Ammonia is

A. Non-toxic

B. Non-inflammable

C. Toxic and non-inflammable

D. Highly toxic and inflammable

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
  2. The process, generally used in summer air conditioning to cool and dehumidify the air, is called
  3. The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents
  4. The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed…
  5. The ratio of heat extracted in the refrigerator to the work-done on the refrigerant is called
  6. The air cooling system mostly used in transport type aircrafts is
  7. Which of the following cycles uses air as the refrigerant?
  8. For air conditioning the operation theatre in a hospital, the percentage of outside air in the air supplied…
  9. Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption…
  10. Pick up the wrong statement. A refrigerant should have
  11. A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250…
  12. The horizontal and non-uniformly spaced lines on a psychrometric chart indicates
  13. The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature…
  14. Aqua ammonia is used as refrigerant in the following type of refrigeration system
  15. Air refrigerator works on
  16. The boiling point of ammonia is
  17. In order to collect liquid refrigerant and to prevent it from going to a ________, a device known as…
  18. The condensing pressure due to the presence of non-condensable gases, as compared to that actually required…
  19. The boiling point of carbon dioxide is
  20. In a reversed Brayton cycle, the heat is absorbed by the air during
  21. Chaperon equation is applicable for registration at
  22. During humidification process, __________ increases.
  23. Most of the domestic refrigerators work on the following refrigeration system
  24. Choose the correct statement
  25. A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing…
  26. The dry bulb temperature during sensible heating of air
  27. The C.O.P. of a Carnot refrigerator in winter will be _________ as compared to C.O.P. in summer.
  28. On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line…
  29. For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet…
  30. A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine…