更多"Excessive clearances in the main or"的相关试题:
[单项选择]（） clearances in the main or crank pin bearings will sometimes be indicated by loss of pressure in the lubricating system before any bearing knock is heard.
A. Too larger
B. Too smaller
C. Excess
D. Excessive
[单项选择]If a main propulsion diesel engine hunts excessively at idle speed, you should （）
A. adjusts the idle speed control
B. drain and flushes the governor and replace the oil
C. adjusts the compensating needle valve
[单项选择]Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean （）.
A. lower low water
B. high water
C. low water
D. sea level
[单项选择]Cold clearances between the skirt of an aluminum piston and the cylinder liner is about （）
A. twice as large as with a cast iron piston
B. the same size as with a cast iron piston
C. half as large as with a cast iron piston
D. the same size as the crown of an aluminum piston
[单项选择]An increase in rotor clearances in a rotary pump will （）.
A. increase discharge pressure
B. decrease pump capacity
C. decrease pump cavitation
D. decrease reaction ring clearance
[单项选择]Excessive vibration of an automatically fired auxiliary boiler can be caused by （）
A. air or water in the furnace
B. combustion pulses
C. fuel oil pump failure
D. flame failure
[单项选择]Excessive lube oil consumption by a reciprocating air compressor can be caused by （）.
A. using a slightly dirty air filter
B. using oil having an excessive viscosity
C. intercooler or after-cooler leaks
D. carrying the oil level higher than normal
[单项选择]Excessive lubricating oil consumption in a running diesel engine can be caused by （）
A. clogged lube oil piping
B. excessive valve-guide clearance
C. high lube oil viscosity
D. low lube oil temperature
[单项选择]Excessive vibration in an operating diesel generator may be caused by （）
A. electrical overload
B. surging at governed RPM
C. loose engine mounting bolts
D. coolant leaking into the cylinder
[单项选择]Excessive lube oil consumption can result from worn or broken（）
A. piston rings
B. valve guides
C. valve seals
D. all of the above
[单项选择]To avoid excessive surge pressure when bunkering, you should （）
A. bunker at a normal rate
B. check for kinks in hose
C. close valves slowly
D. shut valves before topping off
[单项选择]Excessive valve lash in an auxiliary diesel engine will cause the valves to open（）
A. later and close sooner
B. sooner and close later
C. sooner and close sooner
D. later and close later
[单项选择]Where an excessive level of contamination is detected an alarm is sounded and diverting valves are operatedThe discharging liquid is then passed to （）.
A. overboard
B. a bilge well
C. a slop tank
D. a hot well
[单项选择]Excessive alkalinity of the water in an auxiliary boiler can cause （）.
A. caustic embrittlement of the boiler metal
B. acidic corrosion of the boiler metal
C. hard scale deposits on the boiler tubes
D. etching of the heat exchange surfaces
[单项选择]Excessive scale formation in a distilling plant may result from （）.
A. poor distillate quality
B. reduced evaporator capacity
C. low brine concentration
D. improper vacuum regulation
[单项选择]To avoid excessive pressures in the fuel oil filling system during bunkering, you should （）.
A. close the tank filling valves quickly
B. top off all tanks at the same time
C. rill completely all tanks to less than 95% full
D. reduce the loading rate when topping off
[单项选择]Excessive diesel engine back pressure may be an indication of （）
A. carbon buildup in the exhaust manifold
B. overcooling of the exhaust manifold
C. eroded muffler baffle plates
D. high injection pressure
[单项选择]If a used lube oil analysis indicates an excessive chromate content, this means （）
A. air filtration is inadequate
B. engine coolant leaking into the lube oil
C. fuel oil is leaking into the lube oil
D. the piston rings are excessively worn
[单项选择]The indications of a scavenge fire are excessive black smoke, （） and peeling from scavenge trunking.
A. turbo-chargers surge
B. spark seen from the drains
C. paint blistering
D. all above are right
