更多"The purging of air from an elector-"的相关试题:
[单项选择]Purging air from a hydraulic system is necessary when()
A. adding small amounts of oil to the system
B. the system has been overheated
C. the system has been drained and then filled with new oil
D. the system has been idle for a long period of time
[单项选择]The process of removing moisture from air is known as().
A. humidification
B. dehumidification
C. vaporization
D. evaporation
[单项选择]The engine is started with () supplied from air receivers.
A. pressure oil
B. pressure water
C. compressed air
D. cooling water
[单项选择]Air blowing from the intake air filter of an operating air compressor indicates ().
A. broken inlet valves
B. broken discharge valves
C. pulsations in the air distribution system
D. overloading of the air distribution system
[单项选择]() device is provided to prevent starting air from being admitted to the cylinder before the reversing is completed.
A. An automatic
B. A transmission
C. A self-regulating
D. An interlocking
[单项选择]The loss of () from an air compressor could lead to an overheated air discharge and possibly an explosion in the pipelines leading to the air reservoir.
A. lubricating oil
B. compressed air
C. cooling water
D. sealing ring
[单项选择]A knocking sound emitted from an unloaded air compressor is probably caused by ().
A. damaged intake valves
B. excessively tight mounting bolts
C. insufficient cylinder lubrication
D. a loose piston
[单项选择]Intake air flow from a diesel engine turbocharger is directly proportional to engine()
A. exhaust gas pressure
B. exhaust gas temperature
C. speed
D. load
[单项选择]In order to properly remove air from the casing of a centrifugal pump when starting, the pump should have a ().
A. positive head
B. negative suction head
C. mechanical seal
D. vent valve attached to the casing at the top of the volute
[单项选择]The air required for combustion is taken from the engine room through a filter fitted on the turbochargerThis reduces the risk for too and contamination of the combustion air()
A. high temperatures
B. low temperatures
C. wet
D. dirty
[单项选择]Air or noncondensable gas is removed from a refrigeration system by a ()
A. separating chamber
B. system of baffles
C. purge valve
D. vacuum reducing valve
[单项选择]A yellow signal floating in the air from a small parachute,about 300 feet above the water,would indicate that a submarine().
A. has fired a torpedo during a drill
B. is about to rise to periscope depth
C. is on the bottom in distress
D. is disabled and unable to surface
[单项选择]A yellow signal,floating in the air from a parachute,about 300 feet above the water,indicates that a submarine().
A. will be coming to periscope depth
B. will be coming to the surface
C. is on the bottom in distress
D. is in distress and will try to surface
[单项选择]The main steering gear must be able to steer the ship at maximum ahead service speed and be capable at this speed, and at the ships deepest service draught, of putting the rudder from 35 degrees on one side to 30 degrees on the other side within no ().
A. more than 28 seconds
B. more than 60 seconds
C. less than 28 seconds
D. less than 60 seconds
[单项选择]Compressed air is supplied by air compression to ().
A. the air receivers
B. the starting valves
C. the cylinder covers
D. the distributors
[单项选择]In reference to air conditioning, when air attains the maximum amount of moisture it can hold at a specific temperature, it is said to be ().
A. superheated
B. saturated
C. condensed
D. convected
[单项选择]In heavy seas the helmsman should steer the survival craft().
A. into the seas
B. broadside to the seas
C. in the same direction as the seas
D. in a series of figure-eights
[单项选择]In heavy seas the helmsman should steer the motor lifeboat().
A. into the seas
B. broadside to the seas
C. in the same direction as the seas
D. in a series of figure-eights