更多"Compressed air is supplied by air c"的相关试题:
[单项选择]The compressed air is supplied by （） to the air reservoirs.
A. compressors
B. forced fans
C. ventilators
D. generators
[单项选择]
The air supplied to a diesel engine is compressed to （）
(1) provide heat for the ignition of the fuel
(2) decrease injection delay
A. (1) only is correct
B. (2) only is correct
C. both (1) and (2) are correct
D. neither (1) or (2) are correct
[单项选择]Air line lubricators are used in compressed air systems to lubricate （）.
A. the suction and discharge valves
B. tools and equipment served by compressed air
C. air line reducing valves
D. all of the above
[单项选择]When starting an engine, the compressed air enters the cylinder when the corresponding piston is in position of its（）
A. suction stroke
B. compression stroke
C. power stroke
D. exhaust stroke
[单项选择]The compressed air is admitted to each cylinder through a cam operated by starting air valve when the piston has just passed its （）.
A. BDC
B. TDC
C. BBDC
D. ATDC
[单项选择]Compressed air is used on board ship （）.
A. for starting diesel engines
B. in pneumatic control system
C. in pneumatic tools
D. All the above are true
[单项选择]The primary task of the compressed air system is to deliver the starting air necessary for （）
A. starting the ME
B. starting the emergency electric alternator
C. driving the main turbine
D. driving the turbocharger
[单项选择]Compressed air is used on board ship for all the following purposes except （）.
A. starting diesel engines
B. pneumatic control systems
C. pneumatic tools
D. supercharging air
[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]If an air compressor is used to supply compressed air to outlets throughout the engine room and on deck of a vessel, the system is known as the （）.
A. combustion control air system
B. supply air system
C. ships service air system
D. low pressure deck air system
[单项选择]Cooling the intake air supplied to a diesel engine will （）.
A. reduce mean effective pressure
B. decrease average compression pressure
C. decrease air charge density
D. increase power output
[单项选择]The air supplied to the cylinders by a turbocharger is often reduced in volume by a/an （）
A. air compressor
B. diffuser
C. after-cooler
D. ventilator
[单项选择]Low compression results from （）.
A. a worn cylinder
B. broken piston rings
C. either A or B
D. none of the above
[单项选择]In a vapor compression refrigeration the evaporating pressure is maintained constant by the action of the （）, which removes vapor from the evaporator at the same rate at which it is formed.
A. evaporator
B. compressor
C. condenser
D. none of the above
[单项选择]In a compression refrigeration plant the refrigerant flows from the expansion valve and through the （） where it absorbs heat from the space being cooled and becomes a gas or vapor.
A. compressor
B. condenser
C. throttle valve
D. evaporator
[单项选择]Worn main bearing will cause the compression ratio of an auxiliary diesel engine to（）
A. increase
B. decrease
C. remain the same
D. increase on compression decrease on expansion
[单项选择]The function of diesel engine piston compression rings is to （）.
A. prevent piston side thrust
B. prevent engine friction losses
C. transmit heat from the piston to the cylinder liner
D. remove oil from the cylinder combustion space
[单项选择]When a diesel engine compression pressure is checked, the indicator is connected to the （）
A. cylinder exhaust ports
B. injection line
C. cylinder indicator cock
D. banjo oiler line
