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Daily Quiz: July 13
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- Question 1 of 7
1. Question
1 pointsConsider the following statements about Doppler weather radar (DWR):
- It uses the Doppler effect by bouncing a Infrared signal off a desired target to produce velocity data.
- It mainly gives information about wind velocity.
Which of the above statement(s) is/are correct?
Correct
Statement 1 is incorrect. Doppler weather radar is an observational tool for monitoring and predicting severe weather events such as hailstorms, thunder storms, cyclones and tornados. It uses the Doppler effect by bouncing a microwave signal off a desired target to produce velocity data.
Statement 2 is correct. It gives information about wind velocity and also about precipitation.
Incorrect
Statement 1 is incorrect. Doppler weather radar is an observational tool for monitoring and predicting severe weather events such as hailstorms, thunder storms, cyclones and tornados. It uses the Doppler effect by bouncing a microwave signal off a desired target to produce velocity data.
Statement 2 is correct. It gives information about wind velocity and also about precipitation.
- Question 2 of 7
2. Question
1 pointsWhich of the following are correct about Juno spacecraft?
Correct
Both the statements are correct.
About Juno:
- It is orbiting Jupiter from pole to pole, 5,000 kilometers above planet’s cloud tops.
- Its mission is to understand the origin and evolution of Jupiter, investigate the existence of a solid planetary Jupiter’s core, map Jupiter’s intense magnetic field, measure the amount of water and ammonia in the deep atmosphere and observe Jupiter’s aurora.
Incorrect
Both the statements are correct.
About Juno:
- It is orbiting Jupiter from pole to pole, 5,000 kilometers above planet’s cloud tops.
- Its mission is to understand the origin and evolution of Jupiter, investigate the existence of a solid planetary Jupiter’s core, map Jupiter’s intense magnetic field, measure the amount of water and ammonia in the deep atmosphere and observe Jupiter’s aurora.
- Question 3 of 7
3. Question
1 pointsNASA has launched world’s lightest satellite weighing only 64 grams. Which of the following statements are correct about KalamSat?
Correct
Statement 1 is incorrect. KalamSat is a 3-D printed satellite. This is the first time that 3-D printing technology is used to make satellites.
Statement 2 is correct. KalamSat satellite weighs only 64 grams which is lighter than a smartphone. The satellite is made up of reinforced carbon fibre polymer.
About KalamSat:
- The competition was all about creating an experimental satellite that would fit in a 4 metre cube and also possess an accurate mass of 64 grams, which can be sent to space.
- The aim of the project is to take the performance of new technology to space.
- The tiny satellite is supposed to operate for 12 minutes in a micro-gravity environment of space.
Incorrect
Statement 1 is incorrect. KalamSat is a 3-D printed satellite. This is the first time that 3-D printing technology is used to make satellites.
Statement 2 is correct. KalamSat satellite weighs only 64 grams which is lighter than a smartphone. The satellite is made up of reinforced carbon fibre polymer.
About KalamSat:
- The competition was all about creating an experimental satellite that would fit in a 4 metre cube and also possess an accurate mass of 64 grams, which can be sent to space.
- The aim of the project is to take the performance of new technology to space.
- The tiny satellite is supposed to operate for 12 minutes in a micro-gravity environment of space.
- Question 4 of 7
4. Question
1 pointsResearchers had isolated Helicobacter pullorum bacterium in chicken that may be the source of transmission of the multidrug resistance pathogen to humans. Which of the following statements regarding Helicobacter pullorum are true?
Correct
Both the options and b are correct.
More about Helicobacter pullorum:
- Helicobacter pullorum is a pathogen commonly found in the liver and gut of poultry birds including chickens.
- It is untreatable and may be cancer-causing. It is being suspected that H. pullorum is resistant to wide range of antibiotics such as fluoroquinolones, cephalosporins, sulfonamides and macrolides.
- Infected chicken with Helicobacter pullorum bacterium when consumed are known to cause gastrointestinal infections in humans.
- Besides, Helicobacter pullorum is known to produce a cancer causing agent called cytolethal distending toxin.
- This toxin damages the DNA and interferes with the cell cycle. Since this multidrug resistance bacterium also infects the liver, it increases the risk of cancer in the organ.
Incorrect
Both the options and b are correct.
More about Helicobacter pullorum:
- Helicobacter pullorum is a pathogen commonly found in the liver and gut of poultry birds including chickens.
- It is untreatable and may be cancer-causing. It is being suspected that H. pullorum is resistant to wide range of antibiotics such as fluoroquinolones, cephalosporins, sulfonamides and macrolides.
- Infected chicken with Helicobacter pullorum bacterium when consumed are known to cause gastrointestinal infections in humans.
- Besides, Helicobacter pullorum is known to produce a cancer causing agent called cytolethal distending toxin.
- This toxin damages the DNA and interferes with the cell cycle. Since this multidrug resistance bacterium also infects the liver, it increases the risk of cancer in the organ.
- Question 5 of 7
5. Question
1 pointsWhich of the following statements are correct?
- ‘Tasmanian devil’ is the largest carnivorous marsupial in the world.
- Superbugs are deadly bacteria which can only be treated by antibiotics.
Correct
Statement 1 is correct.
Statement 2 is incorrect. Superbugs are deadly bacteria which cannot be treated by current antibiotics and other drugs.
About Tasmanian devil:- The Tasmanian devil is a carnivorous marsupial belonging to the family Dasyuridae.
- They are endemic in the wild only in Tasmania, island state of Australia.
- It is largest carnivorous marsupial in the world. It has stocky and muscular build, black fur, pungent odour, keen sense of smell and extremely loud and disturbing screech.
- Its large head and neck allow it to generate strongest bites per unit body mass among any extant mammal land predator.
Incorrect
Statement 1 is correct.
Statement 2 is incorrect. Superbugs are deadly bacteria which cannot be treated by current antibiotics and other drugs.
About Tasmanian devil:- The Tasmanian devil is a carnivorous marsupial belonging to the family Dasyuridae.
- They are endemic in the wild only in Tasmania, island state of Australia.
- It is largest carnivorous marsupial in the world. It has stocky and muscular build, black fur, pungent odour, keen sense of smell and extremely loud and disturbing screech.
- Its large head and neck allow it to generate strongest bites per unit body mass among any extant mammal land predator.
- Question 6 of 7
6. Question
1 pointsHow does a microwave oven cook food faster?
- It stores a lot of energy.
- Microwaves are absorbed by food molecules.
- Very less energy is wasted in heating the utensils.
Correct
Statement 1 is incorrect, while Statement 2 and 3 are correct. Therefore, the correct option is b.
Microwave ovens are so quick and efficient because they channel heat energy directly to the molecules (tiny particles) inside the food.
Incorrect
Statement 1 is incorrect, while Statement 2 and 3 are correct. Therefore, the correct option is b.
Microwave ovens are so quick and efficient because they channel heat energy directly to the molecules (tiny particles) inside the food.
- Question 7 of 7
7. Question
1 pointsWith reference to the smallest star discovered in the universe named EBLM J0555-57Ab, which of the following statements are correct?
- It has enough mass to enable the fission of hydrogen nuclei to helium at its centre.
- The star was identified by NASA.
Correct
Ans: d
Both the statements are incorrect.
Statement 1 is incorrect. It has just enough mass to enable the fusion (not fission, as mentioned in the question) of hydrogen nuclei into helium at its centre .
Statement 2 is incorrect. The star was identified by SuperWASP, a planet-finding experiment run by several universities. It was detected when it passed in front of its larger parent star, forming an eclipsing stellar binary system.
More Details:
- It is slightly larger than Saturn in size and may possibly have Earth-sized planets with liquid water in its orbit.
- The discovery of EBLM J0555-57A also makes the best possible candidate for detecting Earth-sized planets which can have liquid water on their surfaces, such as TRAPPIST-1, an ultra-cool dwarf surrounded by seven temperate Earth-sized worlds.
Incorrect
Ans: d
Both the statements are incorrect.
Statement 1 is incorrect. It has just enough mass to enable the fusion (not fission, as mentioned in the question) of hydrogen nuclei into helium at its centre .
Statement 2 is incorrect. The star was identified by SuperWASP, a planet-finding experiment run by several universities. It was detected when it passed in front of its larger parent star, forming an eclipsing stellar binary system.
More Details:
- It is slightly larger than Saturn in size and may possibly have Earth-sized planets with liquid water in its orbit.
- The discovery of EBLM J0555-57A also makes the best possible candidate for detecting Earth-sized planets which can have liquid water on their surfaces, such as TRAPPIST-1, an ultra-cool dwarf surrounded by seven temperate Earth-sized worlds.