Practice Question and Answer
8 Q: If $$ \ {xy\over x+y}= a, $$ $${xz\over x+z}=b $$ and $$ {yz\over y+z} =c $$ where a, b, c are all non – zero numbers, then x equals to
2234 05da8441eb247ec0cc95f4c77
5da8441eb247ec0cc95f4c77- 1$$ 2abc\over {ab+bc-ac} $$false
- 2$$ 2abc\over {ab+ac-ac} $$false
- 3$$ 2abc\over {ac+bc-ab} $$true
- 4$$ 2abc\over {ac+bc-ac} $$false
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Answer : 3. "$$ 2abc\over {ac+bc-ab} $$"
Q: A man walks a certain distance and rides back in 4 hours 30 minutes. he could ride both ways in 3 hours. The time required by the man to walk both ways is
2234 05f353cb54e31882c043ce0e4
5f353cb54e31882c043ce0e4- 15 hoursfalse
- 26 hourstrue
- 34 hours 30 minutesfalse
- 44 hours 45 minutesfalse
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Answer : 2. "6 hours "
Q: Which state has launched 'Yodhavu' mobile app?
2234 05e4ba555b1e50713d8439cc7
5e4ba555b1e50713d8439cc7- 1Tamil Nadufalse
- 2Karnatakafalse
- 3Keralatrue
- 4Andhra Pradeshfalse
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Answer : 3. "Kerala"
Q: Full convertibility of a rupee means ? 2234 05b5cc723e4d2b4197774f6a9
5b5cc723e4d2b4197774f6a9- 1Determination of rate of exchange between rupee and foreign currencies freely by the market forces of demand and supplytrue
- 2Repayment of loans in terms of rupeesfalse
- 3Payment for imports in terms of rupeesfalse
- 4Purchase of foreign exchange for rupees freelyfalse
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Answer : 1. "Determination of rate of exchange between rupee and foreign currencies freely by the market forces of demand and supply"
Explanation :
Answer: A) Determination of rate of exchange between rupee and foreign currencies freely by the market forces of demand and supply Explanation:
Q: Which of the following Indian Movie won best cinematography at 2019 Beijing International Film Festival? 2234 05cbff8cb43e4233c1d18dc6c
5cbff8cb43e4233c1d18dc6c- 1Sanjufalse
- 2Bhayanakamtrue
- 32.0false
- 4Badhaai Hofalse
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Answer : 2. "Bhayanakam"
Q: Select the figure that can replace the question mark (?) in the following series.
2234 05ffea2b5c967b15c38d9ed89
5ffea2b5c967b15c38d9ed89- 1true
- 2false
- 3false
- 4false
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Answer : 1. "
"
Q: Marketing refers to - 2233 05b5cc6bbe4d2b4197774d825
5b5cc6bbe4d2b4197774d825- 1Execution of salesfalse
- 2Planning sales campaignsfalse
- 3Advertising and promotionsfalse
- 4Philosophy that stresses customer value and satisfactiontrue
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Answer : 4. "Philosophy that stresses customer value and satisfaction"
Explanation :
Answer: D) Philosophy that stresses customer value and satisfaction Explanation:
Q: Two metallic plate of equal thickness and coefficient thermal conductivity K1 and K2 put together face to face. A common plate is constructed. What is equivalent K? 2233 05b5cc6bfe4d2b4197774d9e7
5b5cc6bfe4d2b4197774d9e7- 1K1k2/k1+k2false
- 22k1k2/k1+k2true
- 3K1+k2/k1k2false
- 4Nonefalse
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Answer : 2. "2k1k2/k1+k2"
Explanation :
Answer: B) 2k1k2/k1+k2 Explanation: We know that, The equivalent K = L1 + L2L1K1+L2K2 where L1 & L2 are plate1 & Plate2 thicknesses, K1 & K2 are coefficient thermal conductivity of plate1 & Plate2 respectively. But here L1 = L2 = L (say) Then K = L+L/(L/K1 + L/K2) = 2K1K2K1+K2