Questions And CORRECT Answers
One square meeting of heating surface is equal to - CORRECT ANSWERS 10 kW
What are the four factors that influence natural circulation - CORRECT ANSWERS 1. Height of the
steam drum above the bottoms drum
2. Amount of heat applied to the tubes
3. Operating pressure of the boiler
4. Cleanse leanness of the tubes
What is the economizer - CORRECT ANSWERS Heats the feed water using combustion gases
leaving the boiler
What is the critical pressure - CORRECT ANSWERS 22,090 K PA
What is the main advantage of for circulation boilers - CORRECT ANSWERS Positive flow in all the
tubes
What is the flow through a once through boiler - CORRECT ANSWERS Feed water in, economizer,
radiant evaporator, final evaporator, convection super heater, radiant super heater, steam outlet
steam flooded boilers are designed to produce steam between what dryness - CORRECT
ANSWERS 75 to 80%
According to the Kraft process, pulping is - CORRECT ANSWERS Using a digester, wood chips cook
in white liquor
, According to the Kraft process, washing is - CORRECT ANSWERS Washing out white liquor and
chips it becomes black liquor
According to the Kraft process, what happens in the evaporation stage - CORRECT ANSWERS Uses
heat to create strong black liquor
According to the Kraft process, what happens in the combustion stage - CORRECT ANSWERS Burns
organic material and the non-combustible (smelt) dissolves in a weak chemical to form green liquor
According to the Kraft process, what is the causticizing stage - CORRECT ANSWERS Caustic
chemicals are added to create white liquor
What are the five stages of the kraft process - CORRECT ANSWERS 1. Pulping
2. Washing
3. Evaporation
4. Combustion
5. Causticizing
In a recovery boiler what is the lower furnace - CORRECT ANSWERS The reducing zone
In a recovery boiler what is the middle furnace - CORRECT ANSWERS The drying zone
In a recovery boiler what is the upper furnace - CORRECT ANSWERS Combustion completion zone
What is a recovery boiler used to produce - CORRECT ANSWERS Black liquor
What will happen if water contacts molten smelt - CORRECT ANSWERS It will explode