Discoveries And Inventions (Railway)

Total Questions: 11

1. Who invented Penicillin? [RRB NTPC CBT Stage-I Exam, 28.03.2016 Shift-I]

(A) Louis Pasteur

(B) Alexander Fleming

(D) Scott Davis

(1) D
(2) C
(3) A
(4) B

Correct Answer: (4) B

Solution:Penicillin is a group of antibiotics that was discovered in 1928 by Scottish scientist Alexander Fleming. It was derived from the mould Penicillium notatum. For this discovery, Fleming shared the Nobel Prize in Physiology or Medicine in 1945 with Howard Florey and Ernst Boris Chain.

2. The first gasoline car engine was developed by: [RRB NTPC CBT Stage-1 Exam, 11.04.2016 Shift-II]

(A) Henry Ford

(B) Carl Benz

(D) Horace Elgin Dodge

(1) D
(2) B
(3) A
(4) C

Correct Answer: (2) B

Solution:Karl Benz, a German mechanical engineer, designed and built the first practical motorcar powered by an internal-combustion engine in 1885. The original car, his three-wheeled Motorwagen. first ran in 1885. His company produced its first four-wheeled car in 1893 and the first of its series of racing cars in 1899.

3. Who first discovered that every eighth element had properties similar to that of the first? [RRB ALP & Technician Exam, 21.08.2018 Shift-III]

(1) Newlands
(2) Moseley
(3) Dobereiner
(4) Mendeleev

Correct Answer: (1) Newlands

Solution:In the year 1866, an English scientist, John Newlands arranged the elements in the order of increasing atomic masses. He started with hydrogen which has the lowest atomic mass and finally ended at thorium which was the element known to have highest atomic mass at that time. He noticed that every eighth element exhibits similar properties as compared to the first element. He called this law as the 'Law of Octaves' better known as 'Newland's Law of Octaves'.

4. Who invented the nucleus of the cell? [RRB RPF Constable Exam, 17.01.2019 Shift-III]

(1) Robert Hook
(2) Alexander Fleming
(3) Anthony Van Leeuwenhoek
(4) Robert Brown

Correct Answer: (4) Robert Brown

Solution:In 1831, Robert Brown discovered the nucleus in the cell.

• The nucleus in eukaryotic cells is a protoplasmic body covered by a double membrane that contains the hereditary details.

5. The scientific study of grass is called_________. [RRB RPF Constable Exam, 25.01.2019 Shift-I]

(1) Theology
(2) Agrostology
(3) Pomology
(4) Osteology

Correct Answer: (2) Agrostology

Solution:Agrostology is defined as the study of grasses.

• The word comes from Greek root, 'agrostis'.

6. Who among the following scientists discovered radium, a radioactive element? [RRB-CBT for ALP & Technicians Exam, 22.01.2019 Shift-I]

(1) Amedeo Avogadro
(2) Leonhard Euler
(3) Marie Curie
(4) Louis Pastuer

Correct Answer: (3) Marie Curie

Solution:Henri Becquerel (1852-1908) observed that there are certain elements which emits radiation on their own and named this phenomenon as radioactivity and the element is known as radioactive elements. This field was developed by Marie Curie, Piere Curie, Rutherford and Fredrick Soddy.

The SI unit of Radioactivity is Becquerel (Bq) and another unit of it is Curie (Ci).

7. ____________was discovered by the Scottish physician Daniel Rutherford in 1772. [RRB-CBT for ALP & Technicians Exam, 22.01.2019 Shift-I]

(1) Chlorine
(2) Helium
(3) Hydrogen
(4) Nitrogen

Correct Answer: (4) Nitrogen

Solution:Nitrogen was discovered by the Scottish physician Daniel Rutherford.

• Rutherford discovered nitrogen by the isolation of the particle in 1772.

• Nitrogen is the chemical element with the symbol N and atomic number 7.

• The name nitrogen was suggested by French chemist Jean-Antoine-Claude Chaptal in 1790.

• Nitrogen is the fifth most abundant element in the Universe. It constitutes 78% of Earth's air.

8. Who invented blue jeans? [RRB-CBT for ALP & Technicians Exam, 22.01.2019 Shift-I]

(1) Levi Strauss
(2) Gianni Versace
(3) Todd oldham
(4) Calvin Klein

Correct Answer: (1) Levi Strauss

Solution:Levi Strauss invented blue jeans. He was an entrepreneur who invented and marketed blue jeans.

9. Henry Cavendish discovered __________ in 1766. [RRB-CBT for ALP & Technicians Exam, 22.01.2019 Shift-I]

(1) hydrogen
(2) helium
(3) chlorine
(4) oxygen

Correct Answer: (1) hydrogen

Solution:Henry Cavendish discovered hydrogen in 1766.

10. Which Indian born Scottish inventor poineered the development of the cash machine also called Automated Teller Machine (ATM)? [RRB NTPC CBT-1 Exam, 27.01.2021 (Shift-II)]

(1) James Goodfellow
(2) Luther Wetzel
(3) John Shepherd-Barron
(4) Donald Harrier

Correct Answer: (3) John Shepherd-Barron

Solution:John Adrian Shepherd-Barron led the team that installed the first cash machine, sometimes referred to as the Automated Teller Machine or ATM.

• These machines did not use plastic cards, instead it used cheques that were impregnated with carbon 14, a mildly radioactive substance.

• The machine detected it, then matched the cheque Against a PIN (Personal Identification Number).

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