⟩ Tell me the categories of transmission media?
☛ Guided Media:
1: Twisted - Pair cable
a: Shielded TP
b: Unshielded TP
2: Coaxial Cable
3: Fiber-optic cable
☛ Unguided Media:
1: Terrestrial microwave
2: Satellite Communication
☛ Guided Media:
1: Twisted - Pair cable
a: Shielded TP
b: Unshielded TP
2: Coaxial Cable
3: Fiber-optic cable
☛ Unguided Media:
1: Terrestrial microwave
2: Satellite Communication
Heat is generated in a nuclear reactor (thermal) by A. combustion of a nuclear fuel e.g. uranium. B. fusion of atoms of uranium. C. absorption of neutrons in uranium atoms. D. fission of U-235 by neutrons.?
Which of the following tests is not done for transformer oil? A. Flash point and acid value. B. Aniline point. C. Dielectric strength. D. Copper strip corrosion test.
Diesel used in naval applications has a minimum cetane number of A. 25 B. 35 C. 45 D. 65
Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene. A. Smoking tendency of hydrocarbons increases in the order paraffins → isoparaffins → naphthenes → aromatics. B. Smoking tendency of paraffin's increases with decrease in its molecular weight. C. Smoking tendency of naphthenes decreases with its increasing molecular weight & also on addition of double bond. D. Smoking tendency of aromatics decreases with increase in its molecular weight.
Which is the most undesirable component in kerosene? A. Aromatics B. i-paraffins C. n-paraffins D. Naphthenes
Hydrogen percentage (by weight) in crude petroleum may be about A. 5 B. 15 C. 25 D. 35
Which of the following constituents present in petroleum is responsible for ash formation? A. Nitrogen compounds B. Organometallic compounds C. Sulphur compounds D. Oxygen compounds
The coking process normally mostly used in Indian oil refineries is the __________ coking process. A. delayed B. flexi C. fluid D. contact
Stabilisation of gasoline (petrol) means A. removal of dissolved gases from it. B. increasing its oxidation stability. C. improving its lead susceptibility. D. increasing its vapour pressure.
In petroleum refining, the process used for conversion of hydrocarbons to aromatics is A. catalytic cracking B. catalytic reforming C. hydrotreating D. alkylation