In S.J. unit, one ton of refrigeration is equal to___________________?

Related Mcqs:

1. 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

2. The general rule for rating refrigeration systems (excepting for C02 system) is to approximate following h.p. per ton of refrigeration__________________?

   A. 0.1 to 0.5 h.p. per ton of refrigeration
   B. 0.5 to 0.8 h.p. per ton of refrigeration
   C. 1 to 2 h.p. per ton of refrigeration
   D. 2 to 5 h.p. per ton of refrigeration
   E. 5 to 10 h.p. per ton refrigeration

3. One ton of the refrigeration is_________________?

   A. the standard unit used in refrigeration problems
   B. the cooling effect produced by melting 1 ton of ice
   C. the refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours
   D. the refrigeration effect to produce 1 ton of ice at NTP conditions
   E. the refrigeration effect to produce 1 ton of ice in 1 hour time

4. One ton refrigeratiqn corresponds to_________________?

   A. 50 kcal/min
   B. 50 kcal/kr
   C. 80 kcal/min
   D. 80 kcal/hr
   E. 1000 kcal/day

5. Vapor compression refrigeration is some what like ____________________?

   A. Carnot cycle
   B. Rankine cycle
   C. reversed Camot cycle
   D. reversed Rankine cycle
   E. none of the above

6. Refrigeration in aeroplanes usually employs the following refrigerant___________________?

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

7. 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

8. The leaks in a refrigeration system using Freon are detected by____________________?

   A. halide torch which on detection produces greenish flame lighting
   B. sulphur sticks which on detection gives white smoke
   C. using reagents
   D. smelling
   E. sensing reduction in pressure

9. The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is_________________?

   A. same
   B. more
   C. less
   D. more or less depending on ambient conditions
   E. unpredictable

10. For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then_________________?

    A. bigger cabinet should be used
    B. smaller cabinet should be used
    C. perfectly tight vapour seal should be used
    D. refrigerant with lower evaporation temperature should be used
    E. refrigerant with high boiling point must be used