(Solved): In using halide torch leak detector, the flame colour imenediately becomes ........... indicating a ...

In using halide torch leak detector, the flame colour imenediately becomes ........... indicating a refrigerant leak [1 mark The electrochemical sensor will

when there is a refrigerant a leak. [1 mark 12 mark Compressors fall into two main categories namely:

SECTION B QUESTION 1 FIGURE I Air conditioning Unit a) Identify the uir conditioning unit in tigure 1 . i. Lebel the parts lettered 'A to H' m ii. Write the sequence of gas flow in the unit (figure I) b) List FOUR and explain any TWO ways of detecting leaks in refrigeration and ait-conditioning systems c) Briefly explain the principle of operation of the thernostatic expansion valve. [21/2 d) Identify three materials of which refrigeration systems are made of. e) State the colours of the materials in (d) when scraped on the surface f) How ean each of the materials in (d) be repaired when failed