更多"The power developed by a large slow"的相关试题:
[单项选择]（） power is the power developed within the cylinder and can be measured by an engine indicator.
A. The shaft
B. The mechanical
C. The electric
D. The indicated
[单项选择]Thermocouple pyrometers are used on large, main propulsion diesel engines to indicate the temperature of the（）
A. cooling water leaving each cylinder
B. fuel oil entering the injector
C. exhaust gases at various locations
D. lube oil at the bearing supplies
[单项选择]（）is power supplied by main switchboard directly not through sub-board.
A. Deck machinery
B. Little power load
C. Some important load
D. stationary submersible pump
[单项选择]（） is (are) not power supplied by main switchboard directly.
A. Steering gear and windlass
B. Navigation light and radio power panel
C. Navigation device power box
D. Daily fresh water pump
[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]Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.
A. fuel oil vapor at the sludge tank vent
B. unburned fuel vapors in the scavenge air receiver
C. lube oil vapors in the crank case
D. lube oil vapors in the engine room
[单项选择]To （） , the power is supplied by main switchboard directly not though sub-board.
A. save network cost
B. improve the reliability of supplying power to important load
C. prevent sequence reverse
D. increase the power factor of important load
[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]After resolving the trouble of main power supply, main switch of emergency generator should（）, if power supply is refreshed.
A. be switched off by the duty officer
B. be switched on by the duty officer
C. be switched off automatically
D. be switched on automatically
[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]In order to start a large, low-speed, main propulsion diesel engine on high viscosity fuel after an extended shutdown, the （）
A. fuel must be preheated
B. intake air should be preheated
C. lube oil outlet temperature should be increased 20℃ above normal
D. none of the above
[单项选择]A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a （）
A. low TBN value
B. high alkaline reserve
C. low flash point
D. high pour point
[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]（）is the main reason that reduces the power advantage of a two-stroke engine over a same size four-stroke one to about（）
A. Inefficient scavenging；twice
B. Inefficient scavenging；1~8 times
C. Fewer strokes in a circle；twice
D. Fewer strokes in a circle；1~8 times
[单项选择]In comparison to electric power，hydraulic power for jacking systems has the advantage of（）.
A. better control capabilities
B. less maintenance and repair
C. fewer personnel needed during jacking
D. less preload needed
