更多"In modern installations, the main e"的相关试题:
[单项选择]Diesel engine main and connecting rod precision bearings are made in halvesEach half exceeds one-half the bearing circumference by a small amountThe small amount is termed （）.
A. clearance
B. crush
C. pitch
D. thrust
[单项选择]In twin-screw engine installations while going ahead，maneuvering qualities are most effective when the tops of the propeller blades both turn（）.
A. to starboard
B. outboard from the center
C. to port
D. inboard toward the center
[单项选择]The main purpose of changing main engine to electronic controlled is not to（）
A. control fuel injection time more precisely
B. control fuel injection rate more precisely
C. meet the environmental requirements
D. meet high engine speed requirements
[单项选择]In a modern internal combustion diesel engine, the load carrying part of the engine is referred to as the（）
A. bedplate or base
B. sump or oil pan
C. cylinder block
D. frame
[单项选择]In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.
A. metal particles loosened by wear
B. air when no air cleaners are used
C. condensation of water vapors
D. breakdown of the lubricating oil by dilution
[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]The oil index of main engine should be controlled to prevent it from in heavy weather（）
A. over heat
B. over speed
C. over pressure
D. over worn
[单项选择]Main engine room control console alarms are to be of the self monitoring type, meaning that an open circuit to a particular alarm circuit will （）
A. cause an alarm condition
B. secure power to the indicator
C. secure power to the monitored device
D. automatically recluse within 10 seconds
[单项选择]Suppose the rated capacity of the main engine of a ship is 10,000 KW at 100 rated rpm, then when at 80 rpm its capacity should be （）.
A. 800 KW
B. 5120 KW
C. 6400 KW
D. 4180 KW
[单项选择]The main purpose of starting the diesel engine on air briefly is（）
A. to inspect if the cylinder has the water leakage
B. to expel out the residual water/gas/oil from the cylinder
C. to check if fuel supply is normal
D. A and B
[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]On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measured by using a/an （）
A. dial indicator
B. outside caliper
C. bridge gauge
D. tram rod
[单项选择]During sea trial, the main engine well be kept run at load（）
A. 100%
B. 110%
C. 85%
D. different
[单项选择]Who is in charge of the main engine?（）
A. The chief engineer
B. The second engineer
C. The third engineer
D. The fourth engineer
[单项选择]Worn main bearings in a diesel engine can result in （）
A. decreased compression pressure
B. increased lube oil pressure
C. lower lube oil temperature
D. excessive leakage past the piston rings
[单项选择]Piston No2 of main engine has been removed, and it will be （） by noon tomorrow.
A. lifted
B. reassembled
C. dismounted
D. disassembled
[单项选择]The main engine is cooled with fresh water （）is added suitable small quantities of chemicals to prevent corrosion.
A. in which
B. on which
C. to which
D. by which
[单项选择]On a medium-speed main propulsion diesel engine, the crank-pin or crank journal bearings receive lubricating oil from （）.
A. a spindle lubricator
B. an oil jet
C. internal splashing
D. drilled passages in the crankshaft
[单项选择]In large, low-speed, main propulsion diesel engine, position ring groove wear usually occurs at the（）
A. top of the ring groove
B. back of the ring groove
C. bottom of the ring groove
D. piston ring end clearance
