11) The canal, which can irrigate only on one side, is a
a) watershed canal
b) contour canal
c) side slope canal
d) None of these
12) The crest level of the distributary head is generally kept at ______ higher than the bed level of the
parent channel.
(a) 0.3 to 1.0 m
(b) 1.2 – 1.8 m
(c) 2.0 to 2.5 m
(d) more than 2.5 m
13) The most important shape parameter in sediment analysis is
a) sphericity
b) Shape factor
c) roundness
d) form factor
14) By greater fluming the canal
width of aqueduct is reduced.
the length of transition wings is increased
(a) both 1 and 2 are correct
(b) 1 is correct but 2 is wrong
(c) 1 is wrong but 2 is correct
(d) both 1 and 2 are wrong
15) In Lacey’s regime theory, the velocity of flow is proportional to
a) Qf2
b) Q/f2
c) (Qf2)1/6
d) (Q/f2)1/6
16) The infertility of the soil in waterlogged area is due to
(a) death of bacteria causing nutrification
(b) increase in salinity
(c) growth of weeds
(d) all of the above
17) The total number of independent equations that from the Lacey regime theory is
a) 6
b) 10
c) 3
d) 4
18) The bed of an alluvial channel along the flow will always be
a) flat
b) way
c) duned and rippled
d) any of the above is possible
19)Theoretically the best cross section for a lined canal is
a) semicircular
b) triangular
c) Trapezoidal
d) None of these
20) Tile drains increase crop yield by
(a) removing the free gravity water that is not directly available to the plants
(b) increasing air circulation
(c) reducing and removing toxic substances such as sodium and other soluble salts
(d) all the above