A、raise lube oil viscosity for easier starting in cold weather
B、increase air inlet temperature
C、increase compression ratio
D、increase jacket water temperature for easier starting in cold weather
更多“An electric heater built into some smaller diesel engines is used to （）.”相关的问题
A、The coolant temperature must be maintained at 180℃ B、The thermostatic bypass valves must be manually opened before the engine is started C、The pressure cap must be removed while the engine is secured D、Electrical power to the heater must be secured before the cooling system is drained
A、prevent the windings from becoming brittle B、prevent moisture from condensing in the windings during shutdown C、prevent acidic pitting of the slip rings D、keep the lube oil warm for quick starting
A、a heater B、a pre-heater C、an exhaust gas boiler D、the coal burning boiler
A、An alternator B、An electric motor C、A diesel engine D、A main switchboard
A、A room thermostat activates an electric heater at each individual chilled air outlet when necessary B、Varying the number of passes the air makes across the coils C、Varying the temperature of the water through the coils D、Varying the quantity of water flowing through the coils
A、in entrance B、in exit C、in the upper part D、on the outside
A、generate its own electrical power B、transform electrical energy into mechanical energy C、increase or decrease circuit voltage as required D、convert AC current to DC current
A、develop torque B、generate high voltages C、produce a magnetic field D、generate high electrical resistance
A、Static electricity B、An open running electric motor C、Loose wiring D、Explosion proof lights
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