Testing of the knocking characteristics of petrofuels is done in a _________________ engine ?

A. Smoking tendency of hydrocarbons increases in the order: paraffins → isoparaffins →
naphthenes → aromatics
B. Smoking tendency of paraffins increases with decrease in its molecular weight
C. Smoking tendency of naphthenes decreases with its increasing molecular weight & also on
addition of double bond
D. Smoking tendency of aromatics decreases with increase in its molecular weight

A. Dubbs process
B. T.C.C. moving bed process
C. Fluidised bed catalytic cracking process
D. Houdry’s fixed bed process

A. pH of the soil
B. Bacterial action
C. Heat
D. Pressure

A. Sulphur & its compounds
B. Water
C. Organic impurities
D. Wax

A. PCM
B. Tar
C. Light diesel oil
D. Low viscosity furnace oil

A. 50
B. 250
C. 1500
D. 5000