2019 [Current Affairs]: Questions 620 - 622 of 730

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Question number: 620

» 2019 » April

» National News » Scientific and Technological Developments

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MCQ▾

Question

Consider the following statements about the Superconductivity:

i) It is a phenomenon of exactly zero electrical resistance.

ii) This phenomenon occurs at extremely high pressure.

iii) Recently superconductivity has been observed at temperatures of about minus 89 degrees Celsius.

iv) Aluminium, Niobium are some of the examples of Superconductors.

Which of the above statements are correct?

Choices

Choice (4)Response

a.

ii, iii and iv

b.

i, ii and iv

c.

ii and iv

d.

None of the above

Question number: 621

» 2019 » December

» National News » Persons in News

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MCQ▾

Question

Who joined recently as the Chief Economist of International Monetary Fund?

Choices

Choice (4)Response

a.

Gita Gopinath

b.

Christine Legard

c.

Maurice Obstfeld

d.

Raghuram Rajan

Question number: 622

» 2019 » June

» National News » Environment

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MCQ▾

Question

Consider the following statements:

1. Biochemical oxygen demand (BOD is the amount of dissolved oxygen needed by aerobic biological organisms for the biochemical degradation of organic materials in water.

2. Dissolved oxygen (DO) is the amount of oxygen that is present in the water.

3. Higher the BOD higher will be the DO.

4. Higher the rate of pollution, higher will be the BOD.

Which of the statements given above is/are correct?

Choices

Choice (4)Response

a.

3, and 4

b.

1,2, 3, and 4

c.

1,2 and 4

d.

2, and 3

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