What is the effect on the performance of the economiser in the thermal power plant boiler, if the feed water temperature is very low due to preheaters being out for repairs or starving of steam supply ?
A. It results in corrosion due to the condensation on the flue gas side of the economiser tubes due to handling of low temperature water
B. Economiser tube life increases due to handling of low temperature water
C. Heat transfer efficiency of economiser increases due to picking up high heat from the flue gases
D. Scale formation rate on economiser tubes increases
Answer: Option A
This Question Belongs to Chemical Engineering >> Chemical Engineering Basics
Which of the following will resist maxi-mum shock & vibration without cracking?
A. Grey cast iron
B. White cast iron
C. Malleable iron
D. Graphite
A. Pulverised fuel
B. Travelling grate stoker firing
C. Circulating fluidised bed
D. Fluidised bed
Isotropic materials have the same __________ in all directions.
A. Induced stresses
B. Density
C. Elastic properties
D. Thermal properties
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