A.undercutting
B.sanding
C.burnishing
D.filing
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A.reduce current pulsations
B.reduce brush chatter
C.prevent uneven commutator wear
D.allow greater power generation
A.varying the DC exciter voltage
B.varying the reluctance of the air gap
C.regulating the speed of the prime mover
D.shorting out part of the armature windings
A.a rheostat
B.a balancing coil
C.changing field excitation
D.adjusting the governor settings
A.32~5 amps
B.25 amps
C.1~5 amps
D.30 amps
A.the rudder angle indicator reading
B.the desired rudder angle reading
C.the measured rudder angle reading
D.the intended rudder angle reading
最新試題
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
Diesel engine air start system check valves are opened by （）
（） is not installed on the main switchboar.
The ISPS Code consists of a mandatory section-Part A, which shows（）
The shipboard oil pollution emergency plan will be invalid after （）
The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.
The condensers located in various stages of a flash evaporator are cooled by（）