COMBUSTION
Quiz
•
Physics
•
8th Grade
•
Practice Problem
•
Easy
MUHAMMAD SALIM
Used 1+ times
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20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why does a matchstick not catch fire on its own at room temperature?
It does not have enough oxygen
temperature is below the ignition temperature
It lacks fuel
It is a non-combustible material
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following factors will extinguish a fire?
Adding more oxygen
Increasing the temperature of the fuel above its ignition temperature
Removing oxygen from the fire's surroundings
Increasing the amount of fuel
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What makes kerosene oil more flammable than wood?
Kerosene has a higher vapor pressure than wood
Kerosene is a gas, while wood is a solid
Kerosene requires less heat to ignite
Wood can only ignite in dry conditions
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary mechanism by which carbon dioxide extinguishes flames?
It cools the fire by absorbing heat
It displaces oxygen in the air surrounding the fire
It chemically alters the fuel to prevent combustion
It increases the concentration of flammable gases
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A piece of paper burns easily, but paper wrapped around an iron rod does not. Why?
The paper in contact with the iron rod does not reach its ignition temperature
The iron rod absorbs oxygen from the paper
The iron rod prevents the paper from producing flames
The paper becomes non-combustible when near the iron rod
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which part of a flame is typically the coolest?
The dark zone
The luminous zone
The non-luminous zone
The outermost zone
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why are safety matches safer than earlier versions of matches?
They use white phosphorus, which ignites easily
They contain powdered glass, which acts as a fuel
They do not require friction to ignite
They only ignite when struck on a specific surface
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