Free Technology and Energy MCQs with Answers
109 Technology and Energy MCQs from Everyday Science, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Technology and energy include simple machines, engines, generators, transformers, computers, communication systems, satellites and common electronic devices. Coverage compares fossil fuels, hydroelectricity, solar, wind, geothermal, biomass and nuclear energy, explaining efficiency, transmission, storage and environmental effects while distinguishing renewable sources from non-renewable sources.
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109 questions · page 1 of 6
- A. Light Emitting Diode
- B. Low Energy Device
- C. Linear Electric Display
- D. Light Enhanced Detector
Explanation: LED stands for Light Emitting Diode — a semiconductor that emits light when current flows through it in the forward direction.
Correct answer: Light Emitting Diode- A. Wind
- B. Solar
- C. Biomass
- D. None of these
Explanation: Uneven heating of Earth creates differences in air pressure, causing air to move from high-pressure to low-pressure regions as wind.
Correct answer: Wind- A. Motor.
- B. Transformer.
- C. Coil.
- D. Generator.
Explanation: A generator uses mechanical motion to produce electrical energy through electromagnetic induction.
Correct answer: Generator.- A. Brick kilns
- B. Children toys
- C. Kitchen utilities
- D. Electric wires
Explanation: Copper is highly useful for electric wires because it conducts electricity well and can be drawn into thin, flexible wires.
Correct answer: Electric wires- A. Conductors
- B. Diodes
- C. Transistors
- D. None of these
Explanation: Transistors replaced bulky, fragile vacuum tubes because they are smaller, more reliable, require less power and produce less heat.
Correct answer: Transistors- A. France
- B. USA
- C. UK
- D. none
Explanation: The United States has generally produced the greatest total amount of nuclear-generated electricity because it operates a large nuclear…
Correct answer: USA- A. River Sutlaj
- B. River Jhelum
- C. River Chenab
- D. None (On Indus River in Gilgit-Baltistan)
Explanation: The Diamer-Bhasha Dam is planned on the Indus River in Gilgit-Baltistan, not on the Sutlej, Jhelum or Chenab.
Correct answer: None (On Indus River in Gilgit-Baltistan)- A. A device which when attached to an aircraft makes it invisible on the radar
- B. A coating which reduces the visibility of an aircraft on radar
- C. A Technology by which it is possible for the aircraft's to spy in the enemy air-space
- D. A technology by using which paratroopers can be dropped stealthily behind the enemy columns.
Explanation: Stealth technology reduces an aircraft's radar signature through shaping, radar-absorbing materials and other design measures.
Correct answer: A coating which reduces the visibility of an aircraft on radar- A. Current
- B. Voltage
- C. Nuclear Radiation
- D. power
- E. None of these
Explanation: A Geiger-Müller counter detects ionising nuclear radiation such as alpha, beta and gamma radiation.
Correct answer: Nuclear Radiation- A. Chemical Reaction
- B. Nuclear reaction
- C. Fission nuclear reaction
- D. Fusion nuclear reaction
- E. None of these
Explanation: Nuclear fusion joins two or more light nuclei to form a heavier nucleus and releases energy.
Correct answer: Fusion nuclear reaction- A. Accelerate the neutrons
- B. Slow down the speed of the neutrons
- C. Increase the number of elections
- D. Decrease the number of electrons
- E. None of these
Explanation: A moderator reduces the speed of fast neutrons, commonly using materials such as water or graphite.
Correct answer: Slow down the speed of the neutrons- A. Uranium Oxide
- B. Uranium Plutonium carbide
- C. Uranium Plutonium Oxide
- D. Uranium thorium Oxide
- E. None of these
Explanation: Fast breeder reactors commonly use mixed uranium-plutonium oxide fuel, called MOX fuel.
Correct answer: Uranium Plutonium Oxide- A. Heating
- B. Beating
- C. Artificial nuclear radioactivity
- D. Chemical reaction
Explanation: Changing one element into another requires nuclear transmutation, which changes the atomic nucleus and hence the atomic number.
Correct answer: Artificial nuclear radioactivity- A. 92 U 235
- B. 92 U 234
- C. 92 U 233
- D. 92 U 238
Explanation: Uranium-235 is fissile, meaning it can sustain a rapid chain reaction with slow neutrons and is therefore used in nuclear weapons.
Correct answer: 92 U 235- A. Anemometer
- B. Battery
- C. Galvanometer
- D. Rectifier
Explanation: A rectifier uses diodes to allow current mainly in one direction, converting alternating current into direct current.
Correct answer: Rectifier- A. Potential
- B. Transverse
- C. Kinetic
- D. Mechanical
Explanation: Moving air possesses kinetic energy because its energy depends on motion.
Correct answer: Kinetic- A. Global Poles System
- B. Global PolySiliconium Store
- C. Global Positioning System
- D. Global Position Structure
Explanation: GPS stands for Global Positioning System. Satellites transmit timed signals that allow a receiver to calculate its position on Earth.
Correct answer: Global Positioning System18. CNG stands for?
- A. Converted Natural Gas
- B. Conduced Natural Gas
- C. Conducted Natural Gas
- D. Compressed Natural Gas
Explanation: CNG means compressed natural gas, in which natural gas is stored at high pressure for use as a fuel.
Correct answer: Compressed Natural Gas- A. Aluminium
- B. Gold
- C. Graphite
- D. All are conductors
Explanation: Aluminium, gold and graphite can all conduct electricity, although graphite is a non-metal conductor.
Correct answer: All are conductors- A. motor
- B. generator
- C. moving-coil meter
- D. battery
Explanation: A battery converts chemical energy into electrical energy through chemical reactions at its electrodes.
Correct answer: batteryTechnology and Energy MCQs: common questions
Are these Technology and Energy MCQs free?
Yes. All Technology and Energy MCQs from Everyday Science are free on TestUstad, with unlimited attempts and no account needed. Nothing on this page is a sample or a trial.
How many Technology and Energy MCQs are on this page?
There are 109 Technology and Energy MCQs in the Everyday Science bank, shown 20 to a page with the correct answer and an explanation on each.
Does every Technology and Energy MCQ have an explanation?
Yes. Each Technology and Energy question shows the correct option and a written explanation of why it is correct, so a wrong answer teaches you something rather than just being marked wrong.
Can I take a timed Technology and Energy test?
Yes. The practice button on this page starts a free Technology and Energy test drawn from the Everyday Science bank. It marks each answer instantly, gives you a score at the end, and can be retaken as many times as you like.