21) A recently reclaimed alkaline soil should preferably be sown with a salt resistant crop, like
a) Wheat
b) cotton
c) barseem
d) any of the above
22) The river reach upstream of a newly built dam may behave as
a) aggrading
b) degrading
c) virgin
d) None of these
23) According to Khosla’s theory, the undermining of the floor starts from
(a) starting end
(b) intermediate point
(c) foundation bed
(d) tail end
24) Tortuosity in a meandering river, is
a) 1
b) <1
c) >1
d) None of these
25) An irrigation outlet is said to be proportional, when its
a) sensitivity = 1
b) flexibility = 1
c) setting = 1
d) none of these
26) Canal outlets are also called
a) canal escapes
b) canal modules
c) canal offtakes
d) canal openings
27) Assumed value of saturation gradient (H : V) in clay is
(a) 1 : 3
(b) 1 : 4
(c) 1 : 6
(d) 1 : 8
28) A free pipe outlet is a
a) rigid module
b) flexible module
c) non-module
c) non-module
d) all of the above
29) The ‘sefety valve’ of a dam is its
a) drainage gallery
b) inspection gallery
c) spillway
d) outlet sluices
30) The famous Bhakra dam of our country has been provided with
a) through spillway
b) ogee spillway
c) shaft spillway
d) siphon spillway