scientist, discoveries & inventions MCQ section 2 MCQ Questions & Answers Detailed Explanation

Answer: (b)

Radium, in the form of radium chloride, was discovered by Marie Curie and Pierre Curie in 1898. They extracted the radium compound from uraninite. In nature, radium is found in uranium ores in trace amounts as small as a seventh of a gram per ton of uraninite.

Answer: (d)

The invention of the first automatic car is more evolutionary than the result of a single invention. Frenchmen Louis-Rene Panhard and Emile Levassor are recognized for inventing the modern transmission in 1894, but it was Thomas J. Sturtevant of Boston, Mass., who designed the first automatic transmission in 1904.

In 1938, General Motors developed the first line of cars to sport automatic transmission — Oldsmobiles that offered “Hydra-Matic drive.” The cars were introduced to the public in 1940.

In 1941, Chrysler followed suit and introduced three different cars that offered their version of the automatic drive, “Vacamatic” (later called “Fluid Drive”). Automatic transmission was a fairly common option on most American cars by 1948.

Ford-O-Matic was the first automatic transmission widely used by Ford Motor Company.

Answer: (d)

The Gyroplane Laboratoire was an early helicopter. Its designer, Frenchman Louis Breguet, had already experimented with rotorcraft in 1909, however, he chose to concentrate on aeroplanes until the end of the 1920s.

In 1929 he announced a set of patents that addressed the flight stabilization of rotorcraft, and, in 1931, Breguet created the Syndicat d'Etudes de Gyroplane.

Answer: (d)

Answer: (b)

Christian Neethling Barnard was a South African cardiac surgeon who performed the world’s first successful human-to-human heart transplant.

Following the first successful kidney transplant in 1953, in the United States, Barnard performed the first kidney transplant in South Africa in October 1967. Barnard experimented for several years with animal heart transplants.

More than 50 dogs received transplanted hearts. He performed the world’s first human heart transplant operation on 3 December 1967, in an operation assisted by his brother, Marius Barnard; the operation lasted nine hours and used a team of thirty people.

Answer: (b)

Seismography is the scientific measuring and recording of the shock and vibrations of earthquakes. The study of these records is known as seismology.

The instrument for automatically detecting and recording the intensity, direction, and duration of a movement of the ground, especially of an earthquake, is known as a seismograph.