Questions and answers for exam Preparation

MCQs

Total Questions : 150 | Page 15 of 15 pages

Question 141. Which of the following is produced apart from acetates in acetogenesis step in anaerobic digestion?

Carbon monoxide
Charcoal
Carbon dioxide
Acetone

Discuss Question

Answer: Option C. -> Carbon dioxide
Answer: (c).Carbon dioxide

Question 142. What are the two ways to produce methane in methanogenesis step?

Converting carbon monoxide and carbon dioxide into methane
Converting carbon monoxide and acetic acid (or acetate) into methane
Converting methane into carbon monoxide and carbon dioxide
Converting carbon dioxide and acetic acid (or acetate) into methane

Discuss Question

Answer: Option D. -> Converting carbon dioxide and acetic acid (or acetate) into methane
Answer: (d).Converting carbon dioxide and acetic acid (or acetate) into methane

Question 143. Methanogens can directly use the products of hydrolysis to produce methane.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option B. -> False
Answer: (b).False

Question 144. Gases emitted from the digester indicates the amount of biomass left to be broken down.

True
False
May be True or False
Can't say

Discuss Question

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

Question 145. What are the two main products of anaerobic digestion?

Carbon monoxide and hydrogen
Methane and carbon dioxide
Methane and carbon monoxide
Hydrogen and carbon dioxide

Discuss Question

Answer: Option B. -> Methane and carbon dioxide
Answer: (b).Methane and carbon dioxide

Question 146. Which of the following are characterizes an ideal energy crop?

High yield, high energy input to produce, high cost and high nutrient requirements
High yield, low energy input to produce, low cost and low nutrient requirements
High yield, high energy input to produce, low cost and high nutrient requirements
Low yield, high energy input to produce, high cost and high nutrient requirements

Discuss Question

Answer: Option B. -> High yield, low energy input to produce, low cost and low nutrient requirements
Answer: (b).High yield, low energy input to produce, low cost and low nutrient requirements

Question 147. The heating value is expressed in BTU/kg.

True
False
May be True or False
Can't say

Discuss Question

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

Question 148. Which energy forms can biomass be converted to?

Electrical and light
Light and chemical
Electrical and heat
Heat and light

Discuss Question

Answer: Option C. -> Electrical and heat
Answer: (c).Electrical and heat

Question 149. What does heat value indicate?

Amount of energy consumed by biomass to produce energy
Amount of energy required to process biomass to produce energy
Amount of energy required as heat by the organisms
Amount of energy that is available in the fuel

Discuss Question

Answer: Option D. -> Amount of energy that is available in the fuel
Answer: (d).Amount of energy that is available in the fuel

Question 150. What is higher heating value?

Amount of energy available in the fuel + energy contained in water vapour in the exhaust gases
Total amount of energy available in the fuel – energy contained in water vapour in the exhaust gases
Total amount of energy available in the fuel * energy contained in water vapour in the exhaust gases
Total amount of energy available in the fuel

Discuss Question

Answer: Option A. -> Amount of energy available in the fuel + energy contained in water vapour in the exhaust gases
Answer: (a).Amount of energy available in the fuel + energy contained in water vapour in the exhaust gases