更多"Adjustments to the compensating nee"的相关试题:
[单项选择]If the compensating needle valve of a hydraulic governor is opened more than necessary the governor will （）
A. have a larger than normal dead band
B. produce excessive speed response to a load change
C. respond slowly to any change in engine load
D. stabilize engine speed at the new governor setting
[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]The needle valve will open when the fuel pressure acting on the needle valve （） exerts a sufficient force to overcome the spring compression.
A. tape face
B. tapered face
C. surface
D. thinner face
[单项选择]If the needle valve in a fuel injection nozzle sticks open （）.
A. no fuel will be delivered through the nozzle
B. the nozzle will overheat and crack
C. time of injection will change
D. fuel will leak into the drain line
[单项选择]The needle valve in the injector （） at a pre-set pressure which ensures that the fuel will atomize once it enters the cylinder.
A. will lift
B. will be lifted
C. will close
D. will be closed
[单项选择]The function of synchronous compensating machine is to（）
A. improve power factor
B. reduce voltage oscillation
C. increase the insulation of circuits
D. eliminate regenerated magnetic fields
[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 purpose of the compensating adjustment used in a diesel engine hydraulic governor is to （）
A. compensate for low oil level
B. increase governor promptness
C. prevent governor hunting
D. limit engine load
[单项选择]Where is the cooling water from the compensating tank in the cooling water system of main engine lead to?（）
A. discharge side of the centrifugal pump
B. suction side of the centrifugal pump
C. the lowest point of the cooling water system
D. inlet of the main engine
[单项选择]Which of the following adjustments is always required whenever the diesel engine governor oil has been drained and renewed?（）
A. speed droop
B. compensation
C. idle speed setting
D. load limit control
[单项选择]Differential needle valves used in fuel injectors are directly closed by（）
A. cam action
B. spring force
C. fuel oil pressure
D. firing pressure
[单项选择]If the meter needle of the oxygen indicator cannot be set to zero，what should be done? （）
A. Replace the batteries
B. Check the sampling tube for blockage
C. Adjust the final reading by the amount the needle is displaced from zero
D. Replace the platinum filament
[单项选择]When the heat load begins to increase, the needle valve of an expansion valve will（）
A. move in an opening direction
B. move in a closing direction
C. either open or close
D. not move at all
[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
