2786. Operating temperature and pressure in catalytic reforming is about
1-5 Kgf/cm2 & 200°C.
15-45 Kgf/cm2 & 450-550°C.
50 – 75 kgf/cm2 & 600 – 800°C.
5-10 kgf/cm2 & 150 – 250°C.
✅ The correct answer is option B.
2790. The weathering index of a coal
Gives an idea of the fusion temperature of ash
Is related to its calorific value
Is a measure of its size stability, when stored & exposed to weather
Is a measure of its caking tendency
✅ The correct answer is option C.
2795. Optimum preheating temperature for pitch creosote mixture (PCM) which is also termed as C.T.F-200, before atomisation through burners is
200 °F
200 °C
200 °K
200 °R
✅ The correct answer is option A.
2726. Catalyst used in alkylation process is
sulphuric acid
nickel
silica gel
alumina
✅ The correct answer is option A.
2731. Fixed carbon in coal is defined as
That present in volatile matters
The total quantity of carbon present in the coal
Hundred minus the percentage of volatile matter, ash and moisture
The one which is present in the residue after combustion
✅ The correct answer is option C.
2735. Which of the following is called “blue gas”?
Coke oven gas
Water gas
Natural gas
Producer gas
✅ The correct answer is option B.
2739. Gasoline yield in catalytic reforming of naphtha may be about __________ percent by weight.
85
65
50
98
✅ The correct answer is option A.
2744. Coking time in a commercial high temperature coal carbonisation plant is about __________ hours.
6
18
28
36
✅ The correct answer is option B.
2749. Which of the following is the easiest to crack?
Paraffins
Olefins
Naphthenes
Aromatics
✅ The correct answer is option A.
2754. Hard pitch is used for making
Pulverised fuel
Perfumes
Insecticides
Plastics
✅ The correct answer is option A.