GATE Questions

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:

8(6+5) - 10 =?

A) 76 B) 78
C) 80 D) 82
 
Answer & Explanation Answer: B) 78

Explanation:

8(6+5) - 10 = ?

? = 8(11) - 10

? = 88 - 10

? = 78.

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Filed Under: Analytical Reasoning
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Q:

A man pointing to a lady says, “Her brother is the father of my only son's sister.” How is that lady related to the man ?

A) Daughter-in-law B) Sister
C) Niece D) Daughter
 
Answer & Explanation Answer: B) Sister

Explanation:

My only son's sister is my daughter
father of my daughter is me only
her brother means she is my 'sister'.

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Filed Under: Blood Relations
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4 3651
Q:

Antonym of 'Humble'?

A) Bold B) Down-to-Earth
C) Lowly D) Modest
 
Answer & Explanation Answer: A) Bold

Explanation:

Humble means not having or showing any feelings of superiority, self-assertiveness, or showiness.

Humble means in a modest, lowly and down-to-earth manner. Not in a aggressive, bold, self confident manner.

 

Hence, in the given options Bold is an antonym of Humble.

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Filed Under: English
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1 3649
Q:

Friction can be reduced by changing from

A) Static to Dynamic B) Rolling to Sliding
C) Dynamic to Static D) Sliding to Rolling
 
Answer & Explanation Answer: D) Sliding to Rolling

Explanation:

Any object rolls when there is no friction. So, Sliding to Rolling is correct.

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Filed Under: Physics
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Q:

What is another name for energy of motion?

A) Motional energy B) Potential energy
C) Kinetic energy D) Rotational energy
 
Answer & Explanation Answer: C) Kinetic energy

Explanation:

Every object has two typea of energies. They are ::

Potential energy

Kinetic energy

 

If the object is in motion, then it has Kinetic energy (KE). Potential energy (PE) is energy that is "stored" because of the position and/or arrangement of the object.

 

Hence, another name for energy of motion is called Kinetic energy.

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Filed Under: Physics
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0 3647
Q:

Which of the following number is divisible by 24?

A) 37804 B) 2015736
C) 36718 D) 53810
 
Answer & Explanation Answer: B) 2015736

Explanation:

Divisibility rule for 24 is the number should be divisible by 3 and 8. As we know that 24 = 3 x 8

Now, 

Divisibility rule for 3 :

If the sum of the digits of a number is divisible by 3, then the number is divisible by 3.

 

Divisibility rule for 8 :

The last three digits of a number should be divisible by 8.

Hence, check for the given options,

A) 37804 => 804 is not divible by 8.

C) 36718 => 718 is not divible by 8.

D) 53810 => 810 is not divible by 8.

B) 2015736 => 736 is divisble by 8 and sum 2 + 0 + 1 + 5 + 7 + 3 + 6 = 24 which is divisible by 3.

 

Hence, 2015736 is divisible by 24.

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Filed Under: Arithmetical Reasoning
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Q:

Which river crosses the equator twice?

A) Congo B) Amazon
C) Nile D) None of the above
 
Answer & Explanation Answer: A) Congo

Explanation:

River Congo is the only river which crosses the equator twice.

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Filed Under: World Geography
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4 3638