Free Technology and Energy MCQs with Answers

21. 'Cyborg' term mostly used in Science-fiction movies describes:

• A. A human being whose physiological functions are aided by artificial means
• B. A Bionic Human
• C. An individual with artificial parts
• D. All of Above

Explanation: A cyborg is a biological organism, usually a human, whose functions are supported or enhanced by artificial or electronic components. Thus descriptions such as bionic human and human with artificial parts are included in the broad usage of the term.

22. What is the largest artificial object in space?

• A. ISS (International Space Station)
• B. AI powered robot
• C. Parabolic aircraft
• D. None of the above

Explanation: The International Space Station is the largest human-made structure in orbit, assembled from many pressurised modules and large solar arrays. The other listed objects are not comparable orbital structures.

23. The two elements that are frequently used for making transistors are :

• A. Boron and aluminium
• B. Silicon and Germanium
• C. Iridium and Tungston
• D. None of these

Explanation: Silicon and germanium are semiconductors whose electrical conductivity can be controlled by doping, making them suitable for transistor construction. Boron and aluminium are commonly used as dopants, not as the main semiconductor material in this context.

24. Lingxi-03, developed by Galaxy Space, was launched using a ___________ carrier rocket.

• A. Long March-3D
• B. Long March-2D
• C. Vertical March-3D
• D. Orbital March-2D

Explanation: Lingxi-03, a Galaxy Space satellite, was launched aboard China's Long March-2D carrier rocket. The other names are either different launch vehicles or non-standard rocket names.

25. In radio, what does the FM stands for?

• A. Frequency modulation
• B. Frequency meter
• C. Fiber modulation
• D. Frequency Magnet

Explanation: FM means frequency modulation, in which information is carried by varying the frequency of a radio wave. AM, by contrast, varies the wave’s amplitude.

26. The term 'white coal' is sometimes referred to which of the following?

• A. Geothermal energy
• B. Wind energy
• C. Hydroelectricity
• D. Biomass energy

Explanation: Hydroelectricity is generated by flowing or falling water, so it is often called white coal because water power replaces the role of coal in producing electricity. The term does not refer to geothermal or wind energy.

27. The chief constituents of gobar gas is_________?

• A. Methane
• B. Oxygen
• C. Hydrogen
• D. Carbon monoxide

Explanation: Gobar gas, or biogas produced from animal dung, is mainly methane, which burns as its fuel component. It also contains carbon dioxide and small amounts of other gases, but not oxygen as its chief constituent.

28. What is 'Tokamak' ?

• A. An Israeli radar system
• B. An American anti-missile system
• C. A defence collaboration between Japan and South Korea
• D. A device used in nuclear-fusion research for magnetic confinement of plasma

Explanation: A tokamak is a doughnut-shaped device that uses magnetic fields to confine extremely hot plasma for nuclear-fusion research. Magnetic confinement prevents the plasma from directly touching the vessel walls.

29. The audio signals of TV are _____________?

• A. Amplitude modulated
• B. Frequency modulated
• C. fixe modulated
• D. Velocity modulated

Explanation: Television sound is commonly transmitted by frequency modulation, which resists many amplitude-noise disturbances. Television pictures are generally amplitude-modulated, creating the common trap.

30. Which among the following waves is used for communication by artificial satellites ?

• A. Micro waves
• B. Radio waves
• C. A. M.
• D. Infra-red waves

Explanation: Artificial satellites commonly use microwaves because they have short wavelengths, carry large amounts of information, and pass through the atmosphere with relatively little absorption. They are a high-frequency portion of the radio-wave spectrum.