更多"If a diesel engine is difficult to "的相关试题:
[单项选择]By far the greatest use is for diesel engine starting using air pressure of 25 bar or more provided by （）.
A. rotary compressors
B. reciprocating compressors
C. centrifugal compressors
D. screw compressors
[单项选择]Diesel engine air start valve timing is controlled by（）
A. engine operating speed
B. an air manifold
C. a hydraulic distributor
D. individual cams and valve gear
[单项选择]Diesel engine air start system check valves are opened by （）
A. an air start cam
B. cylinder compression pressure
C. starting air pressure
D. valve springs
[单项选择]A diesel engine fails to start due to excessive water in the fuelBefore the engine can be started, the water should be removed from the（）
A. fuel lines
B. lube oil filter
C. crank case pump
D. rocker arm reservoir
[单项选择]A diesel engine fails to start because of water in the fuelIn order to start the engine, you should （）?
A. turn engine with jacking gear
B. drain filters and strainers and bleed off water at each injection pump
C. use ether to start the engine with blow-down valves open
D. blow through the cylinders and fuel lines with a drying agent
[单项选择]An auxiliary diesel engine may fail to start due to（）
A. low exhaust back pressure
B. high lube oil temperature
C. insufficient cranking speed
D. excessive fuel atomization
[单项选择]If a diesel engine fails to start，one of the likely causes is （）
A. low compression temperature
B. low ambient air pressure
C. high lube oil pump pressure
D. high fuel oil booster pump pressure
[单项选择]A diesel engine could fail to start because of （）
A. incorrect injection timing
B. low exhaust back pressure
C. floating exhaust valves
D. excessive cranking speed
[单项选择]A diesel engine may fail to start due to （）
A. low air charge temperature
B. high cranking speed
C. excessive fuel dilution of lube oil
D. high compression pressure
[单项选择]A diesel engine may be hard to start if the （）
A. air intake is restricted
B. engine is cranked too fast
C. vibration dampener is faulty
D. exhaust back pressure is low
[单项选择]Engine coolant accumulating in the diesel engine lubricating oil can result from a （）
A. low oil pressure
B. high coolant pressure
C. leaking fuel injector
D. cracked cylinder head or liner
[单项选择]Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.
A. open the bypass line
B. cut in the lube oil cooler
C. pressurize the lube oil system
D. top off the expansion tank
[单项选择]The marine diesel engine is a type of diesel engine used on ships The （） of its operation is not very difficult to understand.
A. principle
B. principal
C. cause
D. case
[单项选择]A diesel engine is similar to a gasoline engine except that the former has no （）.
A. cross-head
B. cylinder
C. connecting rod
D. spark plug
[单项选择]Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps which are （）.
A. operated manually once an hour
B. operated until the engine has started
C. placed into operation only at maximum load
D. adjustable to meet lubrication requirements
[单项选择]Diesel engine mufflers accomplish noise reduction by （）
A. reducing exhaust gas velocity
B. increasing the frequency of gas vibration
C. the use of long head pipes
D. the use of zinc electrodes
[单项选择]A diesel engine burns （） a gasoline engine of the same capacity in the same period of time.
A. as much fuel as
B. less fuel than
C. less fuel as
D. more fuel than
[单项选择]Diesel engine fuel oil contamination often results in （）
A. governor malfunctions
B. fuel injection system malfunctions
C. high cylinder lube oil temperatures
D. low intake temperatures
