Fuel And Combustion

Question 1

What is the process by which fuel is converted into heat energy through a chemical reaction?

Answer 1

Combustion

Question 2

True or False: Combustion is an exothermic reaction.

Answer 2

True

Question 3

What is the primary purpose of combustion in engines?

Answer 3

To generate power

Question 4

What are the three essential components needed for combustion to occur?

Answer 4

Fuel, oxygen, heat

Question 5

What type of fuel is commonly used in internal combustion engines?

Answer 5

Gasoline

Question 6

Fill in the blank: Combustion is a _____ reaction that releases energy.

Answer 6

Chemical

Question 7

What is the unit of measurement for energy content in fuel?

Answer 7

BTU (British Thermal Unit)

Question 8

What is the minimum temperature at which a fuel spontaneously ignites in air called?

Answer 8

Autoignition temperature

Question 9

What are the products of complete combustion of hydrocarbons?

Answer 9

Carbon dioxide and water

Question 10

In a stoichiometric combustion process, what is the ideal ratio of fuel to oxygen for complete combustion?

Answer 10

1:14.7

Question 11

What is the term for the visible flame produced by combustion of gases?

Answer 11

Flame

Question 12

What is the process of mixing fuel with air before combustion called?

Answer 12

Air-fuel ratio

Question 13

What is the device used to ignite the fuel-air mixture in an engine called?

Answer 13

Spark plug

Question 14

What is the primary purpose of a combustion chamber in an engine?

Answer 14

To contain the combustion process

Question 15

What is the term for the unburned fuel that escapes combustion?

Answer 15

Incomplete combustion

Question 16

What is the chemical symbol for oxygen?

Answer 16

O2

Question 17

What is the process of converting fuel into mechanical energy without combustion called?

Answer 17

Electrochemical conversion

Question 18

What is the term for the ratio of the mass of air to the mass of fuel in a combustion process?

Answer 18

Air-fuel ratio

Question 19

What is the device that controls the air-fuel mixture in an engine called?

Answer 19

Carburetor

Question 20

What is the term for the ignition of the fuel-air mixture before the spark plug fires?

Answer 20

Pre-ignition

Question 21

What is the process of reducing the temperature in an engine to prevent knocking?

Answer 21

Cooling

Question 22

What is the term for the rapid, uncontrolled combustion of fuel in an engine?

Answer 22

Knocking

Question 23

What is the primary purpose of a fuel injector in an engine?

Answer 23

To deliver fuel into the combustion chamber

Question 24

What is the term for the resistance of fuel to ignition under pressure?

Answer 24

Octane rating

Question 25

What is the chemical symbol for gasoline?

Answer 25

C8H18

Question 26

What is the term for the process of converting fuel into heat energy through a controlled combustion process?

Answer 26

Thermal efficiency

Question 27

What is the primary purpose of a fuel pump in an engine?

Answer 27

To deliver fuel from the tank to the engine

Question 28

What is the term for the ignition of the fuel-air mixture due to high temperatures in the combustion chamber?

Answer 28

Detonation

Question 29

What is the primary purpose of a fuel filter in an engine?

Answer 29

To remove impurities from the fuel

Question 30

What is the term for the process of converting fuel into mechanical energy through combustion?

Answer 30

Thermal efficiency

Question 31

What is the primary purpose of a turbocharger in an engine?

Answer 31

To increase the power output by compressing air

Question 32

What is the term for the process of reducing the temperature of the air-fuel mixture in an engine?

Answer 32

Intercooling

Question 33

What is the primary purpose of a fuel pressure regulator in an engine?

Answer 33

To maintain consistent fuel pressure

Question 34

What is the term for the process of converting fuel into heat energy through an exothermic reaction?

Answer 34

Combustion

Question 35

What is the primary purpose of a fuel rail in an engine?

Answer 35

To deliver fuel to the injectors

Question 36

What is the term for the process of converting fuel into mechanical energy through controlled combustion?

Answer 36

Thermal efficiency

Question 37

What is the primary purpose of a wastegate in a turbocharged engine?

Answer 37

To regulate boost pressure

Question 38

What is the term for the process of reducing the temperature of the air entering an engine?

Answer 38

Intercooling

Question 39

What is the primary purpose of a fuel pressure gauge in an engine?

Answer 39

To monitor fuel pressure

Question 40

What is the term for the process of converting fuel into heat energy through combustion?

Answer 40

Thermal efficiency

Question 41

What is the primary purpose of a fuel tank in an engine?

Answer 41

To store fuel for the engine

Question 42

What is the primary purpose of a wastegate actuator in a turbocharged engine?

Answer 42

To control the wastegate

Question 43

What is the primary purpose of a fuel pressure sensor in an engine?

Answer 43

To measure fuel pressure

Question 44

What is the primary purpose of a fuel line in an engine?

Answer 44

To transport fuel from the tank to the engine

Question 45

What is the primary purpose of a wastegate spring in a turbocharged engine?

Answer 45

To control the wastegate opening pressure

Question 46

What is the primary purpose of a fuel pressure relief valve in an engine?

Answer 46

To regulate fuel pressure

Question 47

What is the primary purpose of a fuel pump relay in an engine?

Answer 47

To control the fuel pump operation