Correct Answer:
(D)
Petroleum
The petroleum products are subject to natural fuel. They are made from the fossils buried within the earth. Other options coke and tar can be achieved by destructive distillation of coal or wood, while coal gas can be created artificially.
Ques: 2
Which of the following fossil fuels is the cleanest fuel ?
Correct Answer:
(C) Natural gas
The use of natural gas in power generation provides a cleaner alternative to coal and other fossil fuels, reducing carbon and other emissions and resulting in both immediate and long-term benefits for public health and the environment.
Ques: 3
Which of the following is a fossil fuel?
Correct Answer:
(D)
Natural gas
Fossil fuels, including coal, oil and natural gas are currently the world’s primary energy sources. The fossil fuels formed from the organic material over the course of millions of years have fuelled the global economy over the past century. Yet the fossil fuels are finite resources and they can also irreparably harm the environment.
Ques: 4
Which one of the following has the highest fuel value ?
Correct Answer:
(A) Hydrogen
The heating value of a fuel is the amount of heat that is obtained after one gram (1gm) of fuel is burnt completely in air or oxygen. Hydrogen has the highest heating value among all fuels. Hydrogen is used as a rocket fuel and in burner producing high temperature. The fuel value of hydrogen gas is 150, charcoal 33, natural gas 50-55 and gasoline 45. Hydrogen gas was first artificially produced in the early 16th century. Henry Cavendish was the first to recognize that hydrogen gas was a discrete substance.
Ques: 5
Cetane number is used as a quality parameter mainly for which of the following?
Correct Answer:
(C) Diesel
As the octane number is used to measure the ignition stability of gasoline (petrol), the cetane number is used as a quality parameter of diesel. The combustion of diesel without spark is provided by compression. Thus, as soon as the diesel fuel is ignited and compressed the cetane number will be higher. This identifies the good quality of diesel.
Ques: 6
The fuel used in a diesel engine :
Correct Answer:
(A) Vapour of diesel and air
A diesel engine is an internal combustion engine in which ignition in fuel is generated by using heat produced by compressing air in closed place. There is no carbureter in diesel engines for combustion as in petrol engines. In a diesel engine, the air inside a cylinder is compressed to such a level so that the temperature of air reaches 80°F and this temperature works as combustion in diesel engines.