更多"Camshafts are usually driven by tim"的相关试题:
[单项选择]（） is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.
A. An air receiver
B. An operating valve
C. An automatic valve
D. An air distributor
[单项选择]Most hydraulic steering gears are fitted with relief valves which（）
A. function when the rudder is amidships
B. relieve excess whip pressure from the hydraulic oil system
C. protect the piping assembly from external rudder shock
D. relieve excessive telemotor pressure
[单项选择]Steering gears can be arranged with hydraulic control equipment known as a （）, or with electrical control equipment.
A. telemeter
B. telemanometer
C. telemotor
D. telemometer
[单项选择]Winch gears must be maintained in proper alignment to prevent （）.
A. overheating of the lube oil
B. over-speeding of the motor
C. wear on the braking system
D. damage to the teeth
[单项选择]声音图标的属性对话框有Sound（声音）和Timing（播放时间）两个选项卡，点击Timing选项卡，（）项用来控制声音文件播放时和下一个图标运行的关系。
A. 同时
B. 播放
C. 速率
D. 开始
[单项选择]An electrically driven automatically operating auxiliary blower is provided for slow speed and （） of a low speed diesel engine.
A. manoeuvring operations
B. bad combustion
C. cooling
D. mooring trial
[单项选择]In using reduction gears to obtain efficient propeller speeds, （）.
A. they must be located at the after end of the engine
B. they can only be used with one engine at a time
C. they eliminate the need for controllable pitch propellers
D. they are connected to the engine with a flexible coupling
[单项选择]With Variable Injection Timing the start of injection may be （）as the engine load is reduced.
A. advanced
B. retarded
C. kept constant
D. none of the above
[单项选择]Early fuel injection timing is indicated by the cylinder pressure being（）
A. above normal with a below normal exhaust temperature
B. above normal with a normal exhaust temperature
C. below normal with a normal exhaust temperature
D. below normal with an above normal exhaust temperature
[单项选择]Defective timing gear in a diesel engine may lead to （）.
A. smoky exhaust
B. starting failure
C. overload
D. over speed
[单项选择]Early injection timing is indicated by （）.
A. high exhaust temperature and low firing pressure
B. high exhaust temperature and high firing pressure
C. low exhaust temperature and low firing pressure
D. low exhaust temperature and high firing pressure
[单项选择]Late fuel injection timing is indicated by （）
A. lower than normal cylinder pressure and low exhaust temperature
B. lower than normal cylinder pressure and high exhaust temperature
C. higher than normal cylinder pressure and low exhaust temperature
D. higher than normal cylinder pressure and high exhaust temperature
[多项选择]Message Driven Bean的特点包括（）
A. 它是匿名的
B. 它具有本地或者远程接口
C. 它由容器异步调用
D. 该Bean完全在一个容器范围内存活，容器管理它的生命周期和环境
[单项选择]According to Regulations, a power driven auxiliary steering gear for a vessel capable of a 20 knot service speed, must be capable of producing a rudder movement at which of the minimum speeds listed below?（）
A. 7 knots
B. 10 knots
C. 15 knots
D. 20 knots
[单项选择]When used with reversing reduction gears, medium-speed diesel engines should be bolted to their foundations with fitted bolts at the drive end and clearance(loosely fitted) bolts in other locations √This is done to （）
A. maintain alignment when the ship’s hull is working in heavy seas
B. ensure engine vibrations correspond to the natural frequency of the hull
C. permit the engine to expand away from the driven equipment as the engine heats up and expands
D. maintain engine thrust bearing clearances
[单项选择]Modem engines make use of exhaust gas driven turbo-chargers to supply pressurized fresh air for （） and supercharging.
A. scavenging
B. starting
C. cooling
D. blowing
[单项选择]A power-driven vessel towing another vessel astern (tow less than 200 meters) shall show （）.
A. three masthead lights in a vertical line instead of either the forward or after masthead light
B. two masthead lights in a vertical line instead of either the forward or after masthead lights
C. two towing lights in a vertical line at the stern
D. a small white light aft of the funnel
[单项选择]If an electric motor driven air compressor fails to start, it may be due to a （）.
A. leaking discharge valve
B. jammed suction valve
C. tripped overload relay
D. broken discharge un-loader
[单项选择]The air distributor is conventionally driven by（） and distributes into each cylinder by（） certain sequence.
A. camshaft；fresh air
B. camshaft；starting air
C. electronic motor which is controlled by a computer；fresh air
D. electronic motor which is controlled by a computer；starting air
