Practice Question and Answer
8 Q: In solving a problem, one student makes a mistake in the coefficient of the first degree term and obtains – 9 and – 1 for the roots. Another student makes a mistake in the constant term of the equation and obtains 8 and 2 for the roots. The correct equation was
3359 05e327c5bd0aa6f23a8fc6e21
5e327c5bd0aa6f23a8fc6e21- 1x2 + 10x + 9 = 0false
- 2x2 – 10x = 16 = 0false
- 3x2 – 10x + 9 = 0true
- 4None of thesefalse
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Answer : 3. "x2 – 10x + 9 = 0"
Q: A periscope works by the principle of 3357 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: Ratio of the principal and the amount after 5 year is 10:12. Then the rate of interest per annum is
3357 05f0d4876cec10557a8deaea7
5f0d4876cec10557a8deaea7- 18%false
- 220%true
- 312%false
- 416%false
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Answer : 2. "20% "
Q: The ratio of managers to management trainees is 3:5. When 21 new management trainees are recruited, the ratio will become 3:8. How many managers will there be in the group? 3356 05d1b03a78a754124194a7515
5d1b03a78a754124194a7515- 127false
- 224false
- 321true
- 4Cannot be determinedfalse
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Answer : 3. "21"
Q: The blood vessel supplying blood to the kidney is
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5de50d8f5406ef2a4a569aae- 1the renal arteryfalse
- 2the hepatic arteryfalse
- 3the pulmonary arteryfalse
- 4the carotid arterytrue
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Answer : 4. "the carotid artery "
Q: The combination of ALU and Control Unit jointly known as
3355 05ea262b8d3396d16da841d28
5ea262b8d3396d16da841d28- 1Hard diskfalse
- 2Monitorfalse
- 3CPUtrue
- 4UPSfalse
- 5Softwarefalse
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Answer : 3. "CPU"
Q: 260-metre-long train can cross a wall of 120 metre in 19 seconds. What is the speed of train in km/hr? 3354 15d15df2a7567c2609b568584
5d15df2a7567c2609b568584- 127false
- 249false
- 372true
- 470false
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Answer : 3. "72"
Q: Popshot, the world's first-ever interactive browser built for smartphones was launched in which country?
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5d2f030eef05af7bbe094b81- 1Chinafalse
- 2Indiatrue
- 3Singaporefalse
- 4Francefalse
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