Practice Question and Answer

Q: Which best describes how air moves during convection? 4244 0

  • 1
    cool air falls down
    Correct
    Wrong
  • 2
    warm air falls down
    Correct
    Wrong
  • 3
    cool air is replaced by warm air
    Correct
    Wrong
  • 4
    air always falls down
    Correct
    Wrong
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Answer : 1. "cool air falls down"
Explanation :

Answer: A) cool air falls down Explanation: During convection, cool and dense air falls through the warmer and less dense air. The warm air having less mass is being displaced by the cooler which is much heavy. Convection always involves the air rising through the atmosphere.

Q: Two trains of equal length, running with the speeds of 60 and 40 kmph, take 50 seconds to cross each other while they are running in the same direction. What time will they take to cross each other if they are running in opposite directions  ? 4244 0

  • 1
    10 sec
    Correct
    Wrong
  • 2
    11 sec
    Correct
    Wrong
  • 3
    12 sec
    Correct
    Wrong
  • 4
    8 sec
    Correct
    Wrong
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Answer : 1. "10 sec"
Explanation :

Answer: A) 10 sec Explanation: Relative Speed = 60 -40 = 20 x 5/18 = 100/18 Time = 50 Distance = 50 x 100/18 = 2500/9 Relative Speed = 60 + 40 = 100 x 5/18 Time = 2500/9 x 18/500 = 10 sec.

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Answer : 1. "national"

Q:

Second battle of Panipat was fought between?

4238 0

  • 1
    Babur and Lodi
    Correct
    Wrong
  • 2
    Akbar and Hemu
    Correct
    Wrong
  • 3
    Mughal and British
    Correct
    Wrong
  • 4
    Akbar and Lodi
    Correct
    Wrong
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Answer : 2. "Akbar and Hemu"

Q:

What is the sum of six hundred nine and four thousand twenty-eight?

4237 0

  • 1
    4870
    Correct
    Wrong
  • 2
    3820
    Correct
    Wrong
  • 3
    3087
    Correct
    Wrong
  • 4
    4637
    Correct
    Wrong
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Answer : 4. "4637"

Q: A company requires 12,100 strength. Present employees are 400 ladies and 6400 gents. To reach the target how many ladies required to maintain the same ratio ? 4235 0

  • 1
    400
    Correct
    Wrong
  • 2
    600
    Correct
    Wrong
  • 3
    900
    Correct
    Wrong
  • 4
    700
    Correct
    Wrong
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Answer : 3. "900"
Explanation :

Answer: C) 900 Explanation: 6,400 gents, 2400 ladies in that company.So total 8,800employees.for 8,800 employees, we want 2400 ladies.for 12,100employees we want how many ladies ?=> (12,100/8,800) x 2400 = 3300.So we want 3300 - 2400 = 900 more ladies.

Q:

Which option will replace the question mark in the following picture series?

4233 0

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

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