Absorption system normally uses the following refrigerant___________________?

Related Mcqs:

1. Refrigeration in aeroplanes usually employs the following refrigerant___________________?

   A. Co2
   B. Freon-11
   C. Freon-22
   D. Air
   E. none of the above

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

   A. condenser
   B. evaporator
   C. absorber
   D. condenser and absorber
   E. condenser, absorber and separator (rectifier)

3. Which of the following cycles uses air as the refrigerant__________________?

   A. Ericsson
   B. Stirling
   C. Carnot
   D. Bell-coleman
   E. none of the above

4. Domestic refrigerator working on vapour compression cycle uses the following type of expansion device____________________?

   A. electrically operated throttling valve
   B. manually operated valve
   C. thermostatic valve
   D. capillary tube
   E. expansion valve.

5. The domestic refrigerator uses following type of compressor ____________________?

   A. centrifugal
   B. axial
   C. miniature sealed unit
   D. piston type reciprocating
   E. none of the above

6. 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

7. 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

8. The COP of a vapor compression plant in comparison to vapor absorption plant is ________________?

   A. more
   B. less
   C. same
   D. more/less depending on size of plant
   E. unpredictable

9. 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

10. 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