⟩ Flash point of atmospheric distillation residue is determined by __________ apparates. A. Pensky-Martens (closed cup type). B. Abel. C. Cleveland (open cup type) D. none of these.
Option C
Option C
Salt content (measured as sodium chloride) in electrically desalted crude oil comes down to a level of about __________ ptb (pounds per thousand barrel). A. 0.03 B. 3 C. 35 D. 70
Clay treatment is used to remove A. salt from the crude oil. B. colour & dissolved gases from cracked gasoline. C. wax from lube oil. D. none of these.
Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is A. more than 100 B. round about 100 C. between 50 and 100 D. less than 25
Pressure & temperature maintained in catalytic cracking is about A. 2atm & 500°C B. 10atm & 500°C C. 30atm & 200°C D. 50atm. & 750°C
Pick out the wrong statement. A. Pensky-Marten apparatus is used for determining flash points above 50°C. B. Characterisation factor of paraffinic crude oil is more than 12. C. Abel apparatus is used for determining flash points below 50°C. D. An oil having high susceptibility to change in viscosity with temperature changes, has a high viscosity index.
Water separometer index (modified) (WSIM) of a petrofuel is the measure of its A. emulsification tendency. B. water separation characteristics. C. water content. D. water absorbing capacity from atmosphere.
Highest quality bitumen is produced from the __________ crude oil. A. paraffinic B. naphthenic C. intermediate D. mixed
Char value of Kerosene is the amount of charred oil deposition on the wick obtained after burning it in a standard wick lamp at a standard rate for 24 hours. Char value of a good quality kerosene should be less than __________ mg/kg of kerosene. A. 1 B. 20 C. 100 D. 500
Ethyl mercaptan is a/an __________ compound. A. sulphur B. nitrogen C. oxygen D. none of these
Which of the following has the lowest cetane number? A. Aromatics B. i-paraffins C. Naphthene D. Olefins E. n-paraffins