Hydrogen percentage (by weight) in crude petroleum may be about 5 15 25 35

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Question
Hydrogen percentage (by weight) in crude petroleum may be about
Options
A. 5
B. 15
C. 25
D. 35

Correct Answer

15

More questions

1. Water is entering a storage tank at a temperature T₀ and flow rate Q₀ and leaving at a flow rate Q and temperature T. There are negligible heat losses in the tank. The area of cross-section of the tank is A₀. The model that describes the dynamic variation of temperature of water in the tank with time is given as :
Options
A. Q₀(T₀ - T) = A_c .
B. Q₀T₀ - QT = A_c .
C. Q(T₀ - T) = A_c .
D. Q(T₀ - T) = A_c .

2. An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.
Options
A. resistance
B. arc
C. low frequency induction
D. none of these

3. Pick out the wrong statement.
Options
A. Aromatics have higher specific gravity than paraffins,
B. Gross calorific value (GCV) of petrofuels is equal to (12400 - 2100 ?²) where, ? is the specific gravity of the fuel at 15.5°C.
C. Heavier petrofuels have higher GCV on weight basis (i.e., Kcal/kg) but lower GCV on volume basis (i.e., Kcal/litre).
D. Higher specific gravity of petrofuels means higher C/H ratio.

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