Practice Test: Question Set - 03
1. Presence of aromatics in
- (A) Diesel increases its cetane number
- (B) Kerosene increases its smoke point
- (C) Petrol increases its octane number
- (D) All (a), (b) and (c)
2. The best method of determining sulphur in crude oil is by the __________ method.
- (A) Kjeldahl
- (B) Dumas
- (C) Bomb calorimeter
- (D) Junkers calorimeter
3. Which of the following is the most widely used cracking process in oil refineries?
- (A) Dubbs process
- (B) T.C.C. moving bed process
- (C) Fluidised bed catalytic cracking process
- (D) Houdry's fixed bed process
4. Which of the following reactions is undesirable in the production of catalytically reformed gasoline?
- (A) Dehydrogenation of Naphthene
- (B) Dehydrogenation of lower paraffins
- (C) Dehydrocyclization of higher paraffins
- (D) Isomerization of paraffins
5. Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil
- (A) Gives higher yield of petrol
- (B) Lower octane number of petrol
- (C) Higher sulphur content in the product
- (D) Higher gum forming material in petrol
6. Pick out the wrong statement.
- (A) A pale color of petroleum product indicates lower viscosity
- (B) Color of petroleum products indicates the degree of refinement
- (C) Lighter petroleum distillates are lighter in color than the heavier
residual oils
- (D) Fluorescence of oils helps to detect its adulteration
7. 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
8. Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of
- (A) Thermal cracking
- (B) Gum formation
- (C) Coking
- (D) Discoloration
9. Octane number of gasoline produced by two stage fluidized catalytic cracking process is
- (A) 80
- (B) 87
- (C) 92
- (D) 97
10. Reforming converts
- (A) Olefins into paraffins
- (B) Naphthenes into aromatics
- (C) Naphthenes into olefins
- (D) Naphthenes into paraffin
11. Feedstock for polymerization is
- (A) Naphtha
- (B) Cracked gases rich in C2 & C4 olefins
- (C) Low boiling aromatics
- (D) None of these
12. Which of the following has the minimum °API gravity of all?
- (A) Diesel
- (B) Kerosene
- (C) Petrol
- (D) Furnace oil
13. Olefins are
- (A) Saturated hydrocarbons
- (B) Unsaturated cyclic compounds (hydrocarbons)
- (C) Present in substantially good quantity in crude petroleum
- (D) None of these
14. Natural gas recovered along with crude oil from oil wells is called wet natural gas which has a higher __________ compared to the dry natural gas.
- (A) Unsaturated hydrocarbon content
- (B) Calorific value
- (C) Quantity of propane
- (D) Quantity of butane
15. Which of the following processes is used for the production of petroleum coke?
- (A) Stabilization
- (B) Visbreaking
- (C) Cracking
- (D) Reforming
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