41) The value of COP in a vapour compression cycle is usually

42) At lower temperature and pressure, latent heat of vapourisation of a refrigerant

43) Aqua Ammonia is used as refrigerant in the following type of refrigeration system

44) Mass flow ratio of Ammonia in comparision to Freon-12 for same refrigeration load and same temperature limits of the order of

45) The length of a certain conductor of resistance 100 Ohms is doubled and its cross-sectional area is halved. Its new resistance is