Chemical Engineering MCQs

Page No. 534

Cetane number of alpha methyl naphthalene is assumed to be_________________?


a0

✓


b100

✖


c50

✖


d∞

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View Answer 0

Which of the following is desirable in diesel and kerosene but is undesirable in gasoline ?


aAromatics

✓


bMercaptans

✖


cParaffins

✖


dNaphthenic acid

✖


View Answer Aromatics

Flash point of diesel/kerosene (>50°C) is determined by the_______________?


aAbel apparatus

✓


bPensky-Martens apparatus

✖


cSaybolt chromometer

✖


dNone of these

✖


View Answer Abel apparatus

Naphthenic acid is a/an ______________ compound?


aSulphur

✖


bNitrogen

✖


cOxygen

✓


dNone of these

✖


View Answer Oxygen

LPG when brought to atmospheric pressure & temperature will be a________________?


aLiquid lighter than water

✖


bLiquid heavier than water

✖


cGas lighter than air

✖


dGas heavier than air

✓


View Answer Gas heavier than air

Gum formation in stored gasoline is mainly due to the ____________________?


aAlkylation of unsaturated

✖


bPresence of sulphur

✓


cOxidation & polymerisation of unsaturated

✖


dHigher aromatic content

✖


View Answer Presence of sulphur

Smoke point of a good burning kerosene may be around _______________ mm?


a0-5

✖


b20-25

✓


c60-75

✖


d100-120

✖


View Answer 20-25

Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl isobutyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the____________________?


aElimination of solvent drying facility

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bHigher nitration temperature

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cLower solvent dilution ratio

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dAll A., B. & C.

✓


View Answer All A., B. & C.

Which of the following has the highest flash point of all ?


aDiesel

✖


bKerosene

✖


cPetrol

✖


dFurnace oil

✓


View Answer Furnace oil

Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about _______________ °C ?


a50

✖


b70

✖


c90

✓


d140

✖


View Answer 90

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