更多"At least （） cylinders in four-strok"的相关试题:
[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]The oil lubricating diesel engine cylinders usually contain additives formulated to impart a high degree of alkalinity to （） the acid conditions.
A. invade
B. provide
C. detergent
D. neutralize
[单项选择]The is employed to warm up a large diesel engine before its starting（）
A. hot air
B. hot boiler water
C. cylinder water
D. hot seawater
[单项选择]Before starting the engine the air bottle should be （）.
A. pumped up
B. loaded
C. discharged
D. opened
[单项选择]Poor combustion in a diesel engine can be caused by （）.
A. high compression pressure
B. low intake air temperature
C. low exhaust pressure
D. high scavenge air temperature
[单项选择]The indicated power of an engine can be obtained by taking the （）.
A. precautions
B. rpm
C. indicator cards
D. B and C
[单项选择]Low compression in a diesel engine can be caused by （）
A. clogged coolant passages
B. a leaking cylinder head gasket
C. low fuel oil pressure
D. worn or broken cylinder liner sealing rings
[单项选择]In a diesel engine, a positive displacement type blower is usually （）
A. gear drive by the engine
B. driven by an exhaust gas turbine
C. driven by a camshaft
D. driven by separate motor
[单项选择]Boilers and cylinders are（）.
A. raw metallic products
B. finished metallic products
C. consumable products
D. Manufactured goods of large Size
[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]CO2 cylinders equipped with pressure actuated discharge heads will discharge automatically when（）.
A. the discharge valve is open
B. the control box glass is broken
C. pressure from the control cylinders is detected
D. the control cylinders have been completely discharged
[单项选择]
Exhaust temperature increases in all cylinders, the possible cause may be（）
(1) increased scavenging air temperature
(2) air in fuel pumps and fuel valves
(3) fouling of air and gas passages
A. (1)+(2)
B. (1)+(3)
C. (2)+(3)
D. (1)+(2)+(3)
[单项选择]Successful combustion inside the cylinders of a diesel engine is dependent upon （）.
A. fine atomization
B. high temperature
C. good mixing of fuel and air
D. all of the above
[单项选择]Cylinders of marine diesel engines are normally cooled by （）.
A. sea water
B. fine mineral oil
C. sanitary water
D. fresh water
[单项选择]In a （） engine the charge of air in the cylinder before compression commences is above atmospheric pressure.
A. pressure charged
B. naturally aspirated
C. contaminated
D. high speed diesel
[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 sequence of fuel injection into cylinders is determined by （）.
A. the steering
B. the driven gear
C. the turning gear
D. the timing gear
[单项选择]Turbulence is created in the cylinders of a diesel engine to （）
A. obtain injection lag
B. help mix fuel and air
C. increase combustion pressure
D. utilize higher injection pressures
