單項選擇題Halon extinguishers used on a class C fire should be directed at the（）.

A.base of the equipment
B.top of the equipment
C.power source
D.source of the fire


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題Good housekeeping on a vessel prevents fires by（）.

A.allowing better access in an emergency
B.eliminating potential fuel sources
C.eliminating trip hazards
D.improving personnel qualifications

2.單項選擇題Generally，the first action in extinguishing an LFG fire caused by escaping gas is to（）.

A.sweep flames away with water spray
B.shut off the leak
C.use a chemical foam fire extinguisher
D.call the local fire department

3.單項選擇題Gas masks（）.

A.should be worn while fighting a fire
B.can be used in atmospheres deficient in oxygen
C.filter contaminants from air that is to be breathed
D.may be substituted for a self-contained breathing apparatus

4.單項選擇題Fusible-link fire dampers are operated by（）.

A.8the heat of a fire melting the link
B.a break-glass and pull-cable system
C.electrical controls on the bridge
D.a mechanical arm outside the vent duct

5.單項選擇題Foam-type portable fire extinguishers are most useful in combating fires involving（）.

A.solid materials such as wood or bales of fiber
B.inflammable liquids
C.electrical equipment
D.metallic solids