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)
PRESSURE DROP AND SPILL VALVE活门的作用是()。
- A、当高压燃油泵的出口压力过高时,该活门打开,释放一部分压力
- B、当低压燃油泵的出口压力过高时,该活门打开,释放一部分压力
- C、当PRSOV的出口压力过高时,该活门打开,释放一部分压力
- D、当燃油喷嘴的出口压力过高时,该活门打开,释放一部分压力
参考答案
更多 “PRESSURE DROP AND SPILL VALVE活门的作用是()。A、当高压燃油泵的出口压力过高时,该活门打开,释放一部分压力B、当低压燃油泵的出口压力过高时,该活门打开,释放一部分压力C、当PRSOV的出口压力过高时,该活门打开,释放一部分压力D、当燃油喷嘴的出口压力过高时,该活门打开,释放一部分压力” 相关考题
考题
Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?A.Pressure-reducing valveB.Unloading valveC.Counterbalance valveD.Pressure-relief valve
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
You are discharging cargo and the inert gas system is in operation to inert the tanks. The pressure in a tank being discharged starts to drop below the allowable limit. What action should you take?A.Cut in another IG fan to increase gas flowB.Open the pressure control valve until the pressure increasesC.Open the tank isolation valve to the fully open positionD.Reduce the pumping rate
考题
The opening in the deck beneath the anchor windlass that leads to the chain locker is the ______.A.Hawse pipeB.Fall pipeC.Drop-pipeD.Spill pipe
考题
燃调中哪个部件控制近进慢车和地面慢车A、全速监控器(All Speed Governor)B、压降监控器(Pressure-drop governor)C、P3P储压器D、近进慢车电磁活门
考题
单选题() are used to limit the pressure in any particular portion and mainly control the pressure after the valve.A
Relief valvesB
Check valvesC
Safety valvesD
Reducing valve
考题
单选题Petroleum cargo tanks should not be topped off at deck level when loading on a cold day because().A
a subsequent temperature rise will cause the cargo to overflowB
air pockets may cause the cargo to bubble out of the ullage holeC
the increased viscosity of the product requires higher loading pressure which increases the chances of a spillD
the tank valve may be stiff and a spill will occur before the valve can be closed
考题
单选题A more sophisticated pressure reducing valve incorporates a pilot valve which controls the fluid above the valve operating piston in response to downstream pressureThe bold and italic word “which” means ().A
a pressure reducing valveB
a pilot valveC
an operating pistonD
downstream pressure
考题
单选题A pressure drop through the refrigerant liquid line may cause ().A
solenoid valve to seizeB
compressor to huntC
formation of flash gas in the liquid lineD
expansion valve to freeze open
考题
单选题During the fuel injection period, fuel pressure must exceed cylinder gas pressure to ().A
ensure penetration and distribution of the fuel in the combustion chamberB
ensure the needle valve is flushed clean during each injectionC
prevent combustion gas blowback into the open needle valveD
prevent reflected pressure waves when the needle valve closes
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Why is it important for fuel oil tanks not to be topped off at the inner bottom level when loading on a cold day?()A
Increased viscosity of the product needs higher loading pressure, which increases the chances of a spillB
Air pockets may cause the fuel to bubble out of the ullage holeC
The temperature rise of the fuel will cause an overflowD
Fueling valve may become stuck closed and cause the fuel oil to spill before the valve can be opened
考题
单选题The arrangement and shape of the cams on a diesel engine camshaft directly control which of the listed groups of operating conditions?()A
speed, torque, and horsepower productionB
firing order, valve timing, and valve liftC
fuel consumption, efficiency, and cylinder pressureD
scavenge pressure, compression ratio, and exhaust pressure
考题
单选题The thermal expansion valve reacts directly to the ()A
temperature in the space being cooledB
liquid refrigerant pressure at the solenoid valveC
pressure drop across the evaporator coilsD
refrigerant gas superheat at the coil outlet
考题
单选题You are discharging cargo and the inert gas system is in operation to inert the tanks. The pressure in a tank being discharged starts to drop below the allowable limit. What action should you take? ()A
Cut in another IG fan to increase gas flowB
Open the pressure control valve until the pressure increasesC
Open the tank isolation valve to the fully open positionD
Reduce the pumping rate
考题
单选题A thermostatic expansion valve is properly controlling evaporator superheatAdjusting this valve to lower the superheat will result in a/an ().A
evaporator pressure decreaseB
evaporator coil over-feedC
evaporator capacity increaseD
expansion valve diaphragm rupture
考题
单选题The thermostatic valve has a throttling action, that is to say the valve can()A
stop the refrigerant from flowingB
force the refrigerant to flowC
cause the refrigerant pressure to riseD
cause the refrigerant pressure to fall
考题
单选题An axial piston, variable stroke pump is used in a vessels hydraulic steering gearUnder pressure, oil continually leaks out from between the valve plate/cylinder barrel and will().A
cause loss of hydraulic oil from the systemB
result in extreme damage to the pumpC
cause damage to the pump ff not continually drained from the pump casingD
result in the system high side pressure to substantially drop off
考题
单选题The low pressure side of a refrigeration system is considered to exist from the ().A
expansion valve to the compressorB
receiver to the expansion coilC
expansion valve to the evaporatorD
condenser to the expansion valve
考题
单选题Which of the listed components is considered to separate the high pressure side of a refrigeration cycle from the low pressure side of the cycle?()A
The condenser and the expansion valveB
The king valve and the solenoid valveC
The compressor and the expansion valveD
The condenser and the solenoid valve
考题
单选题A pressure drop in the liquid line of a refrigeration system may cause()A
the solenoid valve to seizeB
the compressor to huntC
flash gas to form in the liquid lineD
the expansion valve to freeze open
热门标签
最新试卷