更多"The is employed to warm up a large "的相关试题:
[单项选择]How should you warm up a diesel engine that has not been run for some time? （）
A. Run it at minimum speed for a period of time
B. Run it at half speed for a period of time
C. Bring it to top speed immediately
D. Inject ether into the air intake
[单项选择]In the process of the stand-by, warm-up the engine usually through give preheat of which parts of the diesel engine?（）
A. cooling water of the cooling system
B. fuel of the FO system
C. LO of the LO system
D. cooling water of the cooling system and LO of the LO system
[单项选择]Which method should be used to warm up the pump turbines prior to discharge（）.
A. Lock the turbine rotor and slowly bleed in steam until operating temperature is reached
B. Run the pump at high speed with the discharge valves closed
C. Run the turbine at slow speed with the pump disconnected
D. Shut the discharge valve and run the pump at slow speed
[单项选择]A diesel engine is warmed up and white vapor is in the exhaust，this could indicate （）
A. excessive cylinder lubrication
B. a lugging engine
C. a leaking cylinder liner
D. overloading of one cylinder
[单项选择]On a large diesel engine installation, crankshaft axial alignment is maintained by the （）
A. piston rod guides
B. engine thrust bearing
C. crosshead bearing
D. main shaft flexible coupling
[单项选择]Stating a large propulsion diesel engine using diesel fuel during cold weather conditions can be made easier by （）
A. increasing the quantity of starting air
B. increasing the lube oil pressure
C. heating the engine fuel supply
D. heating the engine jacket water
[单项选择]Large crosshead type engine generally has two lubrication systems, a function performed only by cylinder oil system is（）
A. lubricating
B. cooling
C. sealing
D. cleaning
[单项选择]The development goals for a large marine engine are many often interact and in some cases even with each other（）
A. conflict
B. accord
C. harmonize
D. struggle
[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]In a large, low-speed diesel engine the clearance between the piston crown and cylinder head is found to be excessiveIn order to correct for this, you should（）
A. build up the piston crown by metal spraying
B. build up the cylinder head by metal spraying
C. insert shims between the crankpin bearing box and the connecting rod foot
D. install a thinner head gasket
[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
[单项选择]A large, low-speed, main propulsion diesel engine uses sea water to directly cool the （）.
A. cylinder heads
B. exhaust valves
C. scavenging air
D. injectors
[单项选择]In a diesel engine, fuel must be broken up into a spray of fine droplets to （）.
A. increase its quality
B. obtain complete burning
C. reduce its weight
D. all of the above
[单项选择]To prevent the build up of high stresses engine must not be run continuously （）.
A. faster than dead slow speed
B. slower than dead slow speed
C. with the output of MCR
D. at critical speeds
[单项选择]While engine is in operation the piston moves up and down, thus causing the rotation of the （）.
A. crankcase
B. slipper
C. cam housing
D. crankshaft
[单项选择]Due to the large amount of heat picked up by the air in boiler and engine rooms, it would be （） to maintain ambient conditions within the comfort zone by air conditioning.
A. possible
B. necessary
C. practicable
D. impracticable
[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
