When would you ground an electric hand tool?()
- AWhen it is a DC machine
- BWhen it is an AC machine
- CAny machine that operates on over 100 volts
- DOnly when working on wet steel plate
When would you ground an electric hand tool?()
1、If you must make an electricity connec
If you must make an electricity connection in a poorly accessible spot, solder it and seal it against ()AmetalBwoodCwaterDplastic
2、To extinguish an electrical fire, you
To extinguish an electrical fire, you should use ().Amechanical foamBchemical foamCcarbon dioxideDsoda acid
3、In which two cases would you use an ou
In which two cases would you use an outer join? ()A The tables being joined have NOT NULL columns.B The tables being joined have only matc...
When would you want to disable souce-route and icmp on a router of interface?
5、When fighting an electrical fire, you
When fighting an electrical fire, you should first ().Astop ventilation to the areaBstop the vesselCsecure electricity to the circuitDapply CO2 to the fire
6、When securing an AC generator, you sho
When securing an AC generator, you should FIRST ().Aopen the generator circuit breakerBswitch the voltage regulator to manualCdecrease the field excitation to minimumDreduce the load on the unit