510Civil EngineeringMedium
In case of sewer lines________?
AAll the above
BWater test is carried out to check water tightness of the joints
CObstruction test is carried out with the help of smooth ball of diameter 13 mm
DTest for straightness is carried out with the help of a lamp and mirror
Correct answer
A. All the above
Explanation
The correct answer is All the above.