The protocol specifies that frames need to be numbered. This is done by using sequence numbers. A field is added to the data frame to hold the sequence number of that frame. Since we want to minimize the frame size, the smallest range that provides unambiguous communication. The sequence numbers can wrap around.
Flash point of motor gasoline may be around __________ °C. A. 10 B. 45 C. 100 D. 150
__________ test is done to find out the softening point of bitumen. A. Impact B. Ball and ring C. Flame D. Viscosity
Mercaptans are A. low boiling sulphur compounds. B. added in LPG cylinders to detect gas leakage by its smell. C. undesirable in petrol, as they reduce its octane number. D. all (a), (b) and (c)
Furfural solvent extraction is used for upgrading (by dissolving aromatics) A. naphtha B. lubricating oils C. wax D. cracking feedstock
Tanks used for the storage of petroleum products (which are inflammable) should be painted with a __________ paint. A. black B. white C. red D. yellow
Which of the following has the lowest viscosity (at a given temperature) of all? A. Naphtha B. Kerosene C. Diesel D. Lube oil
Solution used in Doctor's treatment for the removal of mercaptans is A. sodium hydroxide B. sodium plumbite C. cupric chloride D. potassium isobutyrate
__________ determination is not a very significant and important test for gasoline. A. Gum & sulphur content B. Viscosity C. Octane number D. Reid vapor pressure
Catalyst used in catalytic reforming is A. platinum on alumina B. nickel C. iron D. aluminium chloride
Octane number of gasoline is a measure of its A. resistance to knock. B. ignition delay. C. ignition temperature. D. smoke point.
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