The sliding window is an abstract concept that defines the range of sequence numbers that is the concern of the sender and receiver. In other words, he sender and receiver need to deal with only part of the possible sequence numbers.
For gasoline, the flash point (<50°C) is determined by the A. Abel apparatus. B. Pensky-Marten's apparatus. C. Saybolt chromometer. D. none of these.
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.
The colour of gasoline is an indication of its A. octane number. B. lead susceptibility. C. gum forming tendency & thoroughness of refining. D. none of these.
__________ converts n-paraffins to i-paraffins. A. Alkylation B. Polymerisation C. Isomerisation D. none of these
In the atmospheric pressure crude distillation, the content of __________ from lighter fraction to heavier ones. A. sulphur increases B. sulphur decreases C. nitrogen decreases D. none of these
Catalytic desulphurisation process used for sweetening of straight run gasoline and kerosene uses __________ as catalyst. A. bauxite B. fuller's earth C. activated clay D. all (a), (b) & (c)
True boiling point apparatus is used for the A. determination of characterisation factor. B. evaluation of oil stocks. C. determination of true vapour pressure. D. none of these.
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)
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