更多"Now that the valve is not worth （）,"的相关试题:
[单项选择]If the operating element of a thermostatic valve installed in a diesel engine cooling system malfunctions, it may result in （）
A. a low level in the engine expansion tank
B. excessively high coolant pressure
C. improper temperatures
D. malfunctioning of the jacket water heater
[单项选择]In its simplest form the pressure reducing valve is opened or closed by （） which is balanced by the downstream pressure acting on a diaphragm.
A. adjusting a nut
B. a pre-tensioned spring
C. any spring
D. upstream pressure
[单项选择]I（）finish my homework now. I can do it at the weekend.
A. have to
B. don‘t have to
C. must
D. mustn‘t
[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]Can I take your order now?（）
A. Thank you for you offer.
B. Sorry, it‘s beyond my order.
C. By no means.
D. Just a moment. Tow friends are coming.
[单项选择]Hello, may I talk to the director now?（）
A. Sorry, he is busy at the moment.
B. No, you can't.
C. Sorry, you can't.
D. I don't know.
[单项选择]The ship is now too much listing to portaide. I suggest that you（）light cargo on portside and heavy cargo on starboard side.
A. will put
B. would put
C. put
D. shall put
[单项选择]The ship is now too much listing to portside.I suggest that you（）light cargo on portside and heavy cargo on starboard side.
A. will put
B. would put
C. put
D. shall put
[单项选择]－Hello, may I talk to the headmaster now?－（）
A. Sorry, you can’t
B. No, you can’t
C. sorry, he is busy at the moment
[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]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
