1.a) Explosive concerns with compressed natural gas used in vehicles are almost non-existent - why ? b) Refinery gases are dried in the first step of LPG preparation - why? c) What is wild gasoline ? Why it has to be stabilized? d) The length of the flare indicates the health of the refinery - comment. e) What is steam tracing ? Where and why is it needed? f) Refinery tube-still heaters are operated under balanced draft mode - why ? g) What are the temperature and pressure specifications in the electrostatic desalting of crude oil and why ? h) The furnace stack-top temperature is never allowed to fall below the dewpoint of the flue gas - why? i) Corrosion in atmospheric distillation unit is mainly observed in the overhead section, why and what is the remedy? j) Catalytic reformer unit cannot be a fluidized-bed reactor - why? 102