A.draw a one line diagram of the circuitry
B.test all fuses and measure the line voltage
C.take megger readings
D.insulate the apparatus from ground
您可能感興趣的試卷
你可能感興趣的試題
A.melts and must be replaced
B.is enclosed in a tube of insulating material with metal ferrules at each end
C.gives no visual indication of having opened the circuit
D.trips to break the circuit and may be reset
A.brushes on a commutator
B.brushes on slip rings
C.slip rings on a commutator
D.direct connections from the stator
A.heat-resisting acrylic
B.heat-resisting aluminum
C.insulating varnish
D.insulating white lead
A.hydrogen chloride
B.calcium chloride
C.sulfuric acid
D.muriatic acid
A.can be reset to energize the circuit
B.should open the circuit when overloaded
C.will burn out when an over current flow develops
D.All of the above
最新試題
The ISPS Code consists of a mandatory section-Part A, which shows()
Which one is NOT the ‘clear grounds’ for a more detailed inspection?()
Flame failure in an automatically fired auxiliary boiler can from a/an ()
Cold weather starting of a diesel engine may be made easier by()
The cetane rating of diesel fuel is an indication of the ()
()are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
When does auxiliary burner of incinerator put into operation? ()Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?()
Diesel engine air start system check valves are opened by ()
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?()