Chemical Engineering Mcqs

Calorific value of tar is about _____________ Kcal/kg?

(A) 8800
(B) 12000
(C) 14000
(D) 16000

Submitted By :Ali Uppal

Orsat apparatus__________________?

(A) Gives flue gas analysis on dry basis
(B) Determines N2 in flue gas indirectly
(C) Can’t determine CO in flue gas, if it is < 0.2%
(D) All

Submitted By :Ali Uppal

Fuel consumption in coke making can be reduced by___________________?

(A) Preheating, blending and de-ashing the coal
(B) Stamped charging of coal
(C) Dry quenching of coke
(D) All

Submitted By :Ali Uppal

The cooling medium used in dry quenching of coke is___________________?

(A) Nitrogen
(B) Air
(C) Phenolic water
(D) Carbon dioxide

Submitted By :Ali Uppal

Which of the following is the most important deterrents to an extended use of pulverised coal in boiler firing ?

(A) Ash disposal problem
(B) Excessive fly-ash discharge from the stack
(C) High power consumption in its transportation
(D) Erosion of induced draft fan blades

Submitted By :Ali Uppal

C/H ratio is the minimum in case of_________________?

(A) Furnace oil
(B) Natural gas
(C) Coal
(D) Naphtha

Submitted By :Ali Uppal

The calorific value of a gas of composition CO2 = 20%, H2 = 50%, CH4 = 30%, is y. If the composition of gas is changed to H2 = 50%, CH4 = 30%, CO2 = 10%, N2 = 10%, then the calorific value will be___________________?

(A) y
(B) 0.95 y
(C) 1.05 y
(D) 1.8 y

Submitted By :Ali Uppal

The gasification reaction represented by, C + H2O = CO + H2, is__________________?

(A) Exothermic
(B) Endothermic
(C) Catalytic
(D) Autocatalytic

Submitted By :Ali Uppal

Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around ______________ Nm3?

(A) 30
(B) 300
(C) 3,000
(D) 30,000

Submitted By :Ali Uppal

For long flame and easy ignition, the coal used should have_________________?

(A) High volatile matter
(B) Low ash
(C) High calorific value
(D) High ash

Submitted By :Ali Uppal

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