$1-63$ Electricity is mostly produced from

the world.

$($a$)$ Coal

$($b$)$ Natural gas

$($c$)$ Oil

$($d$)$ Nuclear

$($e$)$ Solar

$1-64$ The most common use of petroleum products is in

$($a$)$ Motor vehicles

$($b$)$ Electricity generation

$($c$)$ Space heating

$($d$)$ Steam generation

$($e$)$ Industrial furnaces

$1-65$ Which fuel is the most polluting fuel and the largest contributor to

global $C{O}_2$ emissions?

$($a$)$ Coal

$($b$)$ Natural gas

$($c$)$ Oil

$($d$)$ Nuclear

$($e$)$ Solar

$1-66$ Which fuel has the highest heating value?

$($a$)$ Coal

$($b$)$ Natural gas

$($c$)$ Oil

$($d$)$ Hydrogen

$($e$)$ Sulfur

$1-67$ Desirable characteristics of coal are

$($a$)$ High sulfur content, high heating value

$($b$)$ High sulfur content, low heating value

$($c$)$ Low sulfur content, high heating value

$($d$)$ Low sulfur content, low heating value

$1-68$ Order the following fuels from higher values of heating value to lower

values.

I. Coal

II$.$ Gasoline

III. Natural gas

$($a$)$ I, II$,$ III

$($b$)$ I, III, II

$($c$)$ II$,$ I, III

$($d$)$ II III, I

$($e$)$ III, II$,$ I

$1-69$ In order to accommodate the inconsistent supply of renewable elec$-$

tricity, a more flexible electrical grid system than the existing conventional

system is required. This is called

$($a$)$ Smart grid

$($b$)$ Flexible electricity

$($c$)$ Consistent grid supply

$($d$)$ Intelligent transmission

$($e$)$ None of these

$1-70$ The total amount of heat input to a coal$-$burning power plant is $5000$

GJ$.$ The heating value of coal is $25,000k\frac{J}{k}g.$ The amount of coal consumed

per year is

$($a$)5000$ ton

$($b$)500$ ton

$($c$)200$ ton

$($d$)200,000$ ton

$($e$)25,000$ ton