网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
If a single cylinder relief valve on a main propulsion diesel engine begins to lift, but it is not possible to secure the engine, which of the following actions should be taken?（）
A
Increase the cooling water flow to the engine
B
Secure or reduce fuel to that cylinder
C
Screw down on the pressure adjusting spring to decrease to decrease popping pressure
D
Readjust the injection timing
参考答案
参考解析
解析：
暂无解析
更多 “单选题If a single cylinder relief valve on a main propulsion diesel engine begins to lift, but it is not possible to secure the engine, which of the following actions should be taken?（）A Increase the cooling water flow to the engineB Secure or reduce fuel to that cylinderC Screw down on the pressure adjusting spring to decrease to decrease popping pressureD Readjust the injection timing” 相关考题
考题
If the head pressure of a reciprocating refrigeration compressor is excessiveA.the relief valve should open before the high pressure cutoutB.the relief valve should open and allow the excess refrigerant to flow to the receiverC.the high pressure cutout switch should operate before the relief valve opensD.you should close the discharging valve
考题
What type of valve is used to direct the flow of hydraulic fluid?A.relief valveB.direction control valveC.stop valveD.pressure control valve
考题
单选题The rate of cylinder lubricating oil metered to each cylinder of a large low-speed main propulsion diesel engine is （）A
the same, whether at sea, or during maneuveringB
adjusted during each hour of operation while at constant RPMC
higher at sea than while maneuveringD
lower at sea than while maneuvering
考题
单选题A substantial increase pressure could be an indication of a/an （）A
worn cylinder linerB
faulty cylinder relief valveC
excessive lube oil pressureD
excessive scavenge air pressure
考题
单选题The opening or closing of the cylinder starting valve is controlled by （）.A
the starting air distributorB
the cut-off valve on the air mainC
the main starting valveD
the air bottle control valve
考题
单选题A substantial increase in crankcase pressure could be an indication of （）A
excessive lube oil pressureB
the proper seating of new ringsC
a worn cylinder linerD
a malfunctioning cylinder relief valve
考题
单选题On a single-screw vessel the stern frame（）.A
furnishes support to the rudder，propeller shaft，and transom frameB
provides foundations for after mooring winchesC
provides foundations for the main propulsion enginesD
transfers the driving force of the propeller to the hull
考题
单选题Which one of following statement is not true concerning the suitable sites of the direct acting relief valve and the pilot operated relieve valve?（）A
the direct acting relief valve is used for controlling lower flows and pressureB
the pilot operated relief valve is used for controlling higher flows and pressureC
the pilot operated relief valve is used for controlling lower flows and pressureD
the controlling accuracy of direct acting relief valve is worse than that of the pilot operated relief valve
考题
单选题The opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by （）.A
direct action of cam shaftB
compressed air pressureC
hydraulic “push rods”D
direct action of the main piston moving down
考题
单选题If the relief valve on a diesel engine cylinder lifts, the cause could be due to （）A
liquid in the cylinderB
low compression in the cylinderC
high exhaust temperatureD
poor fuel penetration
考题
单选题Blow-off of the relief valves of the main cylinders during operation indicates （）.A
the cylinder cover is crackedB
the injector holes is cloggedC
the cams are not properly setD
fuel pump is leaking
考题
单选题If a single cylinder relief valve on a diesel engine lists frequently while the engine is running, the cause may be an （）A
excessively late injection timing for each cylinderB
incorrectly adjusted intake valve timingC
incorrectly adjusted fuel injectorD
incorrectly adjusted intake valve clearance
考题
单选题Which of the conditions listed could cause the cylinder relief valves on a large, low-speed, propulsion diesel engine to lift?（）A
Plugged injector nozzlesB
Excessive fuel injectionC
Very late injection timingD
Incorrect crankshaft clearance
考题
单选题Operating a propulsion diesel engine at less than 30% of designed normal load for prolonged periods will result in （）.A
decreased fuel consumption per brake horsepowerB
more complete cylinder scavengingC
extended valve lifeD
carbon formation on combustion chamber surfaces
考题
单选题The most practical way of detecting an overload in one cylinder of an operating large, low-speed ,main propulsion diesel engine is to （）A
check the cylinder exhausts for black smokeB
listen for combustion knock in that cylinderC
isolate each cylinder and inspect the injectorD
check the cylinder exhaust temperature frequently
考题
单选题To correct a hunting problem in a main propulsion diesel engine hydraulic governor, you should （）.A
increase the governor oil pressureB
adjust the speed droop settingC
adjust the speeder spring travelD
adjust the compensating needle valve
考题
单选题If the head pressure of a reciprocating refrigeration compressor is excessive, （）.A
the relief valve should open before the high pressure cutoutB
the relief valve should open and allow the excess refrigerant to flow to the receiverC
the high pressure cutout switch should operate before the relief valve opensD
you should close in on the suction valve
考题
单选题Opening of the cylinder （） will admit compressed air into the cylinder.A
safety valveB
indicator cockC
blow-down valveD
start valve
考题
单选题If a main propulsion diesel engine hunts excessively at idle speed, you should （）A
adjusts the idle speed controlB
drain and flushes the governor and replace the oilC
adjusts the compensating needle valve
考题
单选题If the head pressure is too high,（）A
the relief valve should open before the high-pressure cutoutB
the relief valve should open and let excess refrigerant go to receiverC
the high-pressure cutout switch should operate before the relief valve opensD
close in on the suction valve
考题
单选题Which of the following problems will occur if the internal drain at either end of a hydraulic, two-way, spool-type directional control valve cylinder were to become plugged?（）A
The reservoir would become vapor boundB
The valve would be placed in hydraulic lockC
The spring loaded relief ports would openD
The buffering chambers would be unable to function
考题
单选题Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to （）A
test the starting systemB
remove condensation from the cylindersC
check the compressionD
check for proper lube oil pressure
考题
单选题A relief valve for a cargo pump is generally installed（）.A
after the discharge valveB
between the pump and discharge valveC
after the suction valveD
between the pump and suction valve
考题
单选题A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a （）A
low TBN valueB
high alkaline reserveC
low flash pointD
high pour point
考题
单选题If it becomes necessary to cutout an individual cylinder of a large, low-speed, main propulsion diesel engine, the fuel to that cylinder should be secured and its （）A
fuel pump should be removed and all connections blanked offB
cylinder oil feed rate should be increased slightly above that used at normal sea speedC
cylinder oil feed rate should be reducedD
cylinder oil feed rate should be increased to the maximum flow capable of the metering pump
考题
单选题When the starting air valve closes on one cylinder, another starting air valve has （） opened on another cylinder whose piston has just commenced its downward stroke.A
justB
nearlyC
merelyD
already
考题
单选题Cylinder lubrication oil for low speed main propulsion diesel engines is admitted to each cylinder during （）.A
the power strokeB
the compression strokeC
low load operation onlyD
periods of standby
热门标签
最新试卷
