QUIZ 120 - 29/4 (solution)
QUIZ 120 - 29/4 (solution)
………… lake is also known as “Gandipet”.
Gandhi Sagar lake
Govindsagar lake
Osman sagar lake
G.B Pant Sagar
 |
| source - trawell |
Osman Sagar Lake, also known as Gandipet, is a man-made reservoir located about 20 km west of Hyderabad, the capital city of Telangana state in India. The lake was built in 1920 across the Musi River to provide drinking water to the city of Hyderabad. It has a capacity of about 3.9 billion cubic feet of water and a surface area of about 46 square kilometers.
The lake was named after the last Nizam of Hyderabad, Mir Osman Ali Khan, who played a major role in its construction. The dam was built using local granite and limestone, and is about 18 meters high and 2.8 kilometers long. It is one of the oldest and largest dams in the region.
Osman Sagar Lake is an important source of drinking water for the city of Hyderabad, and also provides water for irrigation and industrial use. The lake is surrounded by hills and forests, and is home to a variety of flora and fauna, including migratory birds. It is a popular destination for boating, fishing, and picnicking, and also attracts tourists and nature lovers.
In recent years, the lake has faced several challenges, including pollution and encroachment. Industrial and human waste have been dumped into the lake, causing water quality issues and affecting the ecosystem. Additionally, some areas around the lake have been illegally occupied by settlements, leading to deforestation and habitat destruction.
Efforts are underway to address these challenges and restore the lake's ecological health. The Telangana State Pollution Control Board has initiated several measures to reduce pollution, including setting up sewage treatment plants and conducting regular water quality testing. The government has also taken steps to remove illegal encroachments and restore the lake's catchment area. These efforts are critical to preserving the ecological and social value of Osman Sagar Lake for future generations.
…………..is the Largest Saline water lake of India?
Chilka lake
Sambhar lake
Dull lake
Wular lake
source - tripadviser
Sambhar Lake is the largest saline water lake in India. The lake is located in the state of Rajasthan and covers an area of approximately 190 to 230 square kilometers. It is a shallow, endorheic salt lake, which means that it has no outflow to the sea and water exits only through evaporation, leaving behind salt and other minerals. The lake is an important habitat for migratory birds and is also a major source of salt production in the region. However, the lake is facing several environmental challenges, including pollution and encroachment, which are threatening its ecological health.
Which lake has recently got certificate from Marine Stewardship Council of India?
Vembanad lake
Ashtamundi lake
Chilkalake
Upper lake
source - wikipedia
Ashtamudi Lake in the southern state of Kerala is the first lake in India to receive a certification from the Marine Stewardship Council (MSC) for its sustainable management of fishery resources in 2021. Ashtamudi Lake is a brackish water lake located in the Kollam district of Kerala, and it is a vital source of livelihood for the local communities. The MSC certification recognizes the efforts of the local community to ensure the sustainable management of the lake's fishery resources, minimize the impact of fishing on the lake's ecosystem, and improve the socio-economic conditions of the local fishing communities.
Barotolerant bacteria tolerate pressure upto
50 atm
100 atm
200 atm
400 atm
Barotolerant bacteria are indeed able to tolerate pressure up to around 400 atmospheres (atm), which is a very high pressure and corresponds to depths of several thousand meters in seawater. These bacteria are adapted to live in environments with high hydrostatic pressure, such as deep-sea sediments, and are capable of surviving and growing at these extreme conditions.
……….. Used by gram negative bacteria for sexual reproduction & also for movement.
Flagella
Pilli
Fimbriae
Foot
source - wikipedia
The structure used by Gram-negative bacteria for sexual reproduction and movement is called the "pilus" or "pili". Pili are thin, hair-like structures that extend from the surface of the bacterial cell and are involved in a variety of functions, including attachment to surfaces, DNA transfer between bacteria, and movement via a process called "twitching motility". In contrast, flagella are whip-like structures used by bacteria for movement, but they are not involved in sexual reproduction. Fimbriae are also thin, hair-like structures that are used for attachment to surfaces but are not involved in sexual reproduction or movement.
Lines having Zero declination is known as the?
Isogonic lines
Zoogonic lines
Orbital lines
Agonic lines
source - textbook
The lines having zero declination are known as "agonic lines". The term "declination" refers to the angle between true north and magnetic north at a particular location on the Earth's surface. The Earth's magnetic field is not perfectly aligned with its geographic (true) north, and therefore, the angle of declination varies from place to place. Along the agonic lines, however, the magnetic north and true north coincide, and there is no declination. Isogonic lines, on the other hand, are lines connecting points of equal magnetic declination, and zoogonic and orbital lines are not commonly used geographic or magnetic terms.
……. Ponds are created by constructing a dyke or embankment across the water?
Excavated ponds
Embankment ponds
Both
None
source - walden effect
Embankment ponds are man-made water bodies that are created by constructing an embankment or a dam across a natural or artificial drainage channel or stream. These ponds are used for various purposes such as irrigation, drinking water supply, fisheries, and recreation. They can be found in both rural and urban areas, and are often constructed in areas where there is a shortage of water resources or where water supply is unreliable.
Embankment ponds are typically designed to capture and store water during the rainy season and release it slowly during the dry season, thus ensuring a steady supply of water throughout the year. They are often used for irrigation in agriculture, as the stored water can be used to irrigate crops during the dry season. Embankment ponds can also be used for drinking water supply, as the stored water can be treated and distributed to nearby communities.
Fisheries are another important use of embankment ponds, as they provide a suitable habitat for fish and other aquatic organisms. The ponds can be stocked with fish, and managed to ensure sustainable fish production. Embankment ponds can also be used for recreational purposes such as swimming, boating, and fishing.
Overall, embankment ponds are a valuable resource for communities, providing a reliable source of water for irrigation and drinking, supporting fisheries, and offering recreational opportunities.
Drive efficiency of V Belt drive is?
0-90%
90-95%
95%
99%
The drive efficiency of V-belt drives typically ranges from 95% to 98%, with some modern designs achieving efficiencies as high as 99%. The efficiency of a V-belt drive depends on various factors such as the quality of the belt and pulley, the tension in the belt, the speed of the drive, and the load being transmitted. In general, V-belt drives are considered to be highly efficient, with less power loss and less heat generation compared to other types of belt drives. However, regular maintenance and proper tensioning of the belt are necessary to maintain the efficiency of the V-belt drive.
According to Shannon and Weiner’s Diversity Index Clean water has Diversity Index (H)
>1
>2
>3
>4
Shannon and Weiner’s Diversity Index, also known as the Shannon-Weiner Index, is a measure of species diversity in a community. It takes into account both the number of species present and their relative abundances. The index is calculated as:
H = -Σ(pi * ln(pi))
Where H is the diversity index, pi is the proportion of individuals in the community belonging to the ith species, and ln is the natural logarithm.
The index value can range from 0 to infinity, where 0 represents no diversity and higher values indicate higher diversity.
Therefore, it is not possible to predict the Diversity Index (H) of clean water based on the information given. The diversity of a community depends on various factors such as the environment, the type of organisms present, and the interactions among them. Different types of clean water bodies can have different levels of diversity depending on these factors.
Dancing Cat disease is caused due to?
Lead
Mercury
Cadmium
Arsenic
Dancing Cat disease, also known as Minamata disease, is caused by exposure to high levels of mercury. It is a neurological disorder that affects the central nervous system and can lead to symptoms such as tremors, loss of coordination, and sensory disturbances.
The disease was first discovered in the 1950s in Minamata Bay, Japan, where industrial wastewater containing high levels of methylmercury was discharged into the bay. The local population, including cats that ate contaminated fish, began to show symptoms of the disease.
Therefore, the correct option for the causative agent of Dancing Cat disease is Mercury.
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