Fire Science And Fire Behavior

2.

An addition to the fire triangle. It adds the requirement for the presence of the chemical reaction which is the process of fire.

fire tetrahedron
exothermic reaction
Combustion
Exothermic
Endothermic

Correct Answer

A. fire tetrahedron

Explanation

The fire tetrahedron is a concept that expands on the fire triangle by adding the requirement for the presence of a chemical reaction. It recognizes that fire is not simply a result of fuel, heat, and oxygen, but also involves the process of combustion, which is an exothermic reaction. This means that fire releases energy in the form of heat and light. The fire tetrahedron helps to provide a more comprehensive understanding of the factors involved in fire and the importance of chemical reactions in sustaining it.

Rate this question:

1

3.

The sequence of exothermic chemical reactions between a fuel and an oxidant accompanied by the production of heat and conversion of chemical species.

Oxidizer
Chain reaction
Combustion
Radiation
Conduction

Correct Answer

A. Combustion

Explanation

Combustion refers to a series of exothermic chemical reactions that occur between a fuel and an oxidant, resulting in the production of heat and the conversion of chemical species. It is a process where the fuel reacts with the oxidant, releasing energy in the form of heat and light. This reaction is often accompanied by a chain reaction, where the heat generated from the initial reaction further sustains and propagates the combustion process. Combustion is different from radiation and conduction, as it specifically involves the chemical reactions between fuel and oxidant.

Rate this question:

4.

Describes a process or reaction that absorbs energy in the form of heat

Exothermic
Endothermic
Ecothermic
enthalpy
convection

Correct Answer

A. Endothermic

Explanation

Endothermic describes a process or reaction that absorbs energy in the form of heat. This means that during the reaction, heat is taken in from the surroundings, resulting in a decrease in the temperature of the surroundings. This is opposite to exothermic reactions, where heat is released into the surroundings. The term "ecothermic" is not a valid scientific term, and "enthalpy" refers to the total heat content of a system. "Convection" refers to the transfer of heat through the movement of fluids.

Rate this question:

5.

The process of energy transfer from one body or system due to thermal contact, which in turn is defined as an energy transfer to a body in any other way than due to work performed on the body

Temperature
Convection
Conduction
Radiation
Heat

Correct Answer

A. Heat

Explanation

Heat is the transfer of energy from one body or system to another due to thermal contact. It is different from work, as it does not involve mechanical forces. Heat can be transferred through three main mechanisms: conduction, convection, and radiation. Conduction is the transfer of heat through direct contact between particles or molecules. Convection is the transfer of heat through the movement of fluids or gases. Radiation is the transfer of heat through electromagnetic waves. Temperature, on the other hand, is a measure of the average kinetic energy of particles in a substance.

Rate this question:

6.

What is the percent of oxygen that sustaines life here on earth

35%
21%
18%
14%
7%

Correct Answer

A. 21%

Explanation

The correct answer is 21%. Oxygen is essential for sustaining life on Earth. It makes up approximately 21% of the Earth's atmosphere. This concentration allows for the necessary oxygen levels to support the respiration process in living organisms, including humans.

Rate this question:

7.

Heat that is tranfered by the movement of molecules within fluids (i.e. liquids, gases and rheids).

Radiant
Convection
Conduction
Combustion
Oxidation

Correct Answer

A. Convection

Explanation

Convection is the correct answer because it refers to the transfer of heat through the movement of molecules within fluids. In convection, heat is transferred as the molecules in the fluid gain energy, become less dense, and rise, while cooler, denser molecules sink. This movement of molecules creates a continuous circulation of heat within the fluid, effectively transferring heat from one place to another.

Rate this question:

8.

heat emitted from the surface of an object which is due to the object's temperature is what type of heat?

Thermal
Radiant
Convection
Conduction
Combustion

Correct Answer

A. Radiant

Explanation

Radiant heat is the correct answer because it refers to the heat that is emitted from the surface of an object due to its temperature. It is a form of heat transfer that occurs through electromagnetic waves, such as infrared radiation. This type of heat can be felt as warmth when standing near a hot object or when exposed to sunlight.

Rate this question:

9.

The chemical decomposition of condensed substances by heating, that occurs spontaneously at high enough temperatures

Combustion
Conduction
Gas pressure
Pyrolysis
Oxidation

Correct Answer

A. Pyrolysis

Explanation

Pyrolysis refers to the chemical decomposition of condensed substances by heating, which occurs spontaneously at high temperatures. This process involves the breakdown of complex molecules into simpler ones due to the application of heat, without the presence of oxygen. It is different from combustion, which involves the rapid reaction of a substance with oxygen to produce heat and light. Conduction refers to the transfer of heat through direct contact, while gas pressure refers to the force exerted by gas molecules on the walls of their container. Oxidation involves the reaction of a substance with oxygen.

Rate this question:

10.

Is a traditional unit of energy. It is approximately the amount of energy needed to heat one pound of water one degree Fahrenheit.

BTU
International System of Units (SI)
Mass
Ectoplasma
Weight

Correct Answer

A. BTU

Explanation

A BTU (British Thermal Unit) is a traditional unit of energy commonly used in the United States. It represents the amount of energy required to raise the temperature of one pound of water by one degree Fahrenheit. This unit is often used to measure the heating and cooling capacity of appliances such as furnaces and air conditioners. The International System of Units (SI) does not include the BTU as an official unit, but it is still widely used in certain industries and regions. Mass, weight, and ectoplasma are unrelated to the concept of BTU.

Rate this question:

1

Fire Science And Fire Behavior

What describes a process or reaction that releases energy usually in the form of heat, but also in the form of light (e.g. a spark, flame, or explosion), electricity (e.g. a battery), or sound?

Quiz Preview

An addition to the fire triangle. It adds the requirement for the presence of the chemical reaction which is the process of fire.

The sequence of exothermic chemical reactions between a fuel and an oxidant accompanied by the production of heat and conversion of chemical species.

Describes a process or reaction that absorbs energy in the form of heat

The process of energy transfer from one body or system due to thermal contact, which in turn is defined as an energy transfer to a body in any other way than due to work performed on the body

What is the percent of oxygen that sustaines life here on earth

Heat that is tranfered by the movement of molecules within fluids (i.e. liquids, gases and rheids).

heat emitted from the surface of an object which is due to the object's temperature is what type of heat?

The chemical decomposition of condensed substances by heating, that occurs spontaneously at high enough temperatures

Is a traditional unit of energy. It is approximately the amount of energy needed to heat one pound of water one degree Fahrenheit.