The commonly used gaseous coolants in refrigeration are:
A. Ammonia, Sulphur dioxide, Carbon dioxide and Hydrogen
B. Nitrogen, Nitrogen dioxide, Carbon dioxide and Freon
C. Ammonia, Sulphur dioxide, Carbon dioxide and Freon
D. Nitrogen, Sulphur dioxide, Nitrogen dioxide and Hydrogen
Answer:C
The commonly used gaseous coolants in refrigeration are:
A. Ammonia, Sulphur dioxide, Carbon dioxide and Hydrogen B. Nitrogen, Nitrogen dioxide, Carbon dioxide and Freon C. Ammonia, Sulphur dioxide, Carbon dioxide and Freon D. Nitrogen, Sulphur dioxide, Nitrogen dioxide and Hydrogen