更多"Broken valve strips in an operating"的相关试题:
[单项选择]Broken intake valve springs on one cylinder of a diesel engine can cause the engine to （）
A. Over speed
B. fire improperly
C. lose oil pressure
D. overheatrapidly
[单项选择]When normal operating pressure is applied to the hydraulic oil used in a high-pressure system, the oil （）.
A. viscosity will decrease
B. volume will increase
C. volume will decrease
D. pour point will be reduced
[单项选择]Pressure in an operating hydraulic system is developed （）.
A. only by the pump as its primary function
B. by resistance to the fluid flow through the system
C. by the thermal input to the systems fluid
D. solely by the charge applied by the accumulators
[单项选择]The pressure in an operating diesel engine cylinder continues to rise for a short period after the piston passes top dead center as a result of the （）
A. expansion of the combustion gases
B. exhaust and intake valves just closing
C. maximum compression is just being attained
D. fuel injection occurring at that point and combustion begins
[单项选择]The ship（）on a low rock was broken in two by the waves.
A. that had been driven
B. had been driven
C. have been driven
D. which to have been driven
[单项选择]Increasing the valve clearance between a valve stem and rocker arm, will result in the valve （）
A. closing later
B. opening sooner
C. staying open for a shorter period of time
D. staying open for a longer period of time
[单项选择]The needle valve in a fuel valve will （） when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.
A. be jammed
B. be opened
C. be seated
D. be broken
[单项选择]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 valve
B. a pilot valve
C. an operating piston
D. downstream pressure
[单项选择]A thermostatic expansion valve is properly controlling evaporator superheatAdjusting this valve to lower the superheat will result in a/an （）.
A. evaporator pressure decrease
B. evaporator coil over-feed
C. evaporator capacity increase
D. expansion valve diaphragm rupture
[单项选择]Thermostatic expansion valve are （）.
A. either all the way open or all the way closed
B. normally open
C. throttled depending on load
D. controlled by suction pressure
[单项选择]Overflow valve is used to （）
A. control the fluid flow through it
B. prevent the pressure before it over the specified valve
C. make the pressure after it steady
D. control the direction of oil flow
[单项选择]During working, thermostatic expansion valve should be （）.
A. either all the way open or all the way closed
B. normally fully open
C. throttled depending on load
D. controlled by liquefied pressure
[单项选择]Broken piston rings manifest themselves during the scavenge port inspection by（）
A. Lack of elastic tension, when the rings are pressed into the groove by means of a stick
B. Blackish appearance
C. Fractured rings and missing rings
D. all off the above
[单项选择]Valve的中文含义是（）。
A. 电压
B. 电阻
C. 电容
D. 电流
[单项选择]As the refrigerant passes through the valve orifice, its pressure is reduced and part of the refrigerant turns into （）.
A. liquid
B. oily mixture
C. emulsion
D. vapor
[单项选择]
The exhaust valve opens before bottom dead center in a four stroke engine to（）
Ⅰ.allow for blow down
Ⅱ.Reduce pumping losses
A. Ⅰ only
B. Ⅱ only
C. both Ⅰ and Ⅱ
D. neither Ⅰ nor Ⅱ
[单项选择]The emergency bilge suction valve is typically used （）.
A. to inject cleaning additives when the bilges are extremely dirty
B. when the main condenser becomes fouled, in order to provide additional cooling water circulation
C. to connect the rose box to the independent bilge suction
D. if the bilges become flooded and they can not be emptied by any other means
[单项选择]The mechanical exhaust valve operation system is replaced by（）in an electronic controlled ME engine.
A. a system with a Hydraulic Power Supply (HPS) unit
B. a system with roller guides for exhaust valves
C. a system with an electronically controlled Alpha Lubricator
D. a system directly powered by electric motor
