Top 150+ Solved Irrigation Engineering MCQ Questions Answer
Q. Select the incorrect statement.
a. Intensive irrigation should be avoided in areas susceptible to water logging.
b. Extensive irrigation should be adopted in areas susceptible to water logging.
c. Lift irrigation increases water logging.
d. all of the above
Q. A land is known as waterlogged
a. when the permanent wilting point is reached
b. when gravity drainage has ceased
c. capillary fringe reaches the root zone of plants
d. none of the above
Q. Lining of irrigation channels
a. increases the waterlogging area
b. decreases the waterlogging area
c. does not change the water logging area
d. none of the above
Q. A runoff river plant is
a. a low head scheme
b. a medium head scheme
c. a high head scheme
d. none of the above
Q. The net speed under which the turbine reaches its peak efficiency is called
a. design speed
b. rated speed
c. gross speed
d. operating speed
Q. A runoff river plant
a. is a medium head scheme
b. generates power during peak hours only
c. is suitable only on a perennial river
d. has no pondage at all
Q. The net head under which the turbine reaches its peak efficiency at synchronous speed iscalled
a. design head
b. rated head
c. gross head
d. operating head
Q. The ratio of the average load to the installed capacity of the plant whose reserve capacity iszero will be equal to
a. load factor
b. plant factor
c. utilisation factor
d. both (a) and (b)
Q. A hydroelectric scheme operating under a head of 80 m will be classified as
a. low head scheme
b. medium head scheme
c. high head scheme
d. none of the above
Q. A hyetograph is a graphical representation of
a. rainfall intensity and time
b. rainfall depth and time
c. discharge and time
d. cumulative rainfall and time
Q. Variability of rainfall isi) largest in regions of high rainfallii) largest in coastal areasiii) largest in regions of scanty rainfallThe correct answer is
a. only (i)
b. (i) and (ii)
c. only (iii)
d. (ii) and (iii)
Q. In India, which of the following is adopted as standard recording raingauge ?
a. Symon's raingauge
b. tipping bucket type
c. natural syphon type
d. weighing bucket type
Q. The maximum average depth due to one day storm over an area of 100 km2 is 100 mm. Depth-Area-Duration (DAD) curves indicate that for the same area of 100 km2 the maximum average depth for a 3 hour storm will be
a. 100 mm
b. more than 100 mm
c. less than 100 mm
d. none of the above
Q. The maximum rainfall depth of 300 mm in 24 hours has a return period of 100 years. The probability of 24 hours rainfall equal to or greater than 300 mm occurring at least once in 10 years is given by
a. (0.99)10
b. 1 - (0.99)10
c. (0.9)'00
d. l-(0.9)100
Q. The most suitable chemical which can be applied to the water surface for reducingevaporation is
a. methyl alcohol
b. ethyl alcohol
c. cetyl alcohol
d. butyl alcohol