59) The mass of 1 cubic meter of cement concrete is
Answer is:
2500 kg
Related ISRO Technician-B Plumber Question Paper - 2019 (Set - 1) with Answer Key
Answer is:
Valves and taps are closed suddenly
Explanation:
Water hammer is caused in pipe lines when valves and taps are closed suddenly.
![Water hammer is caused in pipe lines when](https://mcqfinder.in/uploads/images/question-papers/isro-technician-b-plumber-2019-set-1/isro-technician-b-plumber-2019-set-1-id-60-e.jpg)
Answer is: