The key elements of protocols are:
☛ Syntax:
It refers to the structure or format of the data, that is the order in which they are presented.
☛ Semantics:
It refers to the meaning of each section of bits.
☛ Timing:
Timing refers to two characteristics: When data should be sent and how fast they can be sent.
Viscosity index of a lubricating oil A. is the measure of its flash point. B. is the measure of variation of viscosity with temperature. C. should be low. D. none of these.
Smoke point of a test sample of kerosene is found to be 15 mm. On removal of __________ from it, the smoke point rises to 25 mm. A. n-paraffins B. olefins C. aromatics D. none of these
__________ is not an important refinery process for upgrading the quality of lubricating oil. A. Deoiling B. Solvent refinning C. Clay treatment D. Hydrotreatment
Pick out the undesirable property for a solvent meant for dewaxing of lube oil. A. Complete miscibility with oil. B. High solubility of wax in the solvent. C. Both (a) and (b). D. Neither (a) nor (b).
Which of the following is used as a catalyst in fluidised bed catalytic cracking? A. Silica-magnesia B. Silica-alumina C. Bentonite clays D. All (a), (b) and (c)
Casing head gasoline is the liquid A. butane. B. propane. C. natural gas. D. gasoline separated from wet natural gas by compression.
Most commonly used crude heater before the fractionation tower in a refinery is the __________ heater. A. electric immersion B. pipestill C. steam coil D. none of these
Pour point and freezing point is equal for A. petrol B. diesel C. water D. crude petroleum
Maximum sulphur percentage in low sulphur heavy stock (LSHS) furnace oil is about A. 0.1 B. 1 C. 2.5 D. 3.5
Which of the following fractions of a crude oil will have the maximum gravity API (i.e. °API)? A. Diesel B. Gasoline C. Atmospheric gas oil D. Vacuum gas oil
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