The four basic components of a fire are fuel, heat, oxygen and a chain reactionWhich of the following statements best describes what must be eliminated to extinguish a fire?（）
1、In the event of a fire, the doors to a
In the event of a fire, the doors to a stair tower must be closed to prevent the spread of fire by （）.AconvectionBconductionCradiationDventilatio
2、To avoid damaging the components of a
To avoid damaging the components of a printed circuit board when testing it with a DC volt-ohmmeter, you should （）Aground the boardBavoid reversing the polarity of the leadsCisolate sensitive components with heat sinksDall of the above
3、If the turbocharger of a four-stroke/c
If the turbocharger of a four-stroke/cycle diesel engine fails to operate, which of the following statements best describes the probable effect?...
4、The spreading of fire as a result of h
The spreading of fire as a result of heat being carried through a vessels ventilation system, is an example of heat transfer by （）.AconductionBconvectionCradiationDwindage
5、The working cycle of a four-stroke di
The working cycle of a four-stroke diesel engine consists of four events:（）(1) compression(2) expansion(3) exhaust(4) suctionThe correct sequence isA(4)-(2)-(3)-(1)B(4)-(3)-(1)-(2)C(4)-(3)-(2)-(1)D(4)-(1)-(2)-(3)
6、The （）is not a component of an oil sep
The （）is not a component of an oil separator.Asliding bowl bottomBgravity discCseparating discDscum valve