Everyday Inventions — Set 4
Inventions · रोजमर्रा के आविष्कार · Questions 31–40 of 70
The invention of the stethoscope to listen to internal body sounds was by?
Correct Answer: B. Rene Laennec
Rene Laennec invented the wooden tube stethoscope in 1816 because he was uncomfortable placing his ear directly on a patient's chest. It allowed doctors to diagnose heart and lung conditions more accurately. Before this, diagnosis was often based only on external symptoms.
Who is credited with the invention of the first successful hovercraft in 1955?
Correct Answer: D. Christopher Cockerell
Christopher Cockerell used an air-cushion design to allow vehicles to glide over various surfaces. He proved the concept using a vacuum cleaner motor and two tin cans. This technology became popular for high-speed ferry transport.
The invention of the parachute is often linked to early sketches by which Renaissance polymath?
Correct Answer: B. Leonardo da Vinci
Leonardo da Vinci drew a pyramid-shaped parachute in his notebooks around 1485. The first practical parachute was later built and tested by Louis-Sebastien Lenormand in 1783. Da Vinci's design was successfully tested by a skydiver in the year 2000.
Who invented the first practical handheld mobile phone in 1973?
Correct Answer: D. Martin Cooper
Martin Cooper, an engineer at Motorola, made the first public mobile call from a New York street. The device was bulky and nicknamed 'the brick' due to its size and weight. This invention eventually transformed global connectivity and personal technology.
The invention of the Braille writing system for the blind was by?
Correct Answer: A. Louis Braille
Louis Braille developed a system of raised dots when he was just 15 years old in 1824. He based it on a military code used for reading messages in the dark. This system empowered blind people to read and write independently for the first time.
Who is credited with the invention of the first practical airplane in 1903?
Correct Answer: D. Wright Brothers
Orville and Wilbur Wright achieved the first controlled, powered, and sustained flight of a heavier-than-air aircraft. They conducted their historic tests at Kitty Hawk, North Carolina. Their success was based on years of systematic research into aerodynamics and control.
The invention of the vacuum cleaner, originally a large horse-drawn machine, was by?
Correct Answer: B. Hubert Cecil Booth
Hubert Cecil Booth invented the first powered vacuum cleaner in 1901. Unlike earlier blowers, his machine sucked up dust through a cloth filter. It was so large that it stayed on the street while long hoses were brought into buildings.
Who invented the first successful safety match in 1844?
Correct Answer: D. Gustaf Erik Pasch
Gustaf Erik Pasch invented the safety match by separating the chemicals between the match head and the striking surface. Earlier 'friction matches' were dangerous because they could ignite accidentally in a pocket. This invention made fire-starting a safe and easy everyday task.
The invention of the first electronic television system is attributed to?
Correct Answer: B. Philo Farnsworth
Philo Farnsworth developed the first all-electronic television system using a cathode ray tube. While John Logie Baird demonstrated a mechanical system earlier, Farnsworth's electronic method became the industry standard. He conceived the idea while observing the straight lines of a plowed field.
Who invented the first practical typewriter with a QWERTY keyboard layout?
Correct Answer: A. Christopher Sholes
Christopher Sholes developed the QWERTY layout to prevent the mechanical arms of early typewriters from jamming. By separating common letter pairs, he allowed for faster typing without mechanical errors. This layout remains the standard for computer keyboards today.