Practice Pakistan's most useful MCQs for competitive exams

Power alcohol as compared to straight run gasoline has lower ________________?

• (A)  Calorific value
• (B)  Octane number
• (C)  Specific gravity
• (D)  Viscosity

Answer

Submitted By :Ali Uppal

Which of the following petrographic constituents of coal is non-coking ?

• (A)  Vitrain
• (B)  Clarain
• (C)  Durain
• (D)  Fussain

Answer

Submitted By :Ali Uppal

The reaction, C + CO2 ↔ 2CO, taking place during coal gasification is called the ______________ reaction?

• (A)  Neumann reversal
• (B)  Shift conversion
• (C)  Boudouard
• (D)  Reduction

Answer

Submitted By :Ali Uppal

Presence of phosphorous in metallurgical coal__________________?

• (A)  Is not undesirable
• (B)  Reduces its calorific value
• (C)  Badly affects the quality of steel
• (D)  Increases its caking power

Answer

Submitted By :Ali Uppal

Which is the heaviest fuel gas out of the following ?

• (A)  Blast furnace gas
• (B)  Coke oven gas
• (C)  Water gas
• (D)  Carburetted water gas

Answer

Submitted By :Ali Uppal

The calorific value of producer gas is around _____________ kcal/Nm3?

• (A)  1300
• (B)  500
• (C)  4500
• (D)  9000

Answer

Submitted By :Ali Uppal

Proximate analysis of coal determines its ______________ content?

• (A)  Moisture, ash, sulphur & volatile matter
• (B)  Moisture, volatile matter, ash & fixed carbon
• (C)  Moisture, sulphur, nitrogen & fixed carbon
• (D)  None of these

Answer

Submitted By :Ali Uppal

The maximum percentage of CO2 in a flue gas (from a carbonaceous fuel) can be_________________?

• (A)  21
• (B)  77
• (C)  79
• (D)  29

Answer

Submitted By :Ali Uppal

Yield of pitch from distillation of high temperature tar is around _____________ percent?

• (A)  10
• (B)  25
• (C)  65
• (D)  90

Answer

Submitted By :Ali Uppal

Hardgrove Grindability index of four coal samples are given below. Which of them is the easiest to grind ?

• (A)  50
• (B)  70
• (C)  85
• (D)  100

Answer

Submitted By :Ali Uppal