FTC 102 CH 8

What is the setting for a typical pressure relief valve on a propane tank?

2000 kPa

The key condition for boilover in an open container of a combustible material is the presence of two immiscible layers. Which of the following conditions make up those layers?

An upper layer of a low-density combustible liquid and a lower layer of a higher-density combustible liquid.

What hazard is associated with a pressurized container being heated?

BLEVE (Boiling Liquid Expanding Vapor Explosion)

Liquids are divided into classes based upon their flash point. Which of the following liquid classifications have a flash point below 100 °F (38 °C)?

Class I

Liquids are divided into classes based upon their flash point. Which of the following liquid classifications have a flash point at or above 100 °F (38 °C) but below 140 °F (60 °C)?

Class II

Liquids are divided into classes based upon their flash point. Which of the following liquid classifications have a flash point at or above 140 °F (60 °C)?

Class III

When a material is heated 10 °F to 30 °F (5 °C to 15 °C) higher than the flash point, and the ignition flame is applied from time to time, combustion is sustained after removal of the ignition source. This temperature is called the:

Fire Point

Which of the following materials has the lowest flashpoint?

Gasoline

Which of the following materials has the highest flashpoint?

JP-5

Which of the following terms is used to express the rate of burning of a liquid pool and is shown in mm/s?

Linear burning rate

The total heat release rate for a pool of a combustible liquid is the rate of heat release per unit area multiplied by the:

Surface area of the pool.

Define fire point:

Temperature at which sufficient vapors are being generated to sustain the combustion process.

How does elevation affect the lower flammability limit?

The higher the elevation, the lower the vapor pressure required to achieve the lower flammability limit.

Define flash point of a liquid combustible:

The minimum temperature at which a liquid must be heated so that a transient flame moves over the liquid when a small pilot flame is applied.

What is liquid burning rate?

The rate of burning of a liquid pool.