All Free Everyday Science MCQs with Answers

1871. A summary value calculated from population is called?

• A. Parameter
• B. Sample
• C. Statistic
• D. Population

Explanation: A numerical summary calculated from an entire population is called a parameter. The corresponding value calculated from a sample is called a statistic.

1872. Lignite, bituminous & anthracite are different rank of _________ ?

• A. Iron
• B. Coal
• C. Wood
• D. None of these

Explanation: Lignite, bituminous coal and anthracite represent increasing ranks of coal, mainly reflecting increasing carbon content and degree of coalification. Anthracite is the hardest and most carbon-rich of these three.

1873. Which of these is NOT a form of energy?

• A. Heat
• B. Light
• C. Temperature
• D. Electricity

Explanation: Temperature measures how hot or cold something is, whereas heat, light and electricity are forms of energy or energy transfer. Temperature and heat are related but are not the same physical quantity.

1874. Which of these is NOT an example of a renewable energy source?

• A. Wind energy
• B. solar
• C. Coal
• D. Hydroelectric power

Explanation: Coal is a fossil fuel formed over millions of years, so its supply is finite and non-renewable. Wind, sunlight and flowing water are naturally replenished.

1875. For the generation of biogas, the materials commonly used are__________?

• A. Animal wastes
• B. Forest residues
• C. Aquatic plants
• D. None of these

Explanation: Animal waste is commonly fed into an oxygen-free digester, where microorganisms break it down to produce methane-rich biogas. Other organic residues can also be used, but animal waste is the standard answer here.

1876. An ordinary mobile phone communicate by using___________?

• A. Sound waves
• B. Infrared waves
• C. UV waves
• D. Radio waves

Explanation: Mobile phones communicate with cellular networks using radio-frequency electromagnetic waves. Sound is converted into electrical signals, whereas infrared and ultraviolet waves are not used for ordinary cellular communication.

1877. Optic fibers are mainly used for which of the following:

• A. Communication
• B. Weaving
• C. Food indudtry
• D. None of these

Explanation: Optical fibres transmit information as pulses of light with low signal loss, so they are widely used in telephone, internet, and cable communication. Their main purpose is not weaving or food processing.

1878. The first cloned animal was____________?

• A. Goat
• B. Cow
• C. Rat
• D. Sheep

Explanation: Dolly, a sheep, was the first mammal cloned from an adult somatic cell, making sheep the standard answer in general science MCQs. Earlier experiments cloned embryos and amphibians, so the wording is simplified.

1879. Electric motor was invented by __________ ?

• A. Michael Faraday
• B. Oliver Evans
• C. Thomas Edison
• D. Horace Day

Explanation: Michael Faraday demonstrated an early electric motor in 1821 by converting electrical energy into continuous mechanical motion. His work was based on the interaction between electric current and a magnetic field.

1880. Medium which sends signal from source to destination is known as ________ ?

• A. Transmitter
• B. Transmission channel
• C. Receiver
• D. Hardware

Explanation: A transmission channel is the medium or path that carries a signal from its source to its destination. A transmitter sends the signal, while a receiver accepts it.