Invention, Innovation & Engineering Organized By Techno Club Ccet, Bhilai
How Much Do You Know About Engineering?
Questions and Answers
- 1.
What simple machine can be described as an inclined plane wrapped around a pole?
- A.
Wheelbarrow
- B.
Pulley
- C.
Wedge
- D.
Screw
Correct Answer
D. ScrewExplanation
A screw can be described as an inclined plane wrapped around a pole. As the screw is turned, it moves through a material, such as wood or metal, creating a thread-like path. This allows the screw to be easily inserted or removed from the material. The inclined plane shape of the screw's threads helps to distribute force and make it easier to apply rotational force to the screw. Therefore, a screw is the simple machine that fits the description given.Rate this question:
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- 2.
What tiny electricity amplifyier which can switch on and off was used in radios and computers?
- A.
Diode
- B.
Audion
- C.
Capacitor
- D.
Transistor
Correct Answer
D. TransistorExplanation
A transistor is a tiny electricity amplifier that can switch on and off. It was commonly used in radios and computers because it allowed for the amplification and control of electrical signals. Unlike a diode or a capacitor, a transistor has the ability to amplify signals, making it an essential component in electronic devices. An audion is an outdated vacuum tube amplifier and not commonly used in modern radios and computers. Therefore, the correct answer is transistor.Rate this question:
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- 3.
What unit of power, 1/746th horsepower or one volt times one amp, was named for a Scottish inventor?
- A.
A Joule
- B.
A Watt
- C.
An Erg
- D.
A Dyne
Correct Answer
B. A WattExplanation
The unit of power that was named for a Scottish inventor is a Watt. A Watt is defined as one volt times one ampere and is commonly used to measure the rate at which work is done or energy is transferred. The unit was named after James Watt, a Scottish engineer and inventor who made significant contributions to the development of the steam engine.Rate this question:
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- 4.
What medical device uses echoes of high-frequency sound waves to produce images?
- A.
Ultrasound
- B.
Magnetic Resonance Imager
- C.
PET Scan
- D.
CAT Scan
Correct Answer
A. UltrasoundExplanation
Ultrasound is a medical device that uses echoes of high-frequency sound waves to produce images. It works by emitting sound waves into the body and capturing the echoes that bounce back. These echoes are then converted into visual images, allowing medical professionals to examine internal organs, tissues, and blood flow. Ultrasound is commonly used for imaging during pregnancy, diagnosing conditions in the abdomen and pelvis, and guiding medical procedures such as biopsies. It is a non-invasive and safe imaging technique, making it a valuable tool in the medical field.Rate this question:
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- 5.
Which of the following is used in pencils?
- A.
Graphite
- B.
Silicon
- C.
Charcoal
- D.
Phosphorous
Correct Answer
A. GraphiteExplanation
Graphite is the correct answer because it is commonly used in pencils. Graphite is a form of carbon that has a layered structure, allowing it to easily leave marks on paper when pressure is applied. It is known for its smoothness and ability to create dark lines, making it an ideal material for writing and drawing instruments like pencils. Silicon, charcoal, and phosphorous are not typically used in pencils.Rate this question:
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- 6.
Reading of barometer going down is an indication of?
- A.
Snow
- B.
Storm
- C.
Intense heat
- D.
Rainfall
Correct Answer
D. RainfallExplanation
A barometer measures atmospheric pressure, and a decrease in pressure indicates that the weather is changing. When the reading goes down, it suggests that the pressure is dropping, which typically occurs before rainfall. Therefore, a reading of a barometer going down is an indication of rainfall.Rate this question:
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- 7.
Which one of the following is the fastest train in the world
- A.
Manglev Train
- B.
Fuxing Train
- C.
Hayabusa Shinkansen E5
- D.
Harmony CRH380A
Correct Answer
B. Fuxing TrainExplanation
The Fuxing Train is the correct answer because it is currently the fastest train in the world. It is a high-speed bullet train that operates in China and can reach a top speed of 350 km/h (217 mph). The Fuxing Train is known for its advanced technology and efficient design, making it the fastest and most reliable train in operation.Rate this question:
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- 8.
Latest robot based on Artificial Intelligence.
- A.
Talos
- B.
Golem
- C.
Sophia
- D.
Hadaly
Correct Answer
C. SophiaExplanation
Sophia is the correct answer because it is the latest robot based on Artificial Intelligence. The question is asking for the most recent robot that utilizes AI technology, and Sophia fits this description. Talos, Golem, and Hadaly are not specified as being AI-based or the latest, so they are not the correct answer.Rate this question:
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- 9.
Who invented the lightbulb?
- A.
Mr. Man
- B.
Thomas Edison
- C.
Albert Einstein
- D.
All of the above
Correct Answer
B. Thomas EdisonExplanation
Thomas Edison is credited with inventing the lightbulb. He developed and patented a practical and commercially viable incandescent lightbulb in 1879. Edison's invention revolutionized the way we illuminate our homes and workplaces, making it safer and more convenient. While Albert Einstein made significant contributions to the field of physics, he did not invent the lightbulb. "Mr. Man" is not a known inventor and is not associated with the invention of the lightbulb. Therefore, the correct answer is Thomas Edison.Rate this question:
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- 10.
What is html?
- A.
Program
- B.
Web page
- C.
Food
- D.
Web Browser
- E.
All of the above
Correct Answer
B. Web pageExplanation
HTML stands for Hypertext Markup Language. It is the standard markup language used for creating web pages. It is not a program or a type of food. A web page is a document that is displayed on a web browser and is created using HTML. Therefore, the correct answer is "Web page."Rate this question:
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- 11.
What does www stand for?
- A.
World Wide Wickedness
- B.
Wide World Web
- C.
World of Warcraft
- D.
World Wide Web
- E.
All of the above
Correct Answer
D. World Wide WebExplanation
The correct answer is "World Wide Web". The term "www" stands for World Wide Web, which is a system of interconnected documents and other resources, linked by hyperlinks and URLs. It is a global information space that can be accessed through the internet. The other options mentioned in the question, such as "World Wide Wickedness", "Wide World Web", "World of Warcraft", are incorrect and do not represent the correct meaning of "www".Rate this question:
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- 12.
What is the meaning of the acronym CPU ?
- A.
Centrally Provided Users
- B.
Centric Processing Unit
- C.
Central Processing Unit
- D.
Creepy Pointed Unit
- E.
None of the above
Correct Answer
C. Central Processing UnitExplanation
The acronym CPU stands for Central Processing Unit. It is the primary component of a computer that performs most of the processing inside the computer. The CPU interprets and executes instructions from the computer's memory, performing basic arithmetic, logical, control, and input/output operations. It is often referred to as the "brain" of the computer, as it is responsible for carrying out all the necessary calculations and operations to run the computer's programs and functions.Rate this question:
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- 13.
Who founded Apple Computers ?
- A.
Steve Jobs
- B.
Steve Jobs and Steve Wozniak
- C.
Bill Gates
- D.
Howard Aiken
- E.
Grace Hopper
Correct Answer
B. Steve Jobs and Steve WozniakExplanation
Steve Jobs and Steve Wozniak founded Apple Computers. They started the company in 1976 and played crucial roles in its early success. Jobs was responsible for the marketing and vision of the company, while Wozniak designed the Apple I and Apple II computers. Together, they revolutionized the personal computer industry and laid the foundation for Apple's future innovations.Rate this question:
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- 14.
An object is weightless when it is:
- A.
In motion
- B.
Being accelerated
- C.
In freefall
- D.
Stationary
Correct Answer
C. In freefallExplanation
For a body to be weightless, it must be in freefall.Rate this question:
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- 15.
Which one among the following units cannot be used to express work?
- A.
Calorie
- B.
Joule
- C.
Newton
- D.
Watt-second
Correct Answer
C. NewtonExplanation
Newton(N) is a unit of force.Rate this question:
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- 16.
Which of the following is an appropriate derived unit for Tesla?
- A.
Volts per square meter
- B.
Amperes per second
- C.
Farads per Volt-second
- D.
Weber per square meter
Correct Answer
D. Weber per square meterExplanation
Tesla is a unit for magnetic flux density. The unit for magnetic flux is the weber, therefore, dividing the magnetic flux by the area gives you the magnetic flux density.Rate this question:
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- 17.
Which scientist discovered the radioactive element radium?
- A.
Isaac Newton
- B.
Albert Einstein
- C.
Benjamin Franklin
- D.
Marie Curie
Correct Answer
D. Marie CurieExplanation
Marie Curie is the correct answer because she was a renowned scientist who made significant contributions to the field of radioactivity. Alongside her husband, Pierre Curie, she discovered the radioactive elements polonium and radium. Her groundbreaking research on radioactivity led to the development of the theory of atomic structure and earned her two Nobel Prizes, making her the first woman to ever receive this prestigious honor. Curie's discoveries revolutionized the understanding of radioactivity and laid the foundation for further advancements in nuclear physics.Rate this question:
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- 18.
What Galileo invented?
- A.
Barometer
- B.
Pendulum clock
- C.
Microscope
- D.
Thermometer
Correct Answer
D. ThermometerExplanation
Galileo invented the thermometer. He is credited with inventing a device that could measure temperature accurately. Galileo's thermometer consisted of a glass tube filled with a liquid such as water or alcohol. As the temperature changed, the liquid would expand or contract, causing it to rise or fall in the tube. This invention revolutionized the field of temperature measurement and laid the foundation for modern thermometers.Rate this question:
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- 19.
What pH are acids?
- A.
PH7
- B.
PH
- C.
PH>7
Correct Answer
B. PHExplanation
Acids have a pH value below 7. This is because pH is a measure of the concentration of hydrogen ions in a solution, and acids release hydrogen ions when dissolved in water. The more hydrogen ions present, the lower the pH value. A pH value of 7 is considered neutral, so acids have a pH below 7.Rate this question:
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- 20.
How many carbon atoms are there in pentane?
- A.
1
- B.
2
- C.
3
- D.
4
- E.
5
Correct Answer
E. 5Explanation
Pentane is a hydrocarbon with the chemical formula C5H12. The formula indicates that there are 5 carbon atoms in pentane. Therefore, the correct answer is 5.Rate this question:
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- 21.
______ is the name given to the substance that dissolves.
- A.
Solution
- B.
Solute
- C.
Solvent
- D.
Dilute solutions
- E.
Solubility
Correct Answer
B. SoluteExplanation
The term "solute" is used to describe the substance that dissolves in a solution. In a solution, the solute is the component that is present in a smaller quantity and gets dissolved by the solvent. The solvent, on the other hand, is the component that is present in a larger quantity and does the dissolving. Therefore, "solute" is the correct answer as it accurately represents the substance that dissolves in a solution.Rate this question:
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- 22.
Write the name of the compound CCl4
- A.
Carbon Tetrachlorate
- B.
Carbon Chloride
- C.
Carbonic Acid
- D.
Carbon Tetrachloride
Correct Answer
D. Carbon TetrachlorideExplanation
The correct answer is Carbon Tetrachloride. Carbon tetrachloride is a compound composed of one carbon atom and four chlorine atoms. It is commonly used as a solvent, although its use has decreased due to its harmful effects on human health and the environment.Rate this question:
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- 23.
Elements in the middle of the periodic table are ___
- A.
Alkaline Earth Metals
- B.
Rare Earth Metals
- C.
Halogens
- D.
Transition Metalloids
- E.
None of the Above
Correct Answer
E. None of the AboveExplanation
The elements in the middle of the periodic table are not categorized as Alkaline Earth Metals, Rare Earth Metals, Halogens, or Transition Metalloids. These elements belong to a different group or category.Rate this question:
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- 24.
In which situation is a chemical reaction occurring?
- A.
Salt dissolving in water
- B.
A nail rusting
- C.
Ice melting
- D.
A glass window breaking
Correct Answer
B. A nail rustingExplanation
A chemical reaction is occurring when a nail rusts. Rusting is a chemical process that involves the reaction of iron with oxygen in the presence of water or moisture. This reaction leads to the formation of iron oxide, which is commonly known as rust. Therefore, the rusting of a nail is a clear example of a chemical reaction taking place.Rate this question:
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- 25.
A hydrocarbon is composed of –
- A.
Carbons only
- B.
Carbon, hydrogen, and other atoms
- C.
Carbon and hydrogen only
- D.
Carbon plus a variety of other elements
Correct Answer
C. Carbon and hydrogen onlyExplanation
A hydrocarbon is a compound made up of only carbon and hydrogen atoms. It does not contain any other elements.Rate this question:
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- 26.
The term _______ refers to the computer's physical components, such as the monitor, keyboard, memory chips, and hard drive.
- A.
Software
- B.
Hardware
- C.
Firmware
- D.
Output
Correct Answer
B. HardwareExplanation
The term "hardware" refers to the physical components of a computer, including the monitor, keyboard, memory chips, and hard drive. These are tangible objects that can be seen and touched. Software, on the other hand, refers to the programs and instructions that tell the hardware what to do. Firmware is a type of software that is permanently stored on a hardware device, such as a computer's BIOS. Output refers to the information or data that is produced by a computer system.Rate this question:
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- 27.
The ___________ writes data and instructions in storage devices and performs calculations and other data processing.
- A.
CPU
- B.
Port
- C.
Monitor
- D.
RAM
Correct Answer
A. CPUExplanation
The CPU, or Central Processing Unit, is responsible for writing data and instructions in storage devices and performing calculations and other data processing. It is the "brain" of the computer, executing instructions and coordinating the activities of all the other hardware components. The CPU is responsible for fetching, decoding, and executing instructions, as well as performing arithmetic and logical operations. It interacts with the computer's memory and storage devices to read and write data, and it controls the flow of data within the computer system.Rate this question:
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- 28.
1,000 characters are equal to what? (2 correct answers)
- A.
1,000 bytes
- B.
1 kilobyte
- C.
1 gigabyte
- D.
1 megabyte
Correct Answer(s)
A. 1,000 bytes
B. 1 kilobyteExplanation
The correct answers for this question are 1,000 bytes and 1 kilobyte. Both of these options represent the same amount of data, as 1 kilobyte is equal to 1,000 bytes. In computer storage, bytes are used to measure the size of data, and kilobytes are a common unit for representing larger amounts of data. Therefore, 1,000 characters would be equal to either 1,000 bytes or 1 kilobyte.Rate this question:
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- 29.
1,000 megabytes =
- A.
1,000 gigibytes
- B.
1 gigibyte
- C.
1,000 kilobytes
- D.
1 gigabyte
Correct Answer
D. 1 gigabyteExplanation
1,000 megabytes is equal to 1 gigabyte. A gigabyte is a unit of digital information that is equivalent to 1,000 megabytes. Therefore, the correct answer is 1 gigabyte.Rate this question:
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- 30.
CPU is also known as what of the computer?
- A.
Eye
- B.
Brain
- C.
Main Part
- D.
Hardware
Correct Answer
B. BrainExplanation
The CPU, or Central Processing Unit, is often referred to as the "brain" of the computer. This is because it is responsible for executing instructions, performing calculations, and managing the overall operation of the computer system, just like the brain controls and coordinates the functions of the human body. The CPU acts as the main part of the computer, functioning as the hardware component that carries out the majority of the computer's processing tasks.Rate this question:
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- 31.
The anwer was written _____ blue ink.
- A.
With
- B.
By
- C.
In
- D.
On
Correct Answer
C. InExplanation
The answer was written in blue ink.Rate this question:
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- 32.
Which word is odd one out?
- A.
Drop
- B.
Hasten
- C.
Surge
- D.
Rush
Correct Answer
A. DropExplanation
The word "drop" is the odd one out because it is the only word that implies a downward movement or decrease in intensity, while the other three words (hasten, surge, rush) all imply a quick or sudden increase in speed or intensity.Rate this question:
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- 33.
What color is a black light bulb?
- A.
Yellow
- B.
Green
- C.
Purple
- D.
Blue
Correct Answer
C. PurpleExplanation
A black light bulb emits ultraviolet (UV) light, which is not visible to the human eye. However, when the UV light interacts with certain materials, it causes them to fluoresce, or emit visible light. The most common color that is associated with black light bulbs is purple, as this is the color that is often seen when objects or substances fluoresce under UV light. Therefore, the correct answer is purple.Rate this question:
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- 34.
What general name is also given to natural satellites?
- A.
Star
- B.
Saturn
- C.
Moon
- D.
Nova
Correct Answer
C. MoonExplanation
The general name given to natural satellites is "moon". This term refers to any natural object that orbits around a planet or a similar celestial body. Moons can be found in our own solar system, such as Earth's moon, as well as in other planetary systems. They vary in size and composition, and play an important role in the dynamics and stability of their host planets. Therefore, "moon" is the correct answer as it encompasses all natural satellites, regardless of their specific characteristics.Rate this question:
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- 35.
What is a unit that measures force?
- A.
Newton
- B.
Kelvin
- C.
Gauss
- D.
Watt-Hour
Correct Answer
A. NewtonExplanation
A unit that measures force is called a Newton. The Newton is the International System of Units (SI) derived unit of force. It is defined as the force required to accelerate a one-kilogram mass by one meter per second squared. Named after Sir Isaac Newton, this unit is commonly used in physics and engineering to quantify the amount of force exerted on an object.Rate this question:
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- 36.
What state the first law of Thermodynamics?
- A.
Conservation of Energy
- B.
Conservation of Mass
- C.
Conservation of Momentum
- D.
Conservation of Charge
Correct Answer
A. Conservation of EnergyExplanation
The first law of thermodynamics states that energy cannot be created or destroyed, only transferred or converted from one form to another. This principle is known as the conservation of energy. It means that the total energy of a closed system remains constant over time. This law is fundamental in understanding and analyzing energy systems and processes, including heat transfer and work done.Rate this question:
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- 37.
Steel is an alloy between iron and...?
- A.
Copper
- B.
Bronze
- C.
Carbon
- D.
Chromium
- E.
Silver
Correct Answer
C. CarbonExplanation
Steel is an alloy between iron and carbon. Carbon is added to iron in varying amounts to create steel, which enhances its strength, hardness, and other desirable properties. The presence of carbon allows steel to be more resistant to corrosion, more durable, and easier to work with compared to pure iron. Therefore, carbon is the correct answer in this case.Rate this question:
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- 38.
The mechanical engineering field requires core understanding of which of the following core areas?
- A.
Dynamics
- B.
Mechanics
- C.
Electricity
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
The correct answer is "All of the above" because the field of mechanical engineering encompasses a wide range of topics and disciplines. Dynamics is important for studying the motion and forces in mechanical systems, mechanics is essential for understanding the behavior of materials and structures, and electricity plays a crucial role in various applications such as control systems and power generation. Therefore, a core understanding of all these areas is necessary for a mechanical engineer to effectively design and analyze mechanical systems.Rate this question:
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- 39.
The combination of mechanics and electronics is called?
- A.
Mechatronics
- B.
Mechanical Electronics
- C.
All of the above
- D.
None of the above
Correct Answer
A. MechatronicsExplanation
Mechatronics is the correct answer because it refers to the combination of mechanics and electronics. It is a multidisciplinary field that integrates mechanical engineering, electronics, computer science, and control engineering to design and create intelligent systems and products. Mechatronics combines the mechanical aspects of engineering with the electrical and electronic components, allowing for the development of advanced and automated systems.Rate this question:
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- 40.
What does the "giga" stand for?
- A.
One million
- B.
One billion
- C.
One trillion
- D.
1024
Correct Answer
B. One billionExplanation
The prefix "giga" is commonly used to denote one billion. In the metric system, it represents a factor of 10^9, which is equivalent to one billion. This prefix is often used in technology and computing to represent large quantities of data or processing power. Therefore, the correct answer is "one billion."Rate this question:
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- 41.
Current flowing in the conductor due to.
- A.
Protons
- B.
Motion of electron in it
- C.
Motion of free electron and holes
- D.
Motion of positive ion
Correct Answer
C. Motion of free electron and holesExplanation
The correct answer is "motion of free electron and holes." In a conductor, electric current is the flow of charged particles. In this case, the motion of free electrons and holes (positively charged vacancies) contribute to the current flow. Free electrons move in one direction, while holes move in the opposite direction. This motion of charged particles creates an overall flow of current in the conductor.Rate this question:
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- 42.
Which of the following refers to be the fastest:
- A.
Notebook
- B.
Personal computer
- C.
Mobile
- D.
Super computer
Correct Answer
D. Super computerExplanation
A supercomputer refers to be the fastest among the given options. Supercomputers are high-performance computers designed to handle complex calculations and process large amounts of data at incredibly fast speeds. They are used for tasks that require immense computational power, such as weather forecasting, scientific research, and simulations. Supercomputers are capable of performing trillions of calculations per second, far surpassing the processing capabilities of other devices like notebooks, personal computers, and mobile phones.Rate this question:
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- 43.
The condition that causes vapour locking in the braking sysytem
- A.
Overheating of the fluid due to the frequent braking application
- B.
Overcooling of the brakes during high speed driving
- C.
Keeping the vehicle without use for an extended period
- D.
An excessively high engine spped on a downhill road
Correct Answer
A. Overheating of the fluid due to the frequent braking applicationExplanation
Vapour locking in the braking system occurs when the brake fluid gets too hot, causing it to vaporize and form gas bubbles. This can happen when the fluid overheats due to frequent braking application. As the brake fluid vaporizes, it becomes compressible, leading to a loss of braking effectiveness. Therefore, overheating of the fluid due to frequent braking application is the condition that causes vapour locking in the braking system.Rate this question:
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- 44.
Who invented the fuel cells
- A.
Joyce Hall
- B.
Sir William Groove
- C.
Slyvester Graham
- D.
Buckminster Fuller
Correct Answer
B. Sir William GrooveExplanation
Sir William Grove is credited with inventing the fuel cell. He developed the concept of the fuel cell in the early 19th century and demonstrated its functionality by producing electricity through the reaction between hydrogen and oxygen. His work laid the foundation for the development of fuel cell technology, which is now used in various applications such as power generation and transportation.Rate this question:
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