Practice Question and Answer
8Q: In a row of girls, Nithya and Suganya occupy the ninth place from the right end and tenth place from the left end, respectively. If they interchange their places, then Nithya and Suganya occupy seventeenth place from the right and eighteenth place from the left respectively. How many girls are there in the row? 62563 05bd2f9cec407ca5b8c184c86
5bd2f9cec407ca5b8c184c86- 122false
- 224false
- 326true
- 428false
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Answer : 3. "26"
Q: One horse power is equal to how many watts?
1881 0613744cc5ee3b079c605dda6
613744cc5ee3b079c605dda6- 1450 wattsfalse
- 2600 wattsfalse
- 3734 wattsfalse
- 4746 wattstrue
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Answer : 4. "746 watts"
Q: An iron needle floats on the surface of water. What is the reason for this phenomenon?
1548 0613744053ee2bf25f5130f7f
613744053ee2bf25f5130f7f- 1viscosityfalse
- 2acceleration due to gravityfalse
- 3surface tensiontrue
- 4none of thesefalse
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Answer : 3. "surface tension"
Q: A man went downstream for 28 km in a motor boat and immediately returned. It took the man twice as long to make the return trip. If the speed of the river flow were twice as high, the trip downstream and back would take 672 minutes. Find the speed of the boat in still water and the speed of the river flow. 53983 05b5cc672e4d2b4197774c0c8
5b5cc672e4d2b4197774c0c8- 112 km/hr, 3 km/hrfalse
- 29 km/hr, 3 km/hrtrue
- 38 km/hr, 2 km/hrfalse
- 49 km/hr, 6 km/hrfalse
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Answer : 2. "9 km/hr, 3 km/hr"
Explanation :
Answer: B) 9 km/hr, 3 km/hr Explanation: Let the speed of the boat = p kmph Let the speed of the river flow = q kmph From the given data, 2 x 28p + q = 28p - q => 56p - 56q -28p - 28q = 0 => 28p = 84q => p = 3q. Now, given that if 283q + 2q + 283q - 2q = 67260=> 285q + 28q = 67260=> q = 3 kmph=> x =3q = 9 kmph Hence, the speed of the boat = p kmph = 9 kmph and the speed of the river flow = q kmph = 3 kmph.
Q: Which scientist first melted two pieces of ice by rubbing them together?
1916 061374167576b113a3f9cb375
61374167576b113a3f9cb375- 1Celsiusfalse
- 2Joulefalse
- 3Davytrue
- 4none of thesefalse
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Answer : 3. "Davy"
Q: Which of the following quantities is not a vector?
1174 0613740ba3ee2bf25f512fd0b
613740ba3ee2bf25f512fd0b- 1Velocityfalse
- 2Volumetrue
- 3Displacementfalse
- 4forcefalse
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Answer : 2. "Volume"
Q: A person of good understanding knowledge and Reasoning power 47180 05b5cc6aae4d2b4197774cf42
5b5cc6aae4d2b4197774cf42- 1Snobfalse
- 2Expertfalse
- 3Literatefalse
- 4Intellectualtrue
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Answer : 4. "Intellectual"
Explanation :
Answer: D) Intellectual Explanation: The one word substitute for A person of good understanding knowledge and Reasoning power is Intellectual.
Q: What will remain unchanged if the quantity of the commodity changes?
2256 0613739463ee2bf25f512e1d4
613739463ee2bf25f512e1d4- 1Volumefalse
- 2Densitytrue
- 3massfalse
- 4loadfalse
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