2728. Traces of tar fog present in the coke oven gas is removed by
Cyclone separator
Wet packed scrubber
Electrostatic precipitator
Washing with monoethanolamine
✅ The correct answer is option C.
2733. Diesel index is defined as
(°API) x (Aniline Point, °F)/100
(°API) x (Aniline Point, °C)/100
(°API) x (100)/Aniline Point, °F
(°API) x (100)/Aniline Point, °C
✅ The correct answer is option A.
2736. Cannel coal
Is non-coking
Has a high volatile matter content and burns with a luminous smoky flame
Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named
All of the above
✅ The correct answer is option D.
2741. Petroleum is believed to have originated from __________ sources.
vegetable
animal
both (a) and (b)
neither (a) nor (b)
✅ The correct answer is option C.
2746. Which of the following constituents of a fuel does not contribute to its calorific value on combustion?
Hydrogen
Sulphur
Carbon
None of these
✅ The correct answer is option D.
2751. Very __________ coals are completely devoid of cokability i.e, it is non coking.
Young
Mature
Both A & B
Neither A nor B
✅ The correct answer is option C.
2756. The coking process normally mostly used in Indian oil refineries is the __________ coking process.
delayed
flexi
fluid
contact
✅ The correct answer is option A.
2761. Gray-King Assay and Roga Index of coal is a measure of its
Abradability
Grindability
Weathering properties
Caking and swelling properties
✅ The correct answer is option D.
2766. Catalyst used in the catalytic cracking is
silica-alumina
silica gel
vanadium pentoxide
nickel
✅ The correct answer is option A.
2771. As time passes, the calorific value of stored coal
Decreases
Increases
Remains unaltered
May increase or decrease (depends on the method of storage)
✅ The correct answer is option A.