Tag: evs

Questions Related to evs

Which of the following irrigation system used rope, container and well?

evs flow of water irrigation irrigation and its types irrigation and types

  1. Dhekli

  2. Moat

  3. Drip irrigation

  4. Chain pump

Show answer
Correct Option: A
Explanation:
Dhekli is a traditional system of irrigation which is mainly seen in rural areas. In this system, ropes and a container are used to get water from a well to irrigate the land.
Moat is a manual irrigation method by which water is directly taken out of wells with the help of pulley and is used to irrigate fields. 
Drip irrigation is a form of irrigation that saves water and fertilizer by allowing water to drip slowly to the roots of many different plants, either onto the soil surface or directly onto the root zone, through a network of valves, pipes, tubing, and emitters.
The chain pump is type of a water pump in which several circular discs are positioned on an endless chain. One part of the chain dips into the water, and the chain runs through a tube, slightly bigger than the diameter of the discs.
So, the correct answer is option A.

The wheel in rahat irrigation system is turned by

evs flow of water irrigation irrigation and its types irrigation and types

  1. Oxen

  2. Cows

  3. Humans

  4. Both A and B

Show answer
Correct Option: D
Explanation:

Rahat is the system which uses animals as the labour it is an old type of method of irrigation in which wheels were used to take water out of the well. These wheels were turned by oxen and cows by tieing the ropes to their body.

So, the correct option is 'Both A and B'.

.......... is used to bring bucket of water where the water is needed.

evs flow of water irrigation irrigation and its types irrigation and types

  1. Moat

  2. Rahat

  3. Dhekli

  4. Chain pump

Show answer
Correct Option: A
Explanation:

Moat system of irrigation involves the process of taking out of water directly from the well and supplied to the irrigation field. It consists a bucket tied to a rope attached to the well by pulley system. 

So, the correct option is 'Moat'.

Which of the following is pulley system of irrigation?

evs flow of water irrigation irrigation and its types irrigation and types

  1. Rahat

  2. Dhekli

  3. Moat

  4. None of the above

Show answer
Correct Option: C
Explanation:

Moat is a type of pulley system which involves pulling up of water from the well with the help of a bucket. It is a manual method of irrigation in which waster is directly taken out of the well. 

So, the correct option is 'Moat'.

Which of the following system is useful to lift water from the depth of 6 meters?

evs flow of water irrigation irrigation and its types irrigation and types

  1. Rahat

  2. Chain pump

  3. Dhekli

  4. Moat

Show answer
Correct Option: B
Explanation:

Chain pump system consists of two large wheels tied at both ends with a chain where the whee; is rotated using the chain and water is filled in the buckets and poured of into the field. It has the capacity to lift up water upto  a depth of approx 10m.

So, the correct option is 'Chain pump'.

Which of the following irrigation method consists circular discs?

evs flow of water irrigation irrigation and its types irrigation and types

  1. Rahat

  2. Dhekli

  3. Chain pump

  4. Pulley system

Show answer
Correct Option: C
Explanation:

Chain pump system consists of two large wheels tied at both ends with a chain where the wheel is rotated using the chain and water is filled in the buckets and poured off into the field. The wheel is rotated with the help of circular discs which are positioned at the end of the chains.

So, the correct option is 'Chain pump'.

Prolonged liberal irrigation of agricultural fields is likely to create the problem of

evs flow of water irrigation irrigation and its types irrigation and types

  1. Acidity

  2. Aridity

  3. Salinity

  4. Metal toxicity

Show answer
Correct Option: C
Explanation:

Soluble salts leach out of soil due to prolonged irrigation. As a result the soil becomes rich in salts causing soil salinity. So, the correct option is 'Salinity'.

Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield ?

evs flow of water irrigation irrigation and its types irrigation and types

  1. Frequent irrigation of the crop

  2. Treatment of the plants with cytokinins alongwith a small dose of nitrogenous fertilizer

  3. Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5- trichlorophenoxy acetic acid

  4. Application of iron and magnesium to promote synthesis of chlorophyll

Show answer
Correct Option: D
Explanation:
If a pulse crop possesses premature yellowing of leaves and decrease in yield then application of magnesium and iron to promote the synthesis of chlorophyll may become most beneficial to overcome the problem and to obtain maximum seed yield.  Magnesium is an important part of the ring structure of the chlorophyll molecule and its deficiency causes chlorosis and premature I leaf abscission. In iron deficiency also, the leaves become chlorotic because iron is required for the synthesis of some of the chlorophyll-protein complexes in the chloroplast.

So, the correct answer is 'Application of iron and magnesium to promote the synthesis of chlorophyll'.

Indira Gandhi Canal has brought greenery to

evs flow of water irrigation irrigation and its types irrigation and types

  1. Haryana

  2. Rajasthan

  3. Karnataka

  4. Andhra Pradesh

Show answer
Correct Option: B
Explanation:

Indira Gandhi canal is an important irrigation canal in India. It starts from Firozpur of Punjab and terminates its irrigation facilities in Thar Desert of Rajasthan. The canal passes seven districts of Rajasthan namely Barmer, Bikaner, Churu, Hanumangarh, Jaisalmer, Jodhpur, and Sriganganagar. Hence it has brought greenery to Rajasthan. Thus the correct answer is option B.

The major defects of rubber belts are

evs flow of water irrigation irrigation and its types irrigation and types

  1. Costly

  2. Slips on wet

  3. Early rubbed

  4. Increased due to heat

Show answer
Correct Option: B
Explanation:

Rubber belt slips on wet due to loosing of grip. It also slips because the rubber is a type of material that always remains compressed in nature. Rubber belts are made up of synthetic rubbers or natural rubber.                                     So, the correct option is 'Slips on wet'.