Refrigerants commonly used for domestic refrigerators are_________________?

Related Mcqs:

1. In jet refrigerators, the refrigerating fluid is practically always_________________?

   A. Water
   B. Ammonia
   C. Freon
   D. Brine

2. For a single component two phase mixture, the number of independent variable properties are_________________?

   A. Two
   B. One
   C. Zero
   D. Three

3. A domestic refrigerator has a/an ____________ cooled condenser?

   A. Water
   B. Air
   C. Evaporative
   D. Gas

4. The Carnot co-efficient of performance (COP) of a domestic air conditioner compared to a household refrigerator is__________________?

   A. Less
   B. More
   C. Same
   D. Dependent on climatic conditions

5. Domestic refrigerator usually works on the _____________ refrigeration cycle?

   A. Carnot
   B. Air
   C. Absorption
   D. vapour-ejection

6. Fresh domestic sewage is _______________ in color?

   A. Grey
   B. Dark brown
   C. Red
   D. Black

7. The most commonly used moderator in nuclear power plants is__________________?

   A. Graphite
   B. Light water
   C. Heavy water
   D. Beryllium

8. The most commonly used chemical coagulant in water treatment is________________?

   A. Ferrous sulphate
   B. Alum
   C. Lime
   D. Hydrazine

9. In sewage treatment, its sedimentation is speeded up by commonly adding__________________?

   A. Hydrochloric acid
   B. Lime
   C. Copper sulphate
   D. Sodium sulphate

10. Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in___________________?

    A. Food industry
    B. Municipal sewage treatment
    C. Petroleum refinery
    D. Iron & steel plant