Fuel Efficiency

Author:NCERT
8th CBSE
IMPORTANT

Important Questions on Fuel Efficiency

MEDIUM
IMPORTANT
NCERT Exemplar Science - Class 8>Combustion and Flame>Fuel Efficiency> Q 1

 The calorific values of petrol and CNG are 45000 kJ/kg and 50,000 kJ/kg, respectively. If you have vehicle which can run on petrol as well as CNG, which fuel will you prefer and why?

MEDIUM
IMPORTANT
NCERT Exemplar Science - Class 8>Combustion and Flame>Fuel Efficiency> Q 2

What do you understand by fuel efficiency?

EASY
IMPORTANT
NCERT Exemplar Science - Class 8>Combustion and Flame>Fuel Efficiency> Q 3

Greater the calorific value, better is the fuel.

EASY
IMPORTANT
NCERT Exemplar Science - Class 8>Combustion and Flame>Fuel Efficiency> Q 4

The amount of heat energy produced on complete combustion of 1kg of a fuel is called its _____.

MEDIUM
IMPORTANT
NCERT Exemplar Science - Class 8>Combustion and Flame>Fuel Efficiency> Q 5

Calorific value of wood is higher than that of coal.

EASY
IMPORTANT
NCERT Exemplar Science - Class 8>Combustion and Flame>Fuel Efficiency> Q 6

The calorific value of a fuel is expressed in a unit called

HARD
IMPORTANT
NCERT Exemplar Science - Class 8>Combustion and Flame>Fuel Efficiency> Q 7

Which one of the following has the highest calorific value?