Quiz No. 4 - Topic 6 and 7

Manual materials handling is always hazardous but the level of hazard depends on what you are handling, what the task is, and what the conditions are at the workplace or work site.

• Correct

• Wrong

• Perhaps

• No comment

It is a chemical reaction between a flammable or combustible materials and oxygen. This process converts those materials and the latter into energy.

• fire

• electricity

• fuel

• lightning

A ______ is any material that can be made to react with other substances so that it releases energy as heat energy or to be used for work. The two categories are flammable and combustible substances.

• oxygen

• ignition

• fuel

• fire

It is a substance having a flashpoint below 100 °F (37.8 °C) and vapor pressure not exceeding 20 psia at 100 °F.

• combustible substance

• flammable substance

• pure substances

• chemical substances

LPG tank flame at the nozzle of the valve is best extinguished by shutting off the valve.

This extinguishing method is for removing _____.

• fuel

• oxygen

• heat

• chain reaction

After cooking barbeque we normally put off the charcoal using water applied directly to the flame. We actually are removing the _____ in the fire tetrahedron.

• fuel

• oxygen

• heat

• chain reaction

By using dry chemical to extinguish a fire, you are actually interrupting the ____.

• fuel

• oxygen

• heat

• chain reaction

If there are oil spills, you can cover it with wet blanket or you can throw sand or soil on it. This is called "suffocating the fire" or removing _____.

• fuel

• oxygen

• heat

• chain reaction

Class C fires involves

• energized electrical wiring or equipment (motors, computers, panel boxes)

• combustible metals such as magnesium, sodium, titanium, and certain organometallic compounds such as alkyl lithium and Grignard reagents.

• materials that, when they burn, leave a residue in the form of ash, such as paper, wood, cloth, rubber, and certain plastics.

• flammable liquids and gasses, such as gasoline, paint thinner, kitchen grease, propane, and acetylene.

Class A fires involves

• energized electrical wiring or equipment (motors, computers, panel boxes)

• combustible metals such as magnesium, sodium, titanium, and certain organometallic compounds such as alkyl lithium and Grignard reagents.

• materials that, when they burn, leave a residue in the form of ash, such as paper, wood, cloth, rubber, and certain plastics.

• flammable liquids and gasses, such as gasoline, paint thinner, kitchen grease, propane, and acetylene.