Correct answer
D. to guard against water hammer
Explanation
The correct answer is to guard against water hammer.
According to the steel beam theory of doubly reinforced beams________?
Study the following statements?
If D.O. concentration falls down to zero in any natural drainage, it indicates the zone of________?
A pycnometer is used to determine________?
Two objects moving with uniform speeds are 5 m apart after 1 second when they move towards each other and are 1 m apart when they move in the same direction. The speeds of the objects are________?
Calm period is the percentage of time during which wind intensity is less than________?