Chemical Engineering Mcqs

Quantity of coke produced from metallurgical coal may be around _____________ percent?

• (A)  30
• (B)  50
• (C)  75
• (D)  95

Answer

Submitted By :Ali Uppal

The liquid used for the washing of coal in an industrial coal washery is a mixture of water and ____________________?

• (A)  Carbon tetrachloride
• (B)  Sand (40%)
• (C)  Mineral oil of high viscosity & specific gravity (1.6)
• (D)  None of these

Answer

Submitted By :Ali Uppal

Which of the following constituents of coal is the most important in the production of coke ?

• (A)  Moisture
• (B)  Ash
• (C)  Volatiles
• (D)  Carbon

Answer

Submitted By :Ali Uppal

Chrome magnesite bricks are_________________?

• (A)  Acidic in nature
• (B)  Neutral in nature
• (C)  Having higher RUL than silica bricks
• (D)  Made by mixing 30% Chromite and 70% Periclase

Answer

Submitted By :Ali Uppal

Si percentage in silica refractories used in the walls of coke oven is about______________________?

• (A)  45
• (B)  60
• (C)  80
• (D)  95

Answer

Submitted By :Ali Uppal

In chemical process equipments, the conical bottom heads used, usually has an apex angle of____________________?

• (A)  20°
• (B)  40°
• (C)  60°
• (D)  80°

Answer

Submitted By :Ali Uppal

Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about ______________ percent?

• (A)  5
• (B)  20
• (C)  35
• (D)  55

Answer

Submitted By :Ali Uppal

Carbon Content by weight in air dried wood may be about _______________ percent?

• (A)  10
• (B)  25
• (C)  50
• (D)  80

Answer

Submitted By :Ali Uppal

Which of the following has the least calorific value (kcal/Nm3) ?

• (A)  Blast furnace gas
• (B)  Coke oven gas
• (C)  Sewage gas
• (D)  Natural gas

Answer

Submitted By :Ali Uppal

Which of the following gaseous fuels has the lowest calorific value ?

• (A)  Gobar gas
• (B)  Refinery gas
• (C)  Converter gas
• (D)  Blast furnace gas

Answer

Submitted By :Ali Uppal