更多"Air leakage between the shaft and s"的相关试题:
[单项选择]On top of scavenging air box is mounted a strong cast iron frame for each cylinder known as（）
A. cooling jacket
B. cylinder liner
C. piston crown
D. cylinder cover
[单项选择]When occurring a fire in the scavenge air box, the following measures should be taken except for（）
A. reducing speed to SLOW and asking bridge for permission to stop
B. stopping the fuel oil supply
C. switching-on the auxiliary blowers
D. putting the scavenge air box fire extinguishing equipment into function
[单项选择]A boundary between two air masses is a(n)（）.
A. lapse rate
B. isobar
C. front
D. continent
[单项选择]If over a period of weeks the air-box pressure of a turbo-charged, diesel engine, operating at full load, appears to be dropping off, the cause can be （）.
A. open air-box drains
B. loss of cooling water to the diffuser
C. gradual fouling of the air filters
D. improperly timed exhaust valves
[单项选择]Air gap is the vertical distance between the bottom of the hull and the（）.
A. still water level
B. wave crest
C. wave crest plus the charted water depth and tidal corrections
D. wave crest plus the charted water depth and tidal correction and storm surge
[单项选择]PAC属于（）。
A. 降滤失剂
B. 降粘剂
C. 堵漏剂
D. 乳化剂
[单项选择]Air receivers installed in starting air systems are to be （）.
A. cylindrical in shape with service connections located at the top and bottom
B. opened and made available for inspection during biannual inspections provided
C. with automatic drain traps for the removal of moisture
D. so installed as to make the drain connections effective under extreme conditions of trim
[单项选择]The projection on a shaft designed to change circular motion into up and down or back and fore motion is called （）.
A. wheel
B. crankshaft
C. running gear
D. cam
[单项选择]Shaft sealing in a centrifugal pump can be effected by （）.
A. the mechanical seal
B. packed stuffing boxes
C. either A or B
D. neither A nor B
[单项选择]Air conditioning is the process of treating air to control （） its temperature, humidity, cleanliness and distribution to meet the comfort requirements of the occupants of the conditioned space.
A. instantaneous
B. instantaneously
C. simultaneous
D. simultaneously
[单项选择]Where a propeller shaft passes through the hull，water is prevented from entering by means of a（）.
A. stuffing box
B. propeller boss
C. seacock
D. stop-water
[单项选择]Sealing in pump shaft is achieved by means of the （）.
A. gasket
B. packing
C. washer
D. spring
[单项选择]If an air compressor is used to supply air primarily to the combustion control system and other pneumatic controllers, the entire system is known as the （）.
A. control air system
B. forced draft air system
C. supply air system
D. ships service air system
[多项选择]PAC中的问题主要反映在（）等方面。
A. 工具短缺
B. 材料短缺
C. 能力短缺
D. 提前期不足
[单项选择]The （） of the main shaft should be measured with a （）.
A. clearance；calipers
B. sinking；bridge gauge
C. diameter；bridge gauge
D. clearance；lead wire
[单项选择]Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or （）.
A. inside micrometer
B. feeler gauge
C. adjustable trammel
D. sighting device
[单项选择]When the tail-shaft is drawn from a vessel in dry-dock, which of the following inspections is required to be carried out?（）
A. The propeller hub taper and shaft keyway should be inspected for cracks or corrosion
B. The stern bearing alignment with the stern frame should be checked
C. The interior of the stern tube should be inspected for leaks
D. The shaft liner should be removed and inspected
