Tag: biology

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Questions Related to biology

Multiple choice biology soil : our life soil properties soil - properties basics of soil pollution

The normal capacity of percolation tank is 

  1. 7.0 mm/day

  2. 7.87 mm/day

  3. 5.87 mm/day

  4. 0.87 mm/day
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Percolation tanks are the most prevalent structures as it is a measure to recharge the groundwater reservoir both in alluvial as well as hard rock formations.The size of percolation tank should be governed by percolation capacity of strata in the tank bed. Normally, the capacity of percolation tank is 7.87 mm/day.

So, the correct answer is option B.

Multiple choice biology soil : our life soil properties soil - properties basics of soil pollution

Percolation tank is the storage of water for 

  1. Domestic pupose

  2. Industrial use

  3. Irrigation

  4. Both A and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The percolation tanks are constructed on the land which is highly permeable. The water which gets collected in the tank is then percolated in the ground. This system helps to recharge the groundwater system. The water can be used by constructing borewells for domestic purpose. Canals can be constructed which can be used for the purpose of irrigation and cultivation of crops. 

Thus, the correct answer is option D. 

Multiple choice biology soil : our life soil properties soil - properties basics of soil pollution

The depth of the percolation tank is limited to the .......... of the height between bed level and full storage level.

  1. Half

  2. One fourth

  3. One third

  4. Same
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Percolation tank is an artificially created surface water body, submerging in its reservoir a highly permeable land so that surface runoff is made to percolate and recharge the ground water storage. The size of percolation tank should be governed by percolation capacity of strata in the tank bed and the cut-off trench is to be provided below the earthen bund with depth limited to one-fourth of the height between bed level and full storage level. 
So, the correct answer is option B.
Multiple choice biology soil : our life soil properties soil - properties basics of soil pollution

The lower percolation rate refers that the soil

  1. Can hold water for less time

  2. Can hold water for more time

  3. Cannot hold water

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Percolation rate of a soil is the water absorption rate of the soil. It depends on the composition of the soil. It is different for different types of soil. Hence, it helps in selection of proper soil for the crop growth. Soil with lower percolation has high water retention capacity whereas soil with high percolation has low water retention capacity. Lower percolation rate refers that the soil can hold water for more time while higher percolation rate refers that the soil can hold water for less time. 

Thus, the correct answer is option B. 

Multiple choice biology soil : our life soil properties soil - properties basics of soil pollution

The type of soil which can hold water for more time have 

  1. Lower percolation rate

  2. Higher percolation rate

  3. Intermediate percolation rate

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Percolation rate of a soil is the water absorption rate of the soil. It depends on the composition of the soil. It is different for different types of soil. Hence, it helps in selection of proper soil for the crop growth. Soil with lower percolation has high water retention capacity whereas soil with high percolation has low water retention capacity. Lower percolation rate refers that the soil can hold water for more time while higher percolation rate refers that the soil can hold water for less time. 

Thus, the correct answer is option A. 

Multiple choice biology soil : our life soil properties soil - properties basics of soil pollution

The rate of water absorption by the soil defines the 

  1. Rate of water movement

  2. Rate of seeping

  3. Rate of percolation

  4. Rate of absorption
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Percolation rate of a soil is the rate of water absorption by the soil. It depends on the composition of the soil. It is different for different types of soil. Hence, it helps in selection of proper soil for the crop growth. Soil with lower percolation rate has high water retention capacity whereas soil with high percolation rate has low water retention capacity. 

Thus, the correct answer is option C.