GATE Practice Question and Answer
8Q: Statement: There has been a significant drop in the water level of all the lakes supplying water to the city.Courses of action:I. The water supply authority should impose a partial cut in supply to tackle the situation.II. The government should appeal to all the residents though mass media for minimal use of water. 2963 05b5cc736e4d2b4197774f85b
5b5cc736e4d2b4197774f85b- 1Only I followsfalse
- 2Only II followsfalse
- 3Both I & II followstrue
- 4Neither I nor II followsfalse
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Answer : 3. "Both I & II follows"
Explanation :
Answer: C) Both I & II follows Explanation: The situation can be tackled by periodic cuts in supply, and urging people to conserve water. So both the courses follow.
Q: Which elements are malleable and good conductors of electricity? 2963 05b5cc619e4d2b4197774b714
5b5cc619e4d2b4197774b714- 1tin and silvertrue
- 2iodine and silverfalse
- 3tin and xenonfalse
- 4iodine and xenonfalse
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Answer : 1. "tin and silver"
Explanation :
Answer: A) tin and silver Explanation: Tin and Silver are malleable and good conductors of electricity. The other combinations have a non metal in them which are bad conductors.
Q: Find the next number in the given number series? 96, 95, 87, 78, ? 2953 05b5cc60ae4d2b4197774b5c9
5b5cc60ae4d2b4197774b5c9- 164false
- 257false
- 329false
- 414true
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Answer : 4. "14"
Explanation :
Answer: D) 14 Explanation: The given number series is 96, 95, 87, 78, ? It follows a pattern that, 9696 - 12 = 9595 - 23 = 95 - 8 = 8787 - 32 = 87 - 9 = 7878 - 43 = 78 - 64 = 14 Hence, the next number in the given number series is 14.
Q: The amount of water (in ml) that should be added to reduce 9 ml lotion, containing 50% alcohol, to a lotion containing 30% alcohol is ? 2945 05b5cc74fe4d2b4197774fae5
5b5cc74fe4d2b4197774fae5- 16 mltrue
- 211 mlfalse
- 315 mlfalse
- 49 mlfalse
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Answer : 1. "6 ml"
Explanation :
Answer: A) 6 ml Explanation: Let us assume that the lotion has 50% alcohol and 50% water.ratio = 1:1As the total solution is 9mlalcohol = water = 4.5mlNow if we want the quantity of alcohol = 30%The quantity of water = 70%The new ratio = 3:7Let x ml of water be addedWe get,4.54.5+x = 37=> x=6Hence 6ml of water is added.
Q: Which of the following equations represents Photosynthesis? 2939 05b5cc6afe4d2b4197774d1c4
5b5cc6afe4d2b4197774d1c4- 16CO2 + 6H2O -----> C6H12O6 + 6O2true
- 2C6H12O6 + 6O2 -----> CO2 + 6H2Ofalse
- 3CO2 + H2O -----> C6H12O6 + 6O2false
- 46O2 + 6H2O -----> C6H12O6 + 6CO2false
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Answer : 1. "6CO2 + 6H2O -----> C6H12O6 + 6O2"
Explanation :
Answer: A) 6CO2 + 6H2O -----> C6H12O6 + 6O2 Explanation: Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms activities. Photosynthesis can be represented using a chemical equation. The overall balanced equation is 6CO2 + 6H2O →Sunlight C6H12O6 + 6O2Source of Carbon & Oxygen + Source of Electrons & Hydrogen + Energy that drives Photosynthesis ----> Sugar + Gas produced by splitting water. Where CO2 = carbon dioxide H2O = waterC6H12O6 = glucose O2 = oxygen.
Q: Which of the following metal is generally used for making filaments of bulb? 2938 05b5cc6b9e4d2b4197774d6f3
5b5cc6b9e4d2b4197774d6f3- 1Wtrue
- 2Agfalse
- 3Fefalse
- 4Rhfalse
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Answer : 1. "W"
Explanation :
Answer: A) W Explanation: W is the symbol for chemical element Tungsten or Wolfram. It is used in making filaments of bulbs.
Q: The simple interest on Rs. 25 for 4 months at the rate of 3 paise per rupee per month is : 2935 05b5cc6dde4d2b4197774ea23
5b5cc6dde4d2b4197774ea23- 1240 paisefalse
- 2Rs. 1.40false
- 3Rs. 2.20false
- 4Rs. 3true
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Answer : 4. "Rs. 3"
Explanation :
Answer: D) Rs. 3 Explanation: I = PTR/100I = 25 x 4 x 0.03/100I = 0.03 x 100 = 300 Ps = Rs. 3
Q: Statements : In a recent survey report, it has been stated that those who undertake physical exercise for at least half an hour a day are less prone to have any heart ailments. Conclusions : a) Moderate level of physical exercise is necessary for leading a healthy life.b) All people who do desk-bound jobs definitely suffer from heart ailments. 2933 05b5cc745e4d2b4197774fa31
5b5cc745e4d2b4197774fa31- 1Only a followstrue
- 2Both a & b followsfalse
- 3Only b followsfalse
- 4Neither a nor b followsfalse
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Answer : 1. "Only a follows"
Explanation :
Answer: A) Only a follows Explanation: The statement mentions that chances of heart ailments are greatly reduced by a regular half-hour exercise. So, a follows. However, it talks of only reducing the probability which does not mean that persons involved in sedentary jobs shall definitely suffer from heart ailments. So, b does not follow. Hence, concusion a only follows the given statement.