Ammonia-absorption refrigeration cycle requires__________________?

Related Mcqs:

1. A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of- 23°C. The Cannot coefficient of performance of cycle will be_________________?

   A. 0.2
   B. 1.2
   C. 5
   D. 6
   E. 10

2. One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice_________________?

   A. in 1 hour
   B. in 1 minute
   C. in 24 hours
   D. in 12 hours
   E. in 10 hours

3. 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

4. An important characteristic of absorption system of refrigeration is__________________?

   A. noisy operation
   B. quiet operation
   C. cooling below 0°C
   D. very little power consumption
   E. its input only in the form of heating

5. 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

6. 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

7. 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)

8. 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

9. Super heating in a refrigeration cycle __________________?

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

10. The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will__________________?

    A. increase
    B. decrease
    C. may increase or decrease depending on the type of refrigerant used
    D. remain unaffected
    E. unpredictable