更多"If a centrifugal pump were continua"的相关试题:
[单项选择]If a centrifugal bilge pump were continually operated with the discharge valve closed the （）.
A. motor overload would open
B. relief valve would open
C. pump would eventually overheat
D. motor would overheat
[单项选择]The advantage of a centrifugal pump as compared with a reciprocating pump is that （）.
A. discharge is continuous
B. it has no internal valves
C. upon accidental closing of discharge valve, excessive pressure will not build up
D. all of the above are true
[单项选择]The injector pump is operated by a cam which drives （） up and down.
A. the needle valve
B. the plunger
C. the piston
D. the cylinder
[单项选择]A spur gear pump should be operated with the discharge valves （）.
A. slightly opened
B. throttled
C. fully opened
D. halfway opened
[单项选择]The fuel injector pump is operated by （） which drives the plunger up and down.
A. a separate motor
B. a cam
C. a generator
D. a chain
[单项选择]If a diesel engine were running at 20% overload with a smoky exhaust, you should（）
A. stop the engine immediately to prevent damage
B. increase lube oil pressure
C. slow the engine allowing it to gradually cool
D. decrease the cooling water it temperature to the water jacket
[单项选择]Two men were（）a large log over the rough ground with the help of a rope.
A. pushing
B. drawing
C. dragging
D. carrying
[单项选择]Which pump is the self-priming pump?（）
A. turbine
B. centrifugal
C. ejector
D. mixed flow
[单项选择]The （）pump is usually used as the bilge feed pump to an oily water separator.
A. turbine
B. screw
C. vane
D. ejector
[单项选择]A （） pump is that where the volume of the pump chamber is alternately increased to draw the liquid in and then decreased to force the liquid out.
A. injector
B. positive displacement
C. centrifugal
D. centripetal
[单项选择]A mixed-flow pump is a （） pump classified by the working principle.
A. self priming
B. positive displacement
C. reciprocating
D. impeller
[单项选择]Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
A. increasing the volume of intake air
B. shutting off the fuel supply
C. increasing the engine back pressure
D. over-speeding the engine
[单项选择]Recharging a previously used cartridge-operated dry-chemical extinguisher is accomplished by（）.
A. authorized fire equipment servicing personnel only
B. replacing the propellent cartridge and refilling with powder
C. puncturing the cartridge seal after installation
D. recharging the cartridge and refilling it with powder
[单项选择]On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
A. hydraulic
B. electric
C. steam
D. diesel
[单项选择]总分配系数d=Σwi*Kdi中，Wi为（）。
A. 矿物数
B. 矿物中元素的分配系数
C. 每种矿物在集合体中所占的重量百分数
D. 矿物种类
[判断题]脑结核球钙化在T1WI和T2WI均为高信号。
[判断题]蛛网膜囊肿在T1WI呈高信号，T2WI呈高信号。
