০০। "Breathing loss" on storage of gasoline occurs due to the
ক) presence of unsaturated air.
খ) fluctuation of ambient temperature during day and night.
গ) both (a) and (b).
ঘ) neither (a) nor (b).
০১। 'Solvent naphtha' used mostly as a solvent in paints and perfumery is produced by the __________ of virgin naphtha into small boiling range cuts.
ক) steam reforming
খ) distillation
গ) desulphurisation
ঘ) none of these
০২। 1 centistoke is equal to __________ Redwood I seconds.
ক) 1
খ) 4.08
গ) 0.408
ঘ) 40.8
০৩। 95% (by volume) of LPG at 760 mm Hg pressure will evaporate at __________ °C.
ক) 2
খ) -40
গ) 30
ঘ) 55
০৪। A fuel oil consists of 4 fractions A, B, C and D. Their molar compositions and vapour pressures are given below : The vapour pressure of the fuel oil will be __________ mm Hg.
ক) 736
খ) 727.5
গ) 512
ঘ) 767.8
০৫। A good lubricant should have high
ক) viscosity index
খ) volatility
গ) pour point
ঘ) none of these
০৬। A multigrade lubricating oil means an oil having high
ক) viscosity index
খ) viscosity
গ) aniline point
ঘ) flash point
০৭। A petroleum well is called 'dry', if it contains
ক) very little oil.
খ) no natural gas.
গ) only natural gas.
ঘ) all (a), (b) and (c).
০৮। A typical yield of diesel in straight run distillation of crude oil may be about __________ percent.
ক) 8
খ) 18
গ) 28
ঘ) 35
০৯। A typical yield of kerosene in straight run distillation of crude oil may be about __________ percent.
ক) 4
খ) 10
গ) 18
ঘ) 26
১০। Absolute vapor pressure of petrofuels is found by Reid bomb which is heated in water bath to 100°F. In Reid apparatus, the ratio of the volume of air chamber to that of the liquid fuel chamber is
ক) 1
খ) 2
গ) 3
ঘ) 4
১১। Alkylation
ক) causes olefins to combine with each other.
খ) causes olefins to combine with iso-paraffins.
গ) converts iso-paraffin into olefin.
ঘ) converts olefin into paraffin.
১২। An upper limit of oil content is limited to about __________ percent for achieving efficient and satisfactory level of wax sweating.
ক) 5
খ) 15
গ) 40
ঘ) 60
১৩। Aniline point is a property of the
ক) diesel
খ) LPG
গ) naphtha
ঘ) gasoline
১৪। Aniline point is the
ক) characteristic property of diesel & lubricating oils.
খ) measure of aromatic content of oil.
গ) both (a) and (b).
ঘ) neither (a) nor (b).
১৫। Aniline point is the temperature at which
ক) equal weight of diesel & the aniline are completely miscible.
খ) equal weight of aniline & the test sample are completely miscible.
গ) equal volume of aniline & the test sample are completely miscible.
ঘ) aniline vaporises.
১৬। Aniline point of high speed diesel may be about __________ °C.
ক) 35
খ) 70
গ) 105
ঘ) 150
১৭। Aniline point of the diesel is a measure of its __________ content.
ক) aromatic
খ) paraffin
গ) olefin
ঘ) naphthene
১৮। Aniline point test of an oil qualitatively indicates the __________ content of an oil.
