Questions and answers for exam Preparation

MCQs

Total Questions : 150 | Page 4 of 15 pages

Question 31. What is the biomass decomposed to in a bubbly fluidized bed?

Producer gas
Char and gas products with a low tar percentage
Char and gas products with a high tar percentage
Char with a low tar percentage

Discuss Question

Answer: Option B. -> Char and gas products with a low tar percentage
Answer: (b).Char and gas products with a low tar percentage

Question 32. What are the two main units in a circulating fluidized bed?

Bubbling fluidized bed and dual fluidized bed
Bubbling fluidized bed and gasifier unit
Circulating unit and gasifier unit
Circulating unit and dual fluidized bed

Discuss Question

Answer: Option C. -> Circulating unit and gasifier unit
Answer: (c).Circulating unit and gasifier unit

Question 33. The two separate fluidized beds in a dual fluidized bed gasifier are used for pyrolysis and combustion process.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option A. -> True
Answer: (a).True

Question 34. Which of the following best indicates the process in a dual fluidized bed gasifier?

Combustion reactor → pyrolysis reactor
Pyrolysis reactor → combustion reactor
Evaporation reactor → condensation reactor
Combustion reactor → condensation reactor

Discuss Question

Answer: Option B. -> Pyrolysis reactor → combustion reactor
Answer: (b).Pyrolysis reactor → combustion reactor

Question 35. Where can the ash and hot gas be separated in a circulating fluidized bed gasifier?

Gasifier unit
Circulation unit
Tornado separator
Cyclone separator

Discuss Question

Answer: Option D. -> Cyclone separator
Answer: (d).Cyclone separator

Question 36. What is water-gas shift reaction?

Carbon dioxide + water → Carbon monoxide + Hydrogen + small heat
Carbon monoxide + water → Carbon dioxide + Hydrogen + small heat
Carbon dioxide + water + heat → Carbon monoxide + Hydrogen
Carbon monoxide + water + heat → Carbon dioxide + Hydrogen

Discuss Question

Answer: Option B. -> Carbon monoxide + water → Carbon dioxide + Hydrogen + small heat
Answer: (b).Carbon monoxide + water → Carbon dioxide + Hydrogen + small heat

Question 37. Which of the following is a product of biomass gasification?

Hydrogen
Steel
Carbon (solid)
Iron

Discuss Question

Answer: Option A. -> Hydrogen
Answer: (a).Hydrogen

Question 38. What are the three main types of gasifiers?

Fixed bed, hydrothermal liquefaction and carbonisation
Fixed bed, fluidized gasifiers and carbonisation
Carbonisation, liquefaction and entrained flow gasifiers
Fixed bed, fluidized gasifiers and entrained flow gasifiers

Discuss Question

Answer: Option D. -> Fixed bed, fluidized gasifiers and entrained flow gasifiers
Answer: (d).Fixed bed, fluidized gasifiers and entrained flow gasifiers

Question 39. Biomass is moved at a very slow rate in fixed bed gasifier.