Hotel Service Unit 15 Q2 Quiz

Correct Answer:
A) The temperature required to ignite without an external ignition source

Explanation:
The auto-ignition temperature is the minimum temperature at which a substance ignites on its own without any flame or spark, often due to high ambient temperatures or pressures.

Correct Answer:
B) The temperature at which a vapor produces enough fumes to ignite momentarily with an external ignition source

Explanation:
The flash point is the lowest temperature at which a substance emits vapors that can ignite with an external ignition source, such as a spark or flame.

Correct Answer:
A) Heating cooking oil in an open pan

Explanation:
As cooking oil reaches its flash point, vapors can ignite if exposed to an open flame or spark, leading to a flash fire in the kitchen.

Correct Answer:
B) Ignition that occurs without an external ignition source, due to internal chemical reactions generating heat

Explanation:
Spontaneous combustion occurs when materials self-heat due to internal chemical or biological reactions, reaching ignition without an external source, such as in oily rags that oxidize over time.

Correct Answer:
A) Oil accumulating on a hot engine block

Explanation:
If oil reaches its auto-ignition temperature on a hot engine block, it could ignite without any external flame or spark, potentially causing a fire.

Correct Answer:
A) Leaving oily rags piled in a closed area

Explanation:
Oily rags can self-heat through oxidation, and when piled together with limited ventilation, they can reach a temperature that causes spontaneous combustion.