The tapping of the distribution pipe from the base of the storage cistern is at.........mm

Here are the solutions to the questions:

12. The tapping of the distribution pipe from the base of the storage cistern is at.........mm
To prevent sediment from entering the distribution pipe, it is typically tapped a short distance above the base of the cistern. A common standard for this height is $25 \, \text{mm}$.
The correct option is C.

13. The specific heat capacity of water is ....kJ/kg°c.
The specific heat capacity of water is approximately $4.186 \, \text{kJ/kg}^\circ\text{C}$.
The correct option is B.

14. ...................is the ability to do work.
Energy is defined as the ability to do work.
The correct option is D.

15. The continuous leaking of a tap through a spindle is caused by faulty............
Leaks around the spindle of a tap are typically caused by worn or faulty packing (also known as gland packing or O-rings) which seals the spindle.
The correct option is C.

16. Convert $37^\circ\text{C}$ into $^\circ\text{F}$