Practice Question and Answer
8Q: A periscope works by the principle of 3235 05b5cc678e4d2b4197774c183
5b5cc678e4d2b4197774c183- 1Total internal reflectiontrue
- 2Refractionfalse
- 3Diffractionfalse
- 4Reflection & Refractionfalse
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Answer : 1. "Total internal reflection"
Explanation :
Answer: A) Total internal reflection Explanation: A periscope is an optical instrument that uses a system of prisms, lenses, or mirrors to reflect images through a tube. Light from a distant object strikes the top mirror and is then reflected at an angle of 90 degrees down the periscope tube. At the bottom of the periscope, the light strikes another mirror and is then reflected into the viewer’s eye. Hence, A periscope works by the principle of Total internal reflection.
Q: The law of demand states that other things equal 1539 05b5cc678e4d2b4197774c17e
5b5cc678e4d2b4197774c17e- 1as the price increases, the quantity demanded will decrease.true
- 2as the price increases, the quantity demanded will increase.false
- 3as the price decreases, the demand curve will shift to the right.false
- 4as the price increases, the demand will decrease.false
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Answer : 1. "as the price increases, the quantity demanded will decrease."
Explanation :
Answer: A) as the price increases, the quantity demanded will decrease. Explanation:
Q: What was the final score of the super bowl 2018? 1332 05b5cc678e4d2b4197774c179
5b5cc678e4d2b4197774c179- 133false
- 243false
- 341true
- 438false
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Answer : 3. "41"
Explanation :
Answer: C) 41 Explanation: The Super Bowl is the annual championship game of the National Football League (NFL). In Super bowl 2018, the Eagles secured a 41-33 victory, and the celebration of the franchise's first Super Bowl victory was on.
Q: Which would provide the body with the most energy? 2489 05b5cc678e4d2b4197774c174
5b5cc678e4d2b4197774c174- 1Breaking a single carbon bondfalse
- 2Forming bonds between two amino acidsfalse
- 3Creating bonds to form a carbohydratefalse
- 4Breaking the bonds in a monosaccharidetrue
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Answer : 4. "Breaking the bonds in a monosaccharide"
Explanation :
Answer: D) Breaking the bonds in a monosaccharide Explanation:
Q: In which layer is the pressure the highest? 1535 05b5cc678e4d2b4197774c16a
5b5cc678e4d2b4197774c16a- 1Ionospherefalse
- 2Stratospherefalse
- 3Tropospherefalse
- 4Inner coretrue
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Answer : 4. "Inner core"
Explanation :
Answer: D) Inner core Explanation: "Pressure" is the ratio of mass to area. So, for any given area, the one with more mass pressing on it will experience a higher pressure. As you go more deeply into the atmosphere OR earth itself, you are putting more and more mass over you. For the same unit area therefore, the pressure, (mass/area) increases. Hence, the lowest layer will always have the highest pressure i.e, inner core.
Q: One year ago the ratio between Maneela’s and Shanthi’s salary was 3 : 4. The ratios of their individual salaries between last year’s and this year’s salaries are 4 : 5 and 2 : 3 respectively. At present the total of their salary is Rs. 4160. The salary of Maneela, now is? 6020 05b5cc678e4d2b4197774c165
5b5cc678e4d2b4197774c165- 1Rs. 1600true
- 2Rs. 1700false
- 3Rs. 1800false
- 4Rs. 1900false
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Answer : 1. "Rs. 1600"
Explanation :
Answer: A) Rs. 1600 Explanation: Let the salaries of Maneela and Shanthi one year before be M1, S1 & now be M2, S2 respectively. Then, from the given data, M1/S1 = 3/4 .....(1) M1/M2 = 4/5 .....(2) S1/S2 = 2/3 .....(3) and M2 + S2 = 4160 .....(4) Solving all these eqtns, we get M2 = Rs. 1600.
Q: Mohan spends 23% of an amount of money on an insurance policy, 33% on food, 19% on children’s education and 16% on recreation. He deposits the remaining amount of Rs. 504 in bank. How much amount does he spend on food and insurance policy together? 1443 05b5cc678e4d2b4197774c160
5b5cc678e4d2b4197774c160- 1Rs. 2326false
- 2Rs. 5876false
- 3Rs. 1741false
- 4Rs. 3136true
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Answer : 4. "Rs. 3136"
Explanation :
Answer: D) Rs. 3136 Explanation: Let total amount = Rs. P Total expenditure = (23 + 33 + 19 + 16)% of P = 91%ofP Remaining money = (100 - 91)% of P = 9% of P But given in the question that, 9% of P = 504 9p/100 = 504 => P = 50400/9 => P = Rs. 5600 Required money spent on Food & Insurance = 23 + 33 % = 56% of 5600 = 56 x 5600/100 = 56 x 56 = Rs. 3136
Q: Hormones are chemicals secreted and regulated by the endocrine system. 1365 05b5cc678e4d2b4197774c15d
5b5cc678e4d2b4197774c15d- 1TRUEtrue
- 2FALSE Answer & Explanation Answer:false
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Answer : 1. "TRUE"
Explanation :
Answer: A) TRUE Explanation: True. Hormones are chemicals secreted and regulated by the endocrine system.