GATE Questions

Q:

Lasya invested certain amount for two rates of simple interests at 5% p.a. and 4% p.a. What is the ratio of Lasya's investments if the interests from those investments are equal ?

A) 4 : 5 B) 5 : 4
C) 7 : 6 D) 6 : 7
 
Answer & Explanation Answer: A) 4 : 5

Explanation:

Let x be the investment of Lasya in 5% and y be in 4%

x(5)(n)/100 = y(4)(n)/100

=> x/y = 4/5

x : y = 4 : 5

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Filed Under: Simple Interest
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3 3951
Q:

In how many different ways can the letters of the word 'POVERTY' be arranged ?

A) 2520 B) 5040
C) 1260 D) None
 
Answer & Explanation Answer: B) 5040

Explanation:

The 7 letters word 'POVERTY' be arranged in 7P7 ways = 7! = 5040 ways.

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Filed Under: Permutations and Combinations
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13 3950
Q:

A doppler effect occurs when a source of sound moves

A) away from you B) towards you
C) Both A & B D) None of the above
 
Answer & Explanation Answer: C) Both A & B

Explanation:

The Doppler effect or Doppler shift is the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source. 

a_doppler_effect_occurs_when_a_source_of_sound_moves1560770484.jpg image

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Filed Under: Physics
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5 3948
Q:

Which statement about weak bonds is correct?

A) Covalent bonds are weak bonds B) They are hard to break
C) Weak bonds are transient and easily reversible. D) All of the above
 
Answer & Explanation Answer: C) Weak bonds are transient and easily reversible.

Explanation:

In chemistry, Weak bonds are those forces of attraction that, do not take a large amount of energy to break.

 

For example, hydrogen bonds are broken by energies in the order of 4 - 5 kcal/mol.

Ionic bonds, hydrogen bonds and van der Waals interactions are considered weak bonds.

 

Weak bonds are transient and easily reversible.

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Filed Under: Chemistry
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0 3945
Q:

Which of the following is not an Input device?

A) Joystick B) Headphones
C) Mouse D) Scanner
 
Answer & Explanation Answer: B) Headphones

Explanation:

Here Joystick, Mouse and Scanner are Input devices through which data is given to the computers. But Headphones are output devices through which sound comes as an output from the computer or any devices.

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7 3941
Q:

12 men complete a work in 14 days. 5 days after they had started working, 3 men join them. How many more days will all of them take to complete the remaining work?

A) 5 B) 4
C) 3 D) 2
 
Answer & Explanation Answer: C) 3

Explanation:

Let p be the required number of days.

From the given data,

12 x 14 = 12 x 5 + (12+3) x p 

12 x 14 = 12[5 + 3p]

14 = 5 + 3p

3p = 9

p = 3 days.

 

Hence, more 3 days all of them take to complete the remaining work.

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Filed Under: Time and Work
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2 3936
Q:

Nuclear Fission is caused by the impact of

A) Electron B) Neutron
C) Proton D) Deutron
 
Answer & Explanation Answer: B) Neutron

Explanation:

In nuclear physics, nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei). The fission process often produces free neutrons and releases a very large amount of energy.

 

Thus, The Nuclear Fission is caused by the impact of Neutrons.

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5 3928
Q:

Instrument used to measure oxygen?

A) Aminometer B) Respirometer
C) Thaleometer D) Galiometer
 
Answer & Explanation Answer: B) Respirometer

Explanation:

A respirometer is a device used to measure the rate of respiration of a living organism by measuring its rate of exchange of oxygen and/or carbon dioxide.

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Filed Under: General Awareness
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5 3924