REFRIGERATION AND AIR CONDITIONING Set 1

Brine ✘ NH3 ✘ Freon ✘ Air ✔

Driers ✘ Filter-driers ✘ Dessicants ✘ All of the above ✔

Increases COP ✘ Decreases COP ✘ COP remains unaltered ✘ Other factor decided COP ✔

High ✘ Low ✘ Optimum ✘ Any value ✔

Vapour absorption refrigerator ✘ Vapour compression refrigerator ✘ Electrolux refrigerator ✘ Carnot refrigerator ✔

4.75/COP ✘ COP/4.75 ✘ 4.75 x COP ✘ 47.5/COP ✔

Always less than unity ✘ Always greater than unity ✘ Equal to unity ✘ None of the above ✔

Condenser ✘ Compressor ✘ Evaporator ✘ Expansion valve ✔

Condenser ✘ Compressor ✘ Evaporator ✘ Expansion valve ✔

Non-toxic ✘ Non-inflammable ✘ Toxic and Non-inflammable ✘ Highly toxic and inflammable ✔