Related Questions

Although it can be derived_ oil, coal, and tar kerosene is usually produced_ refining it from petroleum.
ক from/by
খ by/from
গ in/from
ঘ at/for
Coal tar fuels (CTF) as compared to petroleum based fuel oils have higher
ক Calorific value
খ Higher C/H ratio
গ Sulphur content
ঘ Difference in gross & net calorific value
Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about __________ percent.
ক 5
খ 25
গ 55
ঘ 75
After the increase of price of oil by 40%, a family decided to reduce its oil consumption so that the expenditure for oil goes up by 26% only. If the total consumption of oil before the price rise was 10 kg per month, then what is the current consumption of oil per month (in kg)?
ক 8
খ 8.50
গ 9
ঘ None of these
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because
ক Its calorific value is very less
খ Tar neutralises the residual acids present in pitch
গ It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop
ঘ All of the above
In a refinery petroleum crude is fractionated into gas fraction, light ends, intermediate distillates, heavy distillates, residues and by products. The group of products including gas oil, diesel oil and heavy fuel oil belongs to the fraction
ক Heavy distillates
খ Intermediate distillates
গ Light ends
ঘ Residues
The import of crude oil and petroleum done from national oil companies of producer countries, which have a net exportable surplus of oil is by
ক term contracts
খ term tenders
গ monthly tenders
ঘ All the above
Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its
ক Poor oxidation stability and high gum forming tendency
খ Greater tendency of decomposition at elevated temperature
গ Hydrolysis tendency in presence of water
ঘ All of the above
Coal tar (produced by high temperature carbonisation) is the main source of
ক Aromatic compounds
খ Alphatic compounds
গ Paraffins
ঘ Olefins
অপরিশোধিত পেট্রোলিয়াম বিশোধনে যে প্রক্রিয়া অধিক কার্যকর (In refining crude petroleum the more effective operation is)
ক Distillation
খ Steam distillation
গ Sublimation
ঘ Fractional distillation

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