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Beehive coke oven
A Facilitates by-products recovery
B Takes 2-3 days for coking of coal but requires no external fuel for heating
C Gives larger yield of coke (around 85%) as compared to by-product ovens
D Produces coke with very poor strength
Beehive coke ovens are made of __________ bricks.
A Silica
B Fireclay
C Silicon carbide
D Corundum
Width of the coke oven towards coke side is slightly more than that on pusher side to
A Facilitate easy discharging of coke as it swells during carbonisation
B Facilitate uniform heating of the oven
C Increase the output of the coke
D None of these
Prime coking coal is always blended with medium or non- coking coal before ear-bonisation
A To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls
B Because, it alone produces unreactive coke
C Both A & B
D Neither A nor B
The coking process normally mostly used in Indian oil refineries is the __________ coking process.
A Delayed
B Flexi
C Fluid
D Contact
Coking time in narrow by-product coke ovens is around __________ hours.
A 18
B 48
C 8
D 80
Which is the most ideal feed stock for 'coking' process used for the manufacture of petroleum coke?
A Naphtha
B Vacuum residue
C Light gas oil
D Diesel
A cake is put in the oven at 7.20 am. If the cake takes three quarters of an hour to bake, at what time should it be taken out of the oven ?
A 8:10 a.m.
B 8:05 a.m.
C 8:15 a.m.
D 7:50 a.m.
By-products are __________ recovered in 'Beehive ovens'.
A Fully
B Partially
C Not at all
D Negligibly
Naphthalene is removed from coke oven gas by
A Adsorbing on palladium
B Absorbing in ethanolamine
C Scrubbing with wash oil
D Passing it through electrostatic precipitator

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