Cooling water is required for following equipment in ammonia absorption plant__________________?

Related Mcqs:

1. Allowable pressure on high-pressure side or ammonia absorption system is of the order of_________________?

   A. atmospheric pressure
   B. slightly above atmospheric pressure
   C. 2-4 bars
   D. 5-6 bars
   E. 7-10 bars

2. Ammonia-absorption refrigeration cycle requires__________________?

   A. very little work input
   B. maximum work input
   C. nearly same work input as for vapour compression cycle
   D. zero work input
   E. none of the above

3. The evolution of heat of solution takes place in ammonia absorption plant when _____________________?

   A. ammonia vapour goes into solution
   B. ammonia vapour is driven out of solution
   C. lithium bromide mixes with ammonia
   D. weak solution mixes with strong solution
   E. lithium bromide is driven out of solution

4. Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption system ?

   A. strong solution to weak solution
   B. weak solution to strong solution
   C. strong solution to ammonia vapour
   D. ammonia vapour to weak solution
   E. ammonia vapour to strong solution

5. Aqua ammonia is used as refrigerant in the following type of refrigeration system_________________?

   A. compression
   B. direct
   C. indirect
   D. absorption
   E. none of the above

6. The boiling point of ammonia is___________________?

   A. -100°C
   B. -50°C
   C. – 33.3°C
   D. 0°C
   E. 33.3°C

7. Ammonia is __________________?

   A. non-toxic
   B. non-inflammable
   C. toxic and non-inflammable
   D. highly toxic and inflammable
   E. none of the above

8. Absorption system normally uses the following refrigerant___________________?

   A. Freon-11
   B. Freon-22
   C. C02
   D. S02
   E. ammonia

9. Under-cooling in a refrigeration cycle_________________?

   A. increases COP
   B. decreases COF
   C. COP remains unaltered
   D. other factors decide COP
   E. unperdictable

10. One of the purposes of sub-cooling the liquid refrigerant is to________________?

    A. reduce compressor overheating
    B. reduce compressor discharge temperature
    C. increase cooling effect
    D. ensure that only liquid and not the vapour enters the expansion (throttling) valve
    E. none of the above