Engineers Quiz Questions And Answers

The correct answer is "Light Amplification by Stimulated Emission of Radiation." The acronym LASER refers to a device that emits a coherent beam of light through the process of stimulated emission. This process involves the release of photons that are in phase and have the same wavelength and direction as the incident photons. This acronym accurately represents the fundamental principle behind the operation of a laser.

Facebook currently has approximately 1.3 billion users.

Damping is a method used in synchro receivers to prevent the rotor from spinning or oscillating. It involves reducing the amplitude of the rotor's motion over time, thereby stabilizing it and preventing any unwanted movement. This is achieved by dissipating the energy of the rotor's motion through various means, such as friction or resistance, ultimately resulting in a controlled and stable rotor position.

Atoms are the fundamental building blocks of all matter, whether it is in the form of a liquid, solid, or gas. Atoms are composed of subatomic particles, such as protons and neutrons in the nucleus, surrounded by electrons in the electron cloud. These atoms combine to form molecules, which in turn make up all the substances we encounter in our daily lives. Therefore, atoms are the correct answer as they are the basic units that compose all matter.

Thomas Savery is credited with inventing the steam engine, which was a device that converted heated water into motion. This invention was a significant development in the Industrial Revolution and played a crucial role in powering machinery and transportation systems. The steam engine utilized the expansion of steam to generate power, leading to advancements in industries such as mining, manufacturing, and transportation.

Nirmala Sitharaman is the correct answer because she served as the Minister of Defence in India. She held this position from September 2017 to May 2019, making her the first female Defence Minister of India. Prior to her appointment, she had a background in economics and finance, having worked in the corporate sector and served as a Minister of State for Commerce and Industry. During her tenure as Defence Minister, she played a crucial role in various defense-related policies and initiatives, including the modernization of the armed forces and strengthening India's defense capabilities.

The statement that "Bronze is an element" is false. Bronze is not an element but rather an alloy, which is a mixture of copper and tin. An element is a pure substance that cannot be broken down into simpler substances by chemical means.

The Bugatti Veyron is the correct answer because it is widely known as one of the fastest cars in the world. It holds multiple speed records and has a top speed of over 250 mph. The other options, Ford Mustang, Ford GT, and Subaru Legacy, are not as renowned for their speed capabilities compared to the Bugatti Veyron.

Engineers Day is celebrated in India on September 15th. This day is dedicated to commemorating the birthday of Sir Mokshagundam Visvesvaraya, an eminent Indian engineer and statesman. Sir Visvesvaraya made significant contributions to the field of engineering in India, including the construction of dams and irrigation systems. His work has had a lasting impact on the country's infrastructure and development. Thus, September 15th is celebrated as Engineers Day to honor his achievements and recognize the contributions of engineers to society.

Russia is the correct answer because it is the largest country in the world in terms of land area. With a total area of about 17.1 million square kilometers, Russia covers a vast territory spanning across Europe and Asia. It is larger than any other country, including Brazil, Argentina, Australia, and the USA.

Dies are not used to cut threads on a workpiece. Instead, dies are used to create threads on external cylindrical surfaces, such as bolts or pipes. The process of using a die to create threads is called threading. Therefore, the correct answer is False.

The Pacific Ocean is the largest ocean on Earth. It covers an area of about 63 million square miles, making it larger than all the other oceans combined. It stretches from the Arctic in the north to the Southern Ocean in the south, and from the Americas in the east to Asia and Australia in the west. It is known for its vastness and its numerous islands, including Hawaii and the Galapagos Islands. The Pacific Ocean is also home to the Mariana Trench, the deepest point in the world's oceans.

Cast irons are commonly used materials in most engine combustion chambers due to their high strength, durability, and heat resistance properties. They can withstand the high temperatures and pressures generated during the combustion process without deforming or cracking. Additionally, cast irons have good thermal conductivity, which helps in dissipating heat efficiently. These qualities make cast irons an ideal choice for engine combustion chambers, ensuring reliable and efficient engine performance.

Cast irons are not used as bridge supports, under-chassis of transportation vehicles, and other structures that support heavy loads because they are not impact resistant. This means that they are prone to cracking or breaking under high impact or sudden loads. Therefore, it is true that cast irons are not suitable for these applications where impact resistance is crucial for safety and structural integrity.

The Ford Model T is considered to be the first production car because it was the first automobile to be mass-produced on assembly lines using interchangeable parts. This innovation made the Model T affordable and accessible to the average consumer, revolutionizing the automotive industry. The Model T was introduced in 1908 and remained in production until 1927, selling over 15 million units and establishing Ford as a leading car manufacturer. Its impact on society and the automotive industry solidifies its status as the first production car.

In a NPN transistor, the electron flow occurs from the emitter to the collector. The emitter is the region where the electrons are emitted or injected into the transistor, while the collector is the region where the electrons are collected or absorbed. This flow of electrons allows the transistor to amplify or control the current flowing through it.

The correct answer is "any of the above." This means that a 3-phase synchronous motor will not start if the voltage is too low, if one phase is open, or if the connections are faulty. These are all potential reasons for the motor's failure to start, and any one of them can prevent the motor from functioning properly.

A helical gear is a type of gear that has teeth that are cut at an angle. This angle allows for a smoother and quieter operation compared to other types of gears. The helical gear is commonly used in various applications such as automotive transmissions, industrial machinery, and power tools. It is known for its high efficiency and ability to transmit large amounts of power.

Maradona's last name is not provided in the options, but his full name is Diego Armando Maradona. Therefore, the correct answer is Diego.

A NICAD battery, also known as a nickel-cadmium battery, is commonly used in various electronic devices due to its high energy density and long life. It can be found in a satellite, as satellites require reliable power sources for their operations. Additionally, it can be found in portable cassette players and handheld radio transceivers, as these devices often require a rechargeable battery to function. Therefore, a NICAD battery can be found in more than one of the given options.

The correct answer is Elon Musk. He is a famous tech personality known for being the CEO of Tesla, SpaceX, and Neuralink. Musk is widely recognized for his contributions to the electric vehicle industry, space exploration, and his ambitious plans for the future of technology.

Meghalaya is the correct answer because it shares its boundary with only one state, which is Assam. It does not share borders with Arunachal Pradesh or Tripura. Therefore, Meghalaya is the only state among the given options that has a single neighboring state.

Join http://www.facebook.com/learnsocialmedia to enjoy some more quizzes

Prakash Javadekar is the correct answer because he is the current Minister of Human Resource Development in India. He was appointed to this position in 2016 and has been responsible for overseeing the education sector in the country. Javadekar has implemented various reforms and policies to improve the quality of education and promote skill development among students. He has also been involved in initiatives to enhance digital learning and increase access to education for all. Overall, Javadekar's role as the Minister of Human Resource Development makes him the correct answer to this question.

An induction motor works with AC only because it operates based on the principle of electromagnetic induction. AC voltage is required to create a rotating magnetic field, which in turn induces currents in the rotor and causes it to rotate. DC voltage cannot create a rotating magnetic field, so it is not suitable for powering an induction motor. Therefore, the correct answer is AC only.

Thermoset plastics are not elastic like polymers in behavior. Unlike thermoplastics, which can be melted and re-molded multiple times, thermoset plastics undergo a chemical reaction during curing that permanently sets their shape. Once cured, thermoset plastics cannot be melted or re-molded, making them less elastic than polymers. Therefore, the statement that thermoset plastics are very elastic like polymers is false.

There are a total of 535 members in Congress.

The correct answer is 1452. This is the year when the first printing press was invented by Johannes Gutenberg in Germany. Gutenberg's invention revolutionized the way information was disseminated, making books more accessible and affordable to the general public. The printing press played a crucial role in the spread of knowledge and the advancement of literacy throughout Europe and eventually the world.

The correct answer is Golconda Fort. Golconda Fort is a historical fort located in Hyderabad, India. It was originally built as a mud fort in the 13th century and later fortified with granite walls. The fort complex includes several structures such as gateways, mosques, royal chambers, and gardens. It is known for its impressive architecture and strategic location on a hilltop. Golconda Fort has played a significant role in the history of the region and attracts tourists with its rich heritage and stunning views.

Aluminum (Al) can be used for cathodic protection of steel. Cathodic protection is a technique used to prevent corrosion of metals by making them the cathode in an electrochemical cell. Aluminum has a more negative potential than steel, so when aluminum is connected to steel in the presence of an electrolyte (such as soil or water), it acts as a sacrificial anode. This means that the aluminum will corrode instead of the steel, protecting the steel from corrosion.

Gatimaan Express is the correct answer because it is currently the fastest train in India. It operates between Delhi and Jhansi, covering a distance of 403 kilometers in just 4 hours and 25 minutes. The train has a maximum speed of 160 km/h and offers various amenities like onboard catering, Wi-Fi, and executive class seating.

A logic bomb is a type of malicious code that is triggered by the appearance or disappearance of specified data. Once triggered, it can execute a harmful action, such as deleting files or causing system crashes. Unlike a time bomb, which is triggered by a specific date or time, a logic bomb is triggered by specific data conditions. A Trojan horse is a type of malware that disguises itself as a legitimate program, while a worm is a self-replicating malware that spreads across networks. Therefore, the correct answer for the given question is logic bomb.

A Colpitts oscillator is a type of oscillator that uses a capacitive voltage divider as part of its feedback network. This voltage divider consists of two capacitors connected in series, with the junction between them tapped as the output. The capacitive voltage divider allows for the necessary phase shift and feedback to sustain oscillations. Therefore, the correct answer is b. Colpitts.

Conrad Gesner is credited with inventing the pencil. He was a Swiss naturalist and scholar who described the use of a graphite stick encased in wood to create a writing instrument in his book "Historia animalium" published in 1555. This early version of the pencil was a significant development in writing tools and laid the foundation for the modern pencil that we use today.

This is the largest island in the Tierra del Fuego Archipelago.

Jimmy Carter is the correct answer because he did graduate work in reactor technology and nuclear physics. After leaving the Navy, Carter pursued advanced studies in nuclear physics and reactor technology, which gave him a strong understanding of the subject. This knowledge later played a significant role in his presidency, as he advocated for nuclear energy and nonproliferation efforts. Carter's background in this field sets him apart from the other presidents listed, making him the correct answer to the question.

Prussia used to be a historical and cultural region in Europe, located mainly in what is now Germany. It was a powerful kingdom and later a state within the German Empire. Prussia played a significant role in the unification of Germany in the 19th century and was known for its militarism and disciplined society. Therefore, the correct answer is Germany.

Cast iron is a ferrous material that contains more than 2% carbon, not 0.01%-2%. Therefore, the statement is false. Cast iron typically contains around 2%-4% carbon, which gives it its characteristic hardness and brittleness.

As the administrator of a Facebook group, the maximum number of members you can have in your group to send a mass message to the entire group is 5,000. This means that you can send a message to all the members of the group at once without any limitations. Having more than 5,000 members would require you to send multiple messages or use other methods to communicate with all the members.

The question asks for the work holding devices used on the drill press, and the answer is "Machinist vise." This suggests that the other three options, V-block and clamp, Drill vise, and Angle plate, are all work holding devices that can be used on the drill press.

The correct answer is "None of These." This means that all of the options listed (Flickr, My Space, and LinkedIn) are considered social media applications.

The statement is false because copper and tin are the component elements of bronze, not copper and zinc. Bronze is an alloy made by combining copper and tin, whereas zinc is commonly used in the production of brass, another type of alloy.

A computer virus that makes copies of itself and consumes system resources, slowing down or halting tasks is called a worm. Unlike other types of malware, worms do not need to attach themselves to a host program or file to spread. They can independently replicate and spread across networks, causing significant damage to computer systems by overloading them with copies of themselves.

The all-pass filter is sometimes called a delay equalizer because it is designed to introduce a specific amount of delay to a signal without affecting its amplitude. This delay can be used to compensate for phase differences in a system or to create certain audio effects. The term "delay equalizer" emphasizes the filter's ability to equalize or adjust the delay in a signal, making it an appropriate name for this type of filter.

The correct answer is c. epoxy resin. Transistors are typically encapsulated in epoxy resin for protection and insulation. Epoxy resin is a durable and heat-resistant material that helps to prevent damage to the transistor from external factors such as moisture, dust, and mechanical stress. Additionally, epoxy resin provides electrical insulation to prevent short circuits and interference.

A screw can be described as an inclined plane wrapped around a pole. The inclined plane is formed by the threads on the screw, which allows it to move through a solid material by rotating. This design makes it easier to drive the screw into a surface or to hold objects together. The screw is a type of simple machine that can be used for various purposes, such as fastening objects or lifting heavy loads.

Assam is the correct answer because it is the largest oil producing state in India. Assam has several oil fields, including the Digboi oil field, which is one of the oldest oil fields in the world. The state has a long history of oil production and contributes significantly to India's overall oil production. Additionally, Assam has several oil refineries and is known for its rich reserves of crude oil and natural gas.

The Satish Dhawan Space Centre is the launch center for the Indian Space Research Organization (ISRO). It is located in Sriharikota, Andhra Pradesh, India. The center is responsible for launching various satellites, including the Geosynchronous Satellite Launch Vehicle (GSLV) and the Polar Satellite Launch Vehicle (PSLV). It is named after Satish Dhawan, who was an eminent Indian scientist and served as the chairman of ISRO from 1972 to 1984.

Tapping is the correct answer because it refers to the process of cutting internal threads by hand. It involves using a tap, which is a cutting tool with sharp threads, to create threads inside a pre-drilled hole. This method is commonly used in various industries, such as metalworking and plumbing, to create threaded holes for screws, bolts, or fittings.