A. Presence of unsaturated air
B. Fluctuation of ambient temperature during day and night
C. Both A. and B.
D. Neither A. nor B.
Related Mcqs:
- Gasoline extracted from natural gas (by compression and cooling) is called the ___________ gasoline?
A. Polymer
B. Unleaded
C. Casing head
D. Straight run - Gum formation in stored gasoline is mainly due to the ____________________?
A. Alkylation of unsaturated
B. Presence of sulphur
C. Oxidation & polymerisation of unsaturated
D. Higher aromatic content - Which of the following does not require preheating during storage in the storage tank as well as during atomisation through burners ?
A. PCM
B. Tar
C. Light diesel oil
D. Low viscosity furnace oil - Which of the following is desirable in diesel and kerosene but is undesirable in gasoline ?
A. Aromatics
B. Mercaptans
C. Paraffins
D. Naphthenic acid - Gasoline yield in catalytic reforming of naphtha may be about _________________ percent by weight?
A. 85
B. 65
C. 50
D. 98 - Phenols are added in gasoline to____________________?
A. Improve the octane number
B. Act as an antioxidant
C. Reduce its viscosity
D. Increase its pour point - Which of the following gasoline (unleaded) has the least octane number ?
A. Catalytically cracked gasoline
B. Straight run gasoline
C. Catalytically reformed gasoline
D. Polymer gasoline - Which of the following is desirable in petrol (gasoline) but undesirable in kerosene ?
A. Paraffins
B. Aromatics
C. Mercaptans
D. Naphthenic acid - Octane number of gasoline produced by two stage fluidised catalytic cracking process is___________________?
A. 80
B. 87
C. 92
D. 97 - Reid vapour pressure of gasoline is the measure of its_________________?
A. Pour point
B. Cloud point
C. Vapour locking tendency
D. Carbon residue
