更多"In （） pump a closed discharge valve"的相关试题:
[单项选择]In （） pumps a closed discharge valve will cause bursting discharge pressure.
A. centrifugal
B. plunger
C. injector
D. water
[单项选择]If the discharge valve is closed before the drive motor is stopped, which of the following types of pumps will most likely be damaged?（）
A. Centrifugal
B. Gear
C. Propeller
D. Turbine
[单项选择]The valve on the discharge side of a cargo pump on a tank vessel will usually be a（）.
A. butterfly valve
B. spectacle valve
C. check valve
D. globe valve
[单项选择]The discharge head of a centrifugal pump will vary directly with the （）.
A. change in impeller diameter
B. square of the impeller diameter
C. cube of the impeller diameter
D. impeller efficiency for large changes in the size of the impeller
[单项选择]The discharge side of every fire pump must be equipped with a（）.
A. gate valve
B. pressure gauge
C. check valve
D. strainer
[单项选择]The discharge flow of a reciprocating pump is （）.
A. steady
B. in pulsation
C. continuous
D. large
[单项选择]A relief valve for a cargo pump is generally installed（）.
A. after the discharge valve
B. between the pump and discharge valve
C. after the suction valve
D. between the pump and suction valve
[单项选择]The boiler feed pump discharge pressure is higher than the steam drum pressure to （）.
A. ensure feed water flow into the boiler
B. keep the steam drum pressure high
C. prevent water hammer in the feed line
D. help the feed water flash to steam
[单项选择]The pump discharge pressure will be considerably higher than the pressure at the （）.
A. pump entry branch
B. outlet pipe
C. impeller
D. None of the above is true
[单项选择]The major cause of fuel pump and injection system problems is （）
A. improper adjustments
B. contaminated fuel
C. kinked fuel lines
D. excessive engine vibration
[单项选择]ENG VALVE CLOSED指哪个活门（）
A. HMV
B. PRSOV
C. HPSOV
D. spar valve
[单项选择]An increase in the fuel injection pump discharge pressure can be caused by a/an （）
A. leaking delivery valve
B. excessive bearing end play
C. plugged injector spray hole
D. increased plunger stroke
[单项选择]When starting a centrifugal pump, the discharge valve should be （）.
A. closed
B. opened fully
C. cracked open
D. partly open
[单项选择]If a bilge pump failed to build up discharge pressure, you should check for （）.
A. excessive water in the bilges
B. a clogged suction strainer
C. oil in the bilges
D. All of the above
[单项选择]If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
A. a low load on the unit
B. a clogged pump suction strainer
C. a blockage in the line between the pump and hydraulic motor
D. the hydraulic motor turning too fast
[单项选择]ENG VALVE CLOSED灯熄灭，意味着（）
A. 活门开
B. 活门关
C. 活门在转换位
D. 活门故障
[单项选择]When start a screw pump, the by pass valve should be （）.
A. closed
B. opened fully
C. cracked open
D. partly open
[单项选择]If a hydraulic pump is overheating, the cause may be （）.
A. excessive internal leakage in the pump
B. low discharge pressure and fluid flow
C. excessive fluid level in the hydraulic reservoir
D. operation of the pump at 100% efficiency
