Paraffins
Diolefins
Aromatics
Naphthenes
✅ The correct answer is option B.
Chemical Engineering MCQs
Optimum preheating temperature for pitch creosote mixture (PCM) which is also termed as C.T.F-200, before atomisation through burners is
200 °F
200 °C
200 °K
200 °R
✅ The correct answer is option A.
The catalytic cracking of heavier petroleum fraction is done to produce mainly
gasoline
asphalt
diesel oil
tar
✅ The correct answer is option C.
Molecular weight of crude oil is in the range of
100-120
230-250
450-550
600-850
✅ The correct answer is option B.
Octane number of 2, 2, 4 – trimethyl pen-tane is
0
100
In between 0 and 100
More than 100
✅ The correct answer is option B.
Yield of charcoal in high temperature carbonisation of wood is about __________ percent.
10
25
50
75
✅ The correct answer is option B.
Testing of the knocking characteristics of petrofuels is done in a __________ engine.
Carnot
CFR (Co-operative fuel research)
Stirling
diesel
✅ The correct answer is option B.
Which of the following constituents present in petroleum is responsible for ash formation?
Nitrogen compounds
Organometallic compounds
Sulphur compounds
Oxygen compounds
✅ The correct answer is option C.
Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature?
Calorific value of the fuel
Flame temperature achieved
Speed of combustion of fuel
Heat transfer rate to the stock in the furnace
✅ The correct answer is option A.
In petroleum refining, the process used for conversion of hydrocarbons to aromatics is
catalytic cracking
catalytic reforming
hydrotreating
alkylation
✅ The correct answer is option B.