5) The filling time required for a tank having capacity 1500 liters by a pump duty of 0.5 liters per second

6) Find the HP of pumpset with efficiency of 50 percent required to fill a water storage tank at a discharge rate of 120 litres per second and the total head of 20 meters is

7) In electrical language DC refers to

8) Which of the following is used in gaseous form in water for disinfection?

9) A line of pipes including all fittings and equipments such as manholes, traps etc. is called