更多"A more sophisticated pressure reduc"的相关试题:
[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]If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.
A. increase the capacity of the coil
B. increase the superheat at the bulb
C. deliver more refrigerant to the coil
D. decrease the capacity of the coil
[单项选择]Reducing the clearance between a valve stem and rocker arm will result in the valve （）
A. having a shorter duration of opening
B. having a longer duration of opening
C. closing sooner
D. opening later
[单项选择]Valve gear knocks are more easily located while the engine （）.
A. is running
B. stops
C. is repaired
D. lacks of oil
[单项选择]This argument sounds reasonable, but （） it’s incorrect.
A. fortunately
B. actually
C. naturally
D. obviously
[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]Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
A. double bottom fuel oil tank temperature
B. heater supply steam flow
C. pressure of the fuel supplied to the burners
D. attemperator steam flow in the heater discharge circuit
[单项选择]Reducing free surfaces has the effect of lowering the（）.
A. uncorrected KG
B. virtual height of the center of gravity
C. metacenter
D. metacentric height
[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]The routing system which aimed at reducing the risk of casualties is called as（）.
A. traffic separation schemes
B. recommended tracks
C. precautionary areas
D. inshore traffic zones
[单项选择]Reducing the liquid free surfaces in a vessel reduces the（）.
A. roll period
B. metacentric height
C. waterplane area
D. vessel's draft
[单项选择]One method of reducing the length of radio transmissions without distorting the meaning of your words is by using（）.
A. slang
B. secret codes
C. procedure words
D. analogies
[单项选择]The Routing System which aimed at reducing the risk of casualties is called as（）.
A. Traffic Separation Schemes
B. Recommended tracks
C. Precautionary areas
D. Inshore traffic zones
[单项选择]Sub-cooling is a method of reducing the temperature of the liquid refrigerant below its （）.
A. freezing point
B. floc point
C. condensing temperature
D. compression temperature
