Grease coatings on electrical contact surfaces increase contact resistance and should be removed with a/an ().
- Asmall wire brush
- Bcompressed air jet
- Cclean dry cloth
- D10% solution carbon solvent and water
Grease coatings on electrical contact surfaces increase contact resistance and should be removed with a/an ().
1、Before doing maintenance on electrical
Before doing maintenance on electrical equipment, you should ().Aturn off power firstBturn on power firstCwith a test pen in handDtell C/E
间接接触电击(indirect contact)
3、Electrical leads and insulation on a m
Electrical leads and insulation on a motor should be painted with().Aheat-resisting acrylicBheat-resisting aluminumCinsulating varnishDinsulating white lead
4、The backup system on an electric start
The backup system on an electric start survival craft is a().Ahydraulic systemBpneumatic systemCspare batteryDhand crank
接触抑制(contact inhibition)
直接接触电击(direct contact)