更多"A large, low-speed, crosshead, main"的相关试题:
[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]The position of （） on the crosshead on a large diesel engine is determined by dowel pins.
A. the guideway
B. the piston rod
C. the crosshead shoes
D. the interlocked circlip
[单项选择]An indication of an overloaded main propulsion diesel engine is （）
A. white smoke in the exhaust
B. high exhaust gas pyrometer readings
C. sparks in the exhaust
D. blue smoke in the exhaust
[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 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]Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to （）
A. decrease the time required between cleanings
B. removes all large and small foreign objects
C. ensure a positive flow of oil at all times
D. ensure that all lube oil has been treated twice
[单项选择]In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?（）
A. Bed plate
B. Column
C. Entablature
D. Tie rod
[单项选择]When running a large, low-speed, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching back over to diesel oil?（）
A. The diesel oil must never be allowed to mix with the heavy fuel
B. The temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valve
C. The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valve
D. The heating steam must be secured before the diesel oil passes through the three-way valve
[单项选择]Large, two-stroke/cycle, main propulsion, diesel engine cylinders can be successfully pressure charged during normal operation, by using the （）.
A. exhaust gas temperature system
B. exhaust load system
C. constant or pulse pressure system
D. constant volume system
[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]Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the （） and a recirculation system lubricating the running gear and cooling the piston.
A. cylinder liners and piston rings
B. main bearings
C. crankpin bearings
D. turboblower
[单项选择]Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?（）
A. The expansion tank should be topped off
B. The thermostatic water regulating valves should be manually opened
C. The fuel filters should be changed
D. The engine should be turned over slowly with the indicator cocks open
[单项选择]Today, crankshafts for large 2-stroke crosshead engines are of the （）type.
A. semi-built
B. built-up
C. solid forged
D. individual forged
[单项选择]Cast iron pistons used in large propulsion diesel engines are constructed with （）
A. not taper what so ever
B. the skirt being tapered and smaller than the crown
C. the skirt being tapered and larger than the crown
D. the crown being tapered and smaller than the skirt
[单项选择]The main propulsion diesel continues running after you try to shut downYoushould now attempt to（）
A. stop the combustion air supply
B. engage the jacking gear
C. secure the lube oil pump
D. shut off the fuel at the day tank
[单项选择]When attempting to start a main propulsion diesel engine, the engine, the engine turns at the proper speed but will not startYou should check the（）
A. starting air pressure
B. scavenge air pressure
C. over-speed trip
D. banjo oiler line
