更多"The （）pump is usually used as the b"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]A centrifugal bilge pump requires priming （）.
A. primarily to lubricate the shaft seals
B. due to the inability of this type of pump to lift water to cover the suction (eye) of the impeller
C. to initially unload the pump by having its head pressure equal to discharge pressure
D. in order to overcome the potential energy of water in the discharge line
[单项选择]If an operating bilge pump is developing good vacuum, but is unable to discharge any water, which of the following problems is the most probable cause?（）
A. The wearing rings are excessively worn
B. The suction strainer is clogged
C. The discharge valve is clogged
D. The shaft is worn
[单项选择]The bilge pump on a fishing vessel（）.
A. must be fixed if the vessel exceeds 12 meters in length
B. may be used as a fire pump
C. must be portable if there are more than 4 watertight compartments
D. must be capable of pumping at least 450 gpm
[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]The （）pump is usually used as the emergency bilge pump.
A. turbine
B. screw
C. vane
D. ejector
[单项选择]If a bilge pump is able to develop vacuum, but is unable to sufficiently pump out the bilges, you would check for all of the following EXCEPT （）.
A. the circuit breaker
B. for leaks in the suction piping
C. relief valve is not properly seated
D. the suction strainer
[单项选择]The pump used to send the bilge water into the oily water separator（）the mixture because this might create finer oil particles.
A. should agitate
B. should not agitate
C. should mix up
D. should not add up
[单项选择]The （）pump is usually used as the lubricating oil pump.
A. turbine
B. screw
C. vaneejector
D. centrifugal
[单项选择]The lube oil pump used in a diesel engine is a （）.
A. volute pump
B. centrifugal pump
C. diaphragm pump
D. gear pump
[单项选择]The emergency bilge suction or bilge （） is used to prevent flooding of the ship.
A. injection valve
B. relief valve
C. discharge valve
D. inlet filter
[单项选择]A heavy，thick-walled tube，usually steel，used between the drill pipe and the bit in the drill stem to weight the bit in order to improve its performance is called a（）.
A. heavy-walled drill pipe
B. tool joint
C. down hole tool
D. drill collar
[单项选择]An axial piston, variable stroke pump is used in a vessels hydraulic steering gearUnder pressure, oil continually leaks out from between the valve plate/cylinder barrel and will（）.
A. cause loss of hydraulic oil from the system
B. result in extreme damage to the pump
C. cause damage to the pump ff not continually drained from the pump casing
D. result in the system high side pressure to substantially drop off
[单项选择]The expression FIRST MAGNITUDE is usually used to refer only to bodies of magnitude（）.
A. 1.5 and greater
B. 1.25 and greater
C. 1.0 and greater
D. 0.5 and greater
[单项选择]A smooth，tapered pin，usually of wood，used to open up the strands of a rope for splicing is called a(n)（）.
A. batten
B. bench hook
C. awl
D. fid
[单项选择]A smooth, tapered pin, usually of wood, used to open up the strands of a rope for splicing is called a (n)（）.
A. batten
B. bench hook
C. stabilizers
D. fid
[单项选择]If an emergency pump control is used as the emergency shutdown on a tank vessel，it must（）.
A. stop the flow of oil at the main deck manifold
B. prevent the oil from leaving the shore facility
C. prevent the oil from siphoning through the pump
D. None of the above
[单项选择]The plunger in the fuel injector pump, usually operated by a （）, is driven up and down when working.
A. crankshaft
B. camshaft
C. piston rod
D. rack and pinion
