________?

• A. Aristotle's philosophy
• B. Computer science
• C. Epicurianism
• D. Sophism

Explanation: Fuzzy logic is a computing method that handles degrees of truth rather than only true-or-false values, making it useful in control systems and artificial intelligence. The philosophical options are unrelated schools of thought.

1915. An extremely small piece of silicon on which integrated circuits are implicated is called __________________?

• A. Card Reader
• B. Hollerith Code
• C. Feed
• D. Chip

Explanation: A chip is a small piece of semiconductor material, usually silicon, containing an integrated circuit. Card readers and Hollerith codes are data-processing devices or methods, not the silicon component itself.

1916. Intrinsic Semi-conductor is also known as__________?

• A. Impure-Conductor
• B. Pure-Conductor
• C. Simple Conductor
• D. None of these

Explanation: An intrinsic semiconductor is made from a chemically pure semiconductor material, without intentional impurity doping. Hence it is commonly called a pure semiconductor, not a simple conductor.

1917. On passing through food stuff, X-ray can kill the___________?

• A. Fungus
• B. Virus
• C. Bacteria
• D. insects

Explanation: Food irradiation with X-rays is used mainly to destroy bacteria and other microorganisms, helping extend shelf life and improve safety. The standard answer for this general food-preservation question is bacteria.

1918. What is/are the basic purpose(s) of dams?

• A. Storage of water in a large reservoir
• B. Generation of electricity
• C. Control of floods
• D. All of the above

Explanation: Dams can store water, generate hydroelectric power and regulate floods, although their actual functions depend on their design. Therefore all three listed purposes are valid.

1919. What is the element required for solar energy conversion ______?

• A. Ultra pure carbon
• B. Silicon
• C. Beryllium
• D. Tantalum

Explanation: Silicon is a semiconductor whose electrical properties allow solar cells to convert light energy into electrical energy. Ultra-pure silicon is commonly used because impurities strongly affect its conductivity.

1920. The oldest barrage on the river Indus at Sukkur was built in_____?

• A. 1932
• B. 1940
• C. 1930
• D. 1928

Explanation: The Sukkur Barrage on the Indus was completed in 1932 and began regulating irrigation water from the river. It is also known as Lloyd Barrage.