Exams


Q:

Sources of geothermal power are

A) water B) earth's heat
C) Both A & B D) None of the above
 
Answer & Explanation Answer: C) Both A & B

Explanation:

Geothermal power plants are used in order to generate electricity by the use of geothermal energy (the Earth's internal thermal energy). They essentially work the same as a coal or nuclear power plant, the main difference being the heat source.

geothermal_power1531899280.png image

Geothermal power plants use hydrothermal resources that have both water (hydro) and heat (thermal). Geothermal power plants require high-temperature (300°F to 700°F) hydrothermal resources that come from either dry steam wells or from hot water wells.

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Filed Under: Physics
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Q:

When is 'World Autism Awareness Day' celebrated ?

A) 1 April B) 2 April
C) 3 April D) 4 April
 
Answer & Explanation Answer: B) 2 April

Explanation:

The Qutub Minar in New Delhi was lit up in blue as part of World Autism Day on 2 April.

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Filed Under: Important Days and Years
Exam Prep: Bank Exams

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Q:

Calcium absorption is facilitated by the presence of

A) Vitamin D B) Vitamin C
C) Vitamin A D) Vitamin K
 
Answer & Explanation Answer: A) Vitamin D

Explanation:

The presence of vitamin D in the body enhances the absorption of calcium by the intestine.

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Q:

Webpages are written using

A) Win Zip B) HTML
C) A fifth generation language D) Peripherals
 
Answer & Explanation Answer: B) HTML

Explanation:

Webpages are written using HTML, (Hyper Text Marup Language). It is used for creating web applications that can be accessed over internet which contain text, graphics and hyperlinks.

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Q:

A test to determine processor speed is?

A) a gesture B) flat panel
C) a benchmark D) None of the above
 
Answer & Explanation Answer: C) a benchmark

Explanation:

The total number of instructions a computer executes per second is called as its processors speed. 

 

Maximum the processor's speed minimum the time for execution.

 

A test to determine processor speed is a benchmark.

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Q:

Which formula represents a molecular compound?

A) Ar B) NaI
C) N2O4 D) All of the above
 
Answer & Explanation Answer: C) N2O4

Explanation:

Molecular compounds are those with covalent bonds between the elements and those elements are typically non metals.

 

Here in the given options, Ar is an element. NaI has an ionic bond. Hence, N2O4 has a covalent bond between the two non metals and is a molecular compound.

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Q:

Conductivity in a metal results from the metal atoms having

A) highly mobile electrons in the valence shell B) high electronegativity
C) high ionization energy D) highly mobile protons in the nucleus
 
Answer & Explanation Answer: A) highly mobile electrons in the valence shell

Explanation:

The outer most electrons that are free to move are called valency electrons that are responsible for the conductivity in the metal atoms.

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Filed Under: Chemistry
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Q:

What does 'M' stand for in chemistry?

Answer

'M' is used as a unit of molarity and stands for mole per litre i.e, number of moles of solute per liter of solution.

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