IIT JEE Practice Question and Answer

Q: Which international Airport Ltd has bagged the National Award for 'Excellence' in Energy Management ? 989 0

  • 1
    New Delhi
    Correct
    Wrong
  • 2
    Lucknow
    Correct
    Wrong
  • 3
    Hyderabad
    Correct
    Wrong
  • 4
    Mumbai
    Correct
    Wrong
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Answer : 3. "Hyderabad"
Explanation :

Answer: C) Hyderabad Explanation:

Q: Nipah virus outbreak in Bangladesh in the year 989 0

  • 1
    2001
    Correct
    Wrong
  • 2
    2006
    Correct
    Wrong
  • 3
    2012
    Correct
    Wrong
  • 4
    2015
    Correct
    Wrong
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Answer : 1. "2001"
Explanation :

Answer: A) 2001 Explanation: The first identification of Nipah virus as a cause of an outbreak of encephalitis was reported in 2001 in Meherpur district of Bangladesh. Since, then Outbreaks of the deadly Nipah virus has been recorded almost every year in selected districts of Bangladesh.   Drinking raw date palm sap and contact with a case were identified as the major risk factors for acquiring the disease.

Q: Cold foods should be kept at a temperature of 988 0

  • 1
    < 5 deg Celcius
    Correct
    Wrong
  • 2
    > 18 deg Celcius
    Correct
    Wrong
  • 3
    > 41 deg Celcius
    Correct
    Wrong
  • 4
    < -18 deg Celcius
    Correct
    Wrong
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Answer : 1. "< 5 deg Celcius"
Explanation :

Answer: A) < 5 deg Celcius Explanation: To reduce the risk of bacterial contamination, many foods must be stored in the refrigerator and thus kept below 5 degrees Celsius. These foods are often classified as ‘high-risk foods’ and include – meat, poultry, dairy, seafood, eggs, smallgoods and cooked rice and pasta. This also refers to ready-to-eat foods that have high-risk foods as ingredients and include – casseroles, quiche, pasta salad, pizza, sandwiches and many cakes.   By keeping these high-risk foods under 5 degrees Celsius it stops them from entering the ‘danger-zone’ – temperatures between 5 degrees Celsius and 60 degrees Celsius. The danger-zone is the temperature zone which provides bacteria with the perfect environment to rapidly grow and multiply to numbers that cause food poisoning.

Q: A train travelling at 48 kmph crosses another train, having half its length and travelling in opposite direction at 42 kmph, in 12 sec. It also covers a bridge in 45 sec. Find the length of the bridge ? 987 0

  • 1
    250 mts
    Correct
    Wrong
  • 2
    400 mts
    Correct
    Wrong
  • 3
    320 mts
    Correct
    Wrong
  • 4
    390 mts
    Correct
    Wrong
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Answer : 2. "400 mts"
Explanation :

Answer: B) 400 mts Explanation: Let the length of the 1st train = L mts Speed of 1st train = 48 kmph Now the length of the 2nd train = L/2 mts Speed of 2nd train = 42 kmph Let the length of the bridge = D mts Distance = L + L/2 = 3L/2 Relative speed = 48 + 42 = 90 kmph = 90 x 5/18 = 25 m/s(opposite) Time = 12 sec => 3L/2x25 = 12 => L = 200 mts Now it covers the bridge in 45 sec => distance = D + 200 Time = 45 sec Speed = 48 x5/18 = 40/3 m/s => D + 200/(40/3) = 45 => D = 600 - 200 = 400 mts Hence, the length of the bridge = 400 mts.

Q: Who is in the judicial branch? 986 0

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Answer :
Explanation :

Judicial branch is one among the three branches of the government.  Supreme court, the magistrate (local) and municipal (city) courts are there in the judicial branch. The Judicial branch interprets the laws.

Q: How long would it take to travel 4 light years? 985 0

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Answer :
Explanation :

There are approximately 6 trillion miles in a light-year, so the distance we need to go is 6 trillion miles / light-year times. 4 light-years is equal to 24 trillion miles. So, this whole would take 1.2 billion hours. There are 24 hours a day and 365.25 days per year, so this time in years is 137 thousand years.

Q: What is the smallest unit that can evolve? 984 0

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Answer :
Explanation :

The population is the smallest unit of living organisms that can undergo evolution.

Q: I have keys but no locks, I have space but no room. You can enter but can't go outside. What am I? 984 0

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Answer :
Explanation :

I am Keyboard. A Keyboard has keys of letters, space button and enter button.

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