Tag: scientific inventions and technological developments

Questions Related to scientific inventions and technological developments

Henry Cort introduced the ______ process for the purification of pig iron.

social studies north america voyages and discoveries scientific inventions and technological developments india's contemporary economic condition

  1. Weaving

  2. Spinning

  3. Pudding

  4. Smelting

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Correct Option: C
Explanation:

Henry Cort was an English ironmaster. In 1784 Cort introduced the pudding process for the purification of iron, where molten pig iron was stirred in a reverberatory furnace.

Who improved the ''Derby process''?

social studies north america voyages and discoveries scientific inventions and technological developments india's contemporary economic condition

  1. John Kay

  2. James Hargreaves

  3. Cartwright

  4. John Smeaton

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Correct Option: D

Who carried out an experiment to substitute coke for charcoal?

social studies north america voyages and discoveries scientific inventions and technological developments india's contemporary economic condition

  1. Davy

  2. Abraham Derby

  3. Henry Cort

  4. Faraday

Show answer
Correct Option: B
Explanation:

This study was carried out to determine the influence of using charcoal as a supplementary fuel on the microstructure and reduction properties of sinter. 


The primary fuel was coke breeze with 0, 20, 30 and 40% replacement of weight input with charcoal to produce sinter. 

Experimental results indicate that when the replacement percentage of charcoal to coke breeze increased from 0 to 40%, the porosity and FeO content of sinter also rose. 

These changes result in an enhancement from 79.8 to 84.3% for the reducibility index due to the increased reducing surface area. In addition, the reduction degradation of sinter also improves since degradation during crystalline transformation is restricted. 

Therefore, replacing coke breeze with charcoal is able to improve the reducing properties of sinter, which is beneficial to small and large blast furnace operation.

Who captured Constantinople?

social studies north america voyages and discoveries scientific inventions and technological developments india's contemporary economic condition

  1. Ottoman Turks

  2. French

  3. British

  4. Dutch

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Correct Option: A
Explanation:

 Constantinople was capital of the Eastern Roman Empire which was conquered by the Ottoman Army, under the command Ottoman Sultan Mehmed II on 29th May 1453. 

Which tool replaced the hoe?

social studies north america voyages and discoveries scientific inventions and technological developments india's contemporary economic condition

  1. Steel plough

  2. Harrow

  3. Horse drawn cultivator

  4. Mechanical drill

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Correct Option: C

Which Island was occupied by the Portuguese in the 15th century?

social studies north america voyages and discoveries scientific inventions and technological developments india's contemporary economic condition

  1. Barbados Island

  2. Hormuz

  3. Canary Islands

  4. Maluku

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Correct Option: C
Explanation:

Before 15th century, the Canary Islands were occupied by the Spain. The Portuguese registered their presence in 15th century when in 1341 the king of Portugal sent a military expedition to the islands. By the end of the 15th century the Canary Islands already contained a considerable Portuguese population.

Which plant added fertility to the soil?

social studies north america voyages and discoveries scientific inventions and technological developments india's contemporary economic condition

  1. Clover

  2. Clove

  3. Basil

  4. Cotton

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Correct Option: A
Explanation:

Soil regains its fertility with the help of leguminous plants due to the presence of abundant nitrogen and of these options, it is clover which has a high nitrogen content.

When did Vasco da Gama discover India?

social studies north america voyages and discoveries scientific inventions and technological developments india's contemporary economic condition

  1. 1494

  2. 1472

  3. 1498

  4. 1453

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Correct Option: C
Explanation:
The discovery of the sea route to India is the description sometimes used in Europe and among the Portuguese for the first recorded trip made directly from Europe to India via the Atlantic Ocean. It was undertaken under the command of Portuguese explorer Vasco da Gama during the reign of King Manuel I in 1497 -1499. Considered by Europe to be one of the most remarkable voyages of the Age of Discovery, it consolidated the Portuguese maritime presence in Indian Ocean and that country's dominance of global trade routes.

Which tool was invented for seeding?

social studies north america voyages and discoveries scientific inventions and technological developments india's contemporary economic condition

  1. Mechanical drill

  2. Steel plough

  3. Harrow

  4. Hoe

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Correct Option: A
Explanation:

The mechanical drill is used for the seeding it was invented in  1701 by an English agricultural pioneerJethro Tull. 

Which islands were discovered by Henry's sailors?
This question has multiple answers.

social studies north america voyages and discoveries scientific inventions and technological developments india's contemporary economic condition

  1. Madeira

  2. Spice

  3. Azores

  4. Andaman

Show answer
Correct Option: A,C
Explanation:

Prince Henry is considered to be the driving force behind the maritime exploration carried out by the Portuguese. His sailors discovered the Madeira and Azores Islands of Atlantic Ocean in 1420 and 1427 respectively. The Portuguese cultivated wheat and sugarcane which provided enormous wealth.