更多"The essential part of the diesel en"的相关试题:
[单项选择]In the combustion chamber, the part whose surface is exposed to the highest temperature is the （）.
A. cylinder liner
B. cylinder cover
C. piston
D. exhaust valve
[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]If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.
A. at each control station
B. in the chief engineer’s quarters
C. in the captains quarters
D. All of the above are correct
[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]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]Before starting an engine by air, the engine must（）
A. be turned by a turning gear for at least one minute
B. be turned by a turning gear for at least two minutes
C. be turned at least one complete turn
D. be turned at least two complete turns
[单项选择]Such an engine frame helps （） the engine and so protect the bearings from the deformation forces transmitted via the ships double bottom.
A. to stiffen
B. to soften
C. to loosen
D. to wear
[单项选择]（） the engines, the diesel engine is（） used engine on board.
A. Between；more commonly
B. Among；the most commonly
C. Between；not more commonly
D. Among；not the most commonly
[单项选择]设函数fun的定义形式为void fun（char ch，float x）{……}则以下对函数fun的调用语句中，正确的是（）
A. fun（"abc"，3.0）；
B. t=fun（’D’，16.5）；
C. fun（’65’，2.8）；
D. fun（32，32）；
[单项选择]
A crankshaft whose center of gravity coincides with its center line is said to be（）
Ⅰ.statically balanced
Ⅱ.dynamically balanced
A. Ⅰ only
B. Ⅱ only
C. both Ⅰ and Ⅱ
D. neither Ⅰ nor Ⅱ
[单项选择]Vertically below the deckline is a circle whose outside diameter is 300mm.It is called the（）.
A. the deck line
B. Plimsoll disc
C. Plimsoll line
D. summer load line
[单项选择]No person whose license has been revoked shall be issued another license except upon（）.
A. approval of the Commandant
B. taking a new examination
C. approval of the Officer-in-Charge，Marine Inspection
D. approval of an administrative law judge
[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]On vessels over 100 gross tons，whose responsibility is it to ensure that all able seamen in the vessel’s crew have the documents and qualifications required by law and regulation?（）
A. Master of the vessel
B. USCG Officer in Charge of Marine Inspection
C. Owner or operator of the vessel
D. Company's personnel director
[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]Precision engine bearing inserts are manufactured with a small portion of the bearing ends extending beyond the bearing housing or capsThe installation process of these bearings requires sufficient （）.
A. overlap
B. crush
C. lap or lead
D. protrusion
[单项选择]Internal combustion engine crankcase vent outlets must be equipped with （）
A. hinged rain guards
B. corrosion resistant flame screens
C. dipsticks for measuring oil levels
D. crankcase ventilation fans
