The general formula of paraffins is
A.CnH2n
B.CnH2n-2
C.CnH2n+2
D.CnH2n+1
Category: Petroleum Refining Engineering Mcqs
At sea level atmospheric pressure and room temperature
A.methane through butane occur as liquids
B.pentane and heavier hydrocarbons occur as liquids
C.ethane and heavier hydrocarbons occur as liquids
D.propane and heavier hydrocarbons occur as liquids
Which of the following compounds can improve the cetane number of diesel oils when added in small quantities?
A.Ethyl mercaptan
B.Amyl nitrate
C.Methyl tertiary butyl ether
D.Tetra ethyl lead
Select the correct order of increasing effect of TEL on octane number
A.Olefins aromatics naphthenes paraffins
B.Aromatics naphthenes olefins paraffins
C.Paraffins naphthenes aromatics olefins
D.Paraffins olefins naphthenes armatics
Which of the following petroleum products has maximum C/H ratio (by weight)?
A.Naphtha
B.Kerosine
C.Light diesel oil
D.Fuel oil
The operation of reactors used in the catalytic reforming of naphtha is favoured at
A.low pressure and low temperature
B.high pressure and high temperature
C.low pressure and high temperature
D.high pressure and low temperature
Cetane number is an important test for
A.gasoline
B.kerosine
C.High speed diesel oil
D.Fuel oil
Aniline point of an oil is the lowest temperature at which the oil is completely miscible with an equal volume of aniline. High aniline point indicates that the fuel
A.is highly paraffinic
B.has a low diesel
C.has a very poor ignition quality
D.is highly armatic
Octane number of paraffins
A.remains constant with change in number of carbon atoms
B.increases with increase in number of carbon atoms
C.decreases with increase in number of carbon atoms
D.none of the above
LPG at normal atmospheric temperature and pressure is a
A.liquid which is heavier than water
B.gas which is heavier than air
C.fas which is lighter than air
D.liquid which is lighter than water
