The crest of the under-sluices should be lower than the crest of the head regulator (if silt excluder is provided by at least

The crest of the under-sluices should be lower than the crest of the h

1.	The crest of the under-sluices should be lower than the crest of the head regulator (if silt excluder is provided by at least
A.	1 to 1.2 m
B.	1.8 to 2 m
C.	2 to 2.5 m
D.	4 to 5 m
Answer» C. 2 to 2.5 m