⟩ Tell me the minimum and maximum length of the header in the TCP segment and IP datagram?
The header should have a minimum length of 20 bytes and can have a maximum length of 60 bytes.
The header should have a minimum length of 20 bytes and can have a maximum length of 60 bytes.
The solvent used in Barisol dewaxing process is A. hexane B. furfural C. benzol and ethylene dichloride D. methyl ethyl ketone (MEK)
Choose the correct statement regarding thermal cracking. A. Moderate changes in operating temperature does not change the depth of cracking. B. Increased residence time results in the decreased severity of cracking. C. At low pressure, the yield of lighter hydrocarbons are more. D. Greater depth of cracking gives lower octane number gasoline.
A typical yield of diesel in straight run distillation of crude oil may be about __________ percent. A. 8 B. 18 C. 28 D. 35
Diesel index.(an alternative index for expressing the quality of diesel) is A. determined by using a test engine. B. not related to aniline point. C. equal to cetane number plus 3. D. all (a), (b) & (c).
Which is almost absent in crude petroleum? A. Olefins B. Mercaptans C. Naphthenes D. Cycloparaffins
Tetra-ethyl lead is added in gasoline to A. increase its smoke point. B. reduce gum formation. C. reduce the pour point. D. increase its octane number.
Which of the following is an additive used for improving the cetane number of diesel? A. Tetraethyl lead B. Tetramethyllead C. Ethyl nitrate or acetone D. None of these
Flash point of diesel/kerosene (>50°C) is determined by the A. Abel apparatus B. Pensky-Martens apparatus C. Saybolt chromometer D. none of these
Aromatics are desired constituents of A. lubricating oil B. diesel C. kerosene D. petrol
Octane number (unleaded) of gasoline produced by isomerisation of butane may be about A. 45 B. 55 C. 70 D. 90