GATE Practice Question and Answer
8Q: "Light years" is the unit of _____? 1583 05b5cc6bfe4d2b4197774da05
5b5cc6bfe4d2b4197774da05- 1Accelerationfalse
- 2Distancetrue
- 3Light Intensityfalse
- 4Weightfalse
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Answer : 2. "Distance"
Explanation :
Answer: B) Distance Explanation: A Light-year is a distance that light travels in the vacuum in one Julian year (365.25 days). The light-year is a unit of length used to express astronomical distances. It is about 9.5 trillion kilometers or 5.9 trillion miles.
Q: A train-A passes a stationary train B and a pole in 24 sec and 9 sec respectively. If the speed of train A is 48 kmph, what is the length of train B? 1583 05b5cc698e4d2b4197774c613
5b5cc698e4d2b4197774c613- 1200 mtstrue
- 2180 mtsfalse
- 3160 mtsfalse
- 4145 mtsfalse
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Answer : 1. "200 mts"
Explanation :
Answer: A) 200 mts Explanation: Length of train A = 48 x 9 x 5/18 = 120 mts Length of train B = 48 x 24 x 5/18 - 120 => 320 - 120 = 200 mts.
Q: Wind and solar energy are examples of 1583 05b5cc698e4d2b4197774c65c
5b5cc698e4d2b4197774c65c- 1Non renewablefalse
- 2Renewabletrue
- 3Unsustainablefalse
- 4Limitedfalse
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Answer : 2. "Renewable"
Explanation :
Answer: B) Renewable Explanation: Many types of renewable energy resources such as wind and solar energy are constantly replenished and will never run out.
Q: Which of the following is Not a Greenhouse Gas? 1580 05b5cc6ade4d2b4197774d12a
5b5cc6ade4d2b4197774d12a- 1Oxygentrue
- 2Methanefalse
- 3Nitrous Oxidefalse
- 4Carbondioxidefalse
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Answer : 1. "Oxygen"
Explanation :
Answer: A) Oxygen Explanation: A greenhouse gas is a gas in an atmosphere that absorbs and emits radiant energy within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. Carbon dioxide is a main greenhouse gas, found in car exhaust pipes.Methane and nitrous oxide is another type of greenhouse gas. Oxygen is the only clean gas out there because we need it to survive. Therefore, the only gas that is not a greenhouse gas is Oxygen.
Q: Priya can do a work in 16 days. In how many days will the work be completed by Sai, if the efficiency of Sai is 60% more than that of Priya ? 1578 05b5cc6c7e4d2b4197774deaf
5b5cc6c7e4d2b4197774deaf- 18 daysfalse
- 212 daysfalse
- 314 daysfalse
- 410 daystrue
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Answer : 4. "10 days"
Explanation :
Answer: D) 10 days Explanation: Ratio of efficiencies of Priya and Sai is Sai : Priya = 160 : 100 = 8 : 5 Given Priya completes the work in 16 days Let number of days Sai completes the work be 'd' => 5×16 = 8×d d = 10 days. Therefore, number of days Sai completes the work is 10 days.
Q: A is sister of B who is mother of C who is mother of D. E is the grand mother of D. Then how C is related to E ? 1577 05b5cc6e5e4d2b4197774ed60
5b5cc6e5e4d2b4197774ed60- 1Sisterfalse
- 2Daughterfalse
- 3Motherfalse
- 4Daughter-in-lawtrue
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Answer : 4. "Daughter-in-law"
Explanation :
Answer: D) Daughter-in-law Explanation: GM GMA ---- B ---- E | | C | | D (Grand son or daughter)
Q: 16 of 225 is = 1577 05b5cc6b4e4d2b4197774d4d4
5b5cc6b4e4d2b4197774d4d4- 17.11true
- 27.21false
- 36.87false
- 47.58false
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Answer : 1. "7.11"
Explanation :
Answer: A) 7.11 Explanation: 16 of 225 is = 16 = p × 225100p = 1600225 = 7.1111
Q: What is the gram formula mass of Li2SO4? 1576 05b5cc67be4d2b4197774c1d1
5b5cc67be4d2b4197774c1d1- 1101.2487false
- 2109.9446true
- 3111.2687false
- 4106.5871false
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Answer : 2. "109.9446"
Explanation :
Answer: B) 109.9446 Explanation: The term gram formula mass is synonymous with molecular mass. So, to get this, we must add molar mass of all the elements in this compound. Given compound is Lithium Sulphate - Li2SO4 Elemental calculation :: Li - Lithium - 6.941 - 2 - 13.88200 %S - Sulfur - 32.065 - 1 - 32.065 %O - Oxygen - 15.9994 - 4 - 63.9976 % Now, total = 12.6264 + 29.1647 + 58.2090 = 109.9446 Hence, the gram formula mass of Li2SO4 = 109.9446.