1. The main cause of silting in channel is ?

non-regime section

inadequate slope

defective head regulator

all of these

Answer: all of these

Explanation:


2. The infertility of the soil in water-logged areas is due to ?

inhibiting activity of the soil bacteria

growth of weeds

increasing of harmful salts

all of these

Answer: all of these

Explanation:


3. Garret's diagram gives the graphical method of designing a channel based on ?

Lacey's theory

Gibb's theory

Kennedy's theory

Khosla's theory

Answer: Kennedy's theory

Explanation:


4. A contour canal ?

is most suitable in hilly areas

irrigates only on one side

is aligned parallel to the contour of the country

all of the above

Answer: all of the above

Explanation:


5. The knowledge of hydrology is necessary in civil engineering for ?

designing and construction of irrigation structures

designing and construction of bridges and culverts

flood control works

all of these

Answer: all of these

Explanation:


6. The consumptive use of water of a crop ?

is measured as the volume of water per unit area

is measured as depth of water on irrigated area

may be supplied partly by precipitation and partly by irrigation

all of the above

Answer: all of the above

Explanation:


7. Sandy soils with good drainage become impermeable after prolonged use, if it is irrigated with water containing ........ sodium ?

25%

50%

75%

85%

Answer: 85%

Explanation:


8. The crops require maximum water during ?

first watering before sowing the crops

last watering before harvesting

first watering when the crop has grown a few centimetres

all of the above

Answer: first watering when the crop has grown a few centimetres

Explanation:


9. For the repairing of an old but sound concrete lining, the lining preferred is ?

shotcrete lining

precast concrete lining

soil cement lining

sodium carbonate lining

Answer: shotcrete lining

Explanation:


10. Liquid precipitation consists of ?

snow

hail

sleet

rainfall

Answer: rainfall

Explanation: