Coke is produced

A When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel
B From the finely ground coal by moulding under pressure with or without a binding material
C When coal is first dried and then crushed to a fine powder by pulverizing machine
D By heating wood with a limited supply of air to a temperature not less than 280°C

Correct Answer: When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel

Bissoy MCQ
#Mechanical Engineering #Engineering Thermodynamics

Related Questions

Degree of carbonisation of coal during coke making can be roughly judged by the __________ of the coke produced.
A Colour
B Moisture content
C Ash content
D Volatile matter
In a group of 60 people, 27 like coke and 42 like borhani and each person likes at least one of the two drinks How many people like both coke and borhani?
A 9
B 129
C 69
D 15
Coke made in narrower by-product coke ovens (as compared to wider ovens) is
A Less reactive
B Stronger
C Smaller in size
D All of the above
During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.
A Density
B Porosity
C Electrical resistivity
D None of these
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
Narrow coke ovens as compared to wider coke ovens
A Produce smaller coke
B Produce stronger coke
C Require less time of carbonisation
D All of the above
Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has
A Higher calorific value
B Lower hydrogen content
C Both A & B
D Neither A nor B
Quantity of coke produced from metallurgical coal may be around __________ percent.
A 30
B 50
C 75
D 95
Petroleum coke is commercially produced by the __________ process.
A Hydrocracking
B Visbreaking
C Fluid catalytic cracking
D Delayed coking
Coke is produced by
A Pulverizing coal in inert atmosphere
B Heating wood in a limited supply of air at temperatures below 300°C
C Strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
D Enriching carbon in the coal

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