Correct answer
B. ultra violet rays treatment
Explanation
The correct answer is ultra violet rays treatment.
The strength of concrete after one year as compared to 28 days strength is about________?
Coefficient of discharge of an ogee spillway________?
Which of the following premix methods is used for base course?
The distance through which the tongue rail moves laterally at the toe of the switch for movement of trains is called________?
If the depth of flow in a circular sewer is 1/4th of its diameter D, the wetted perimeter is________?
Minimum potential energy of a system will be in the position of________?