GATE Practice Question and Answer

Q: Last year vivek saved 10% of his annual earnings, this year he earned 5% more than last year and he saved 12% of his annual earnings. The amount saved this year was what percentage of the amount saved last year ? 2287 0

  • 1
    87%
    Correct
    Wrong
  • 2
    98%
    Correct
    Wrong
  • 3
    138%
    Correct
    Wrong
  • 4
    126%
    Correct
    Wrong
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Answer : 4. "126%"
Explanation :

Answer: D) 126% Explanation: Suppose total earnings = Rs. 1000010% saving = 10000 x (10/100) = Rs. 1000This year 5% more income than prev year = Rs. 1050012% saving = 10500 x (12/100) = Rs. 1260Percentage of amount saved = (1260/1000) x 100 = 126%

Q: Instruments for measuring Solar Radiation? 2287 0

  • 1
    Ammeter
    Correct
    Wrong
  • 2
    Pyranometer
    Correct
    Wrong
  • 3
    Dynamometer
    Correct
    Wrong
  • 4
    Anemometer
    Correct
    Wrong
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Answer : 2. "Pyranometer"
Explanation :

Answer: B) Pyranometer Explanation: Solar radiation instruments may be produced to measure different types of solar energy. When sunlight encounters the Earth's atmosphere, some of it is absorbed or scattered by water vapor, aerosols, clouds, and other air molecules. The radiation which penetrates to the Earth's surface is termed direct solar radiation.   A thermopile pyranometer is a type of actinometer used for measuring solar radiation on a planar surface and it is designed to measure the solar radiation flux density (W/m2) from the hemisphere above within a wavelength range 0.3 μm to 3 μm.

Q: Population of a colony of mosquitoes is increasing by 20% per day. If the population on Monday was 3000, on which day of that week the population would be 5184 ? 2285 0

  • 1
    Thursday
    Correct
    Wrong
  • 2
    Friday
    Correct
    Wrong
  • 3
    Tuesday
    Correct
    Wrong
  • 4
    Monday
    Correct
    Wrong
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Answer : 1. "Thursday"
Explanation :

Answer: A) Thursday Explanation: Given monday population = 3000Per day 20% increase in population. Tuesday population = 3000 + 3000x20/100 = 3000 + 600 = 3600 Wednesday population =3600 + 3600x20/100 = 3600 + 720 = 4320 Thursday population = 4320 + 4320x20/100 = 4320 + 864 = 5184 So that day is Thursday.

Q: If the given two numbers are respectively 7% and 28% of a third number, then what percentage is the first of the second ? 2283 0

  • 1
    24%
    Correct
    Wrong
  • 2
    29%
    Correct
    Wrong
  • 3
    34%
    Correct
    Wrong
  • 4
    25%
    Correct
    Wrong
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Answer : 4. "25%"
Explanation :

Answer: D) 25% Explanation: Here, k = 7 and l = 28Therefore, first number = klx100 % of second number = 7/28 x 100% of second number = 25% of second number.

Q: Proteins differ from one another because 2278 0

  • 1
    The peptide bonds linking amino acids differ from protein to protein
    Correct
    Wrong
  • 2
    Each protein contains its own unique sequence of sugar molecules
    Correct
    Wrong
  • 3
    The number of nucleotides found in each protein varies from molecule to molecule
    Correct
    Wrong
  • 4
    The sequence of amino acids in the polypeptide chain differs from protein to protein
    Correct
    Wrong
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Answer : 4. "The sequence of amino acids in the polypeptide chain differs from protein to protein"
Explanation :

Answer: D) The sequence of amino acids in the polypeptide chain differs from protein to protein Explanation:

Q: I have an eye but cannot see? 2277 0

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Answer :
Explanation :

Its a Needle. Needle has an eye but can't see.

Q: Car is to garage as aeroplane is to 2277 0

  • 1
    Hangar
    Correct
    Wrong
  • 2
    Port
    Correct
    Wrong
  • 3
    Harbour
    Correct
    Wrong
  • 4
    Depot
    Correct
    Wrong
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Answer : 1. "Hangar"
Explanation :

Answer: A) Hangar Explanation: We park car temporarily in garrage, similarly, aeroplane is temporarily parked in hangar.

Q: A sum of money becomes 7/6 of itself in 3 years at a certain rate of simple interest. The rate per annum is ? 2276 0

  • 1
    45/7 %
    Correct
    Wrong
  • 2
    50/9 %
    Correct
    Wrong
  • 3
    51/7 %
    Correct
    Wrong
  • 4
    47/ 9 %
    Correct
    Wrong
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Answer : 2. "50/9 %"
Explanation :

Answer: B) 50/9 % Explanation: Let sum = S. Then, amount = 7S/6 S.I. = 7S/6 - S = S/6; Time = 3 years. Rate = (100 x S) / (S x 6 x 3) = 5 5/9 = 50/9 %.

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