GATE Practice Question and Answer

Q: Which gymnospermic plant cures rheumatism? 3285 0

  • 1
    Ephedra
    Correct
    Wrong
  • 2
    Pinus
    Correct
    Wrong
  • 3
    Araucaria
    Correct
    Wrong
  • 4
    Gnetum
    Correct
    Wrong
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Answer : 4. "Gnetum"
Explanation :

Answer: D) Gnetum Explanation: Oil from Gnetum spp a gymnosperm belonging to the family Gnetaceae is used to relieve the effects of rheumatism The lianas and shrubs of Gnetum are found in the rain forests of the western ghats.

Q: Three taps P, Q and R can fill a tank in 12 hrs, 15 hrs and 20 hrs respectively. If P is open all the time and Q and R are open for one hour each alternately, starting with Q, then the tank will be full in how many hours ? 3280 0

  • 1
    9 hrs
    Correct
    Wrong
  • 2
    7 hrs
    Correct
    Wrong
  • 3
    13 hrs
    Correct
    Wrong
  • 4
    11 hrs
    Correct
    Wrong
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Answer : 2. "7 hrs"
Explanation :

Answer: B) 7 hrs Explanation: Given, P can fill in 12 hrs Q can fill in 15 hrs R can fill in 20 hrs => Volume of tank = LCM of 12, 15, 20 = 60 lit => P alone can fill the tank in 60/12 = 5 hrs => Q alone can fill the tank in 60/15 = 4 hrs => R alone can fill the tank in 60/20 = 3 hrs Tank can be filled in the way that (P+Q) + (P+R) + (P+Q) + (P+R) + .... => Tank filled in 2 hrs = (5+4) + (5+3) = 9 + 8 = 17 lit => In 6 hrs = 17 x 6/2 = 51 lit => In 7th hr = 51 + (5+4) = 51 + 9 = 60 lit => So, total tank will be filled in 7 hrs.

Q: Play is to actor as concert is to 3273 0

  • 1
    Musician
    Correct
    Wrong
  • 2
    percussion
    Correct
    Wrong
  • 3
    symphony
    Correct
    Wrong
  • 4
    piano
    Correct
    Wrong
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Answer : 1. "Musician"
Explanation :

Answer: A) Musician Explanation: An actor performs in a play. A musician performs at a concert. Choices b, c, and d are incorrect because none is people who perform.   Hence, Play is to actor as concert is to Musician.

Q: Look at the series : 3, 7, 24, 11, __, 19, 19,... What number should fill the blank ? 3273 0

  • 1
    15
    Correct
    Wrong
  • 2
    13
    Correct
    Wrong
  • 3
    21
    Correct
    Wrong
  • 4
    16
    Correct
    Wrong
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Answer : 1. "15"
Explanation :

Answer: A) 15 Explanation: Two series alternate here, with every third number following a different pattern.In the main series, 4 is added to each number to arrive the next.In alternate series, 5 is subtracted from each number t arrive the next number.Here in the main series 3 + 4 = 77 + 4 = 1111 + 4 = 1515 + 4 = 19 In alternate series 24 - 5 = 1919 - 5 = 14...

Q: Running 3/4th of his usual rate, a man is 15min late. Find his usual time in hours  ? 3260 0

  • 1
    2/3 hrs
    Correct
    Wrong
  • 2
    3/4 hrs
    Correct
    Wrong
  • 3
    1/3 hrs
    Correct
    Wrong
  • 4
    1/4 hrs
    Correct
    Wrong
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Answer : 2. "3/4 hrs"
Explanation :

Answer: B) 3/4 hrs Explanation: Walking at 3/4th of usual rate implies that time taken would be 4/3th of the usual time. In other words, the time taken is 1/3rd more than his usual time   so 1/3rd of the usual time = 15minor usual time = 3 x 15 = 45min = 45/60 hrs = 3/4 hrs.

Q: If a2+b2 = c2 , then 1logc+ab + 1logc-ab = ? 3258 1

  • 1
    1
    Correct
    Wrong
  • 2
    2
    Correct
    Wrong
  • 3
    4
    Correct
    Wrong
  • 4
    8
    Correct
    Wrong
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Answer : 2. "2"
Explanation :

Answer: B) 2 Explanation: Given a2 + b2 = c2   Now  1logc+ab  + 1logc-ab    = logbc+a + logbc-a   = logbc2-a2 = 2logbb = 2

Q: In what time will Rs. 3300 becomes Rs. 3399 at 6% per annum interest compounded half-yearly ? 3251 0

  • 1
    Quarter months
    Correct
    Wrong
  • 2
    Half year
    Correct
    Wrong
  • 3
    2 years
    Correct
    Wrong
  • 4
    1 year
    Correct
    Wrong
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Answer : 2. "Half year"
Explanation :

Answer: B) Half year Explanation: 3300 ----- 3% ↑ (1st time interval, 99) → 3399. Here, time interval is given as half-yearly i.e. 6 months.

Q: Where is RAM located? 3247 0

  • 1
    Mother Board
    Correct
    Wrong
  • 2
    Expansion Board
    Correct
    Wrong
  • 3
    External Drive
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 1. "Mother Board"
Explanation :

Answer: A) Mother Board Explanation: RAM is located in The central processing unit (CPU), also called a processor, is located inside the computer case on the motherboard. It is sometimes called the brain of the computer, and its job is to carry out commands.

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