Cengage Expert Team Solutions for Chapter: Sources of Energy, Exercise 2: PERFECTING PAST PRELIMS

Microbial fuel cells are considered as a source of sustainable energy. Why?
1. They use living organisms as catalysts to generate electricity from certain substrates.
2. They use a variety of inorganic materials as substrates.
3. They can be installed in wastewater treatment plants to cleanse water and produce electricity.
Which of the statements given above is/are correct?

Biomass gasification is considered to be one of the sustainable solutions to the power crisis in India. In this context, which of the following statements is/are correct?                                                             

1. Coconut shells, groundnut shells and rice husk can be used in biomass gasification.
2. The combustible gases generated from biomass gasification consist of hydrogen and carbon dioxide only.
3. The combustible gases generated from biomass gasification can be used for direct heat generation but not in internal combustion engines.

Select the correct answer using the codes given below:

Which of the following industries is India's maximum water consumer?  

Which of the following is/are the characteristics/characteristics of Indian coal?
1. High ash content.
2. Low sulfur content.
3. Low ash fusion temperature.
Select the correct answer using the codes given below:

Consider the following statements regarding two non-conventional energy sources called coal bed methane and shale gas: 
1. Coal bed methane is the pure methane gas extracted from coal seams, while shale gas is a mixture of propane and butane that can be extracted from fine-grained sedimentary rocks.
2. In India, abundant coal bed methane sources exist, but no shale gas sources have been found so far.
Which of the statements given above is/are correct?

In India, cluster bean (guar) is traditionally used as a vegetable or animal feed, but recently, the cultivation of this has assumed significance. Which one of the following statements is correct in this context?

With reference to 'fuel cells' in which hydrogen-rich fuel and oxygen are used to generate electricity. Consider the following statements:
$1.$ If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by-products.
$2.$ Fuel cells can be used for powering buildings and not for small devices like laptop computers.
$3.$ Fuel cells produce electricity in the form of Alternating Current (AC).

Which of the statements given above is/are correct?

'Net metering' is sometimes seen in the news in the context of promoting: