更多"Hydraulic pumps most commonly used "的相关试题:
[单项选择]When fire pumps are used for other than firefighting service，each pipe connecting the other service (except for branch lines used for deck washing) must have a（）.
A. check valve installed in the line
B. shut off valve at a manifold near the pump
C. quick disconnect union within ten feet of the pump
D. regulator in the line set at 125 psi
[单项选择]Strainers are commonly used in hydraulic systems to （）.
A. protect the pump from fine soluble contaminants
B. prevent solid particles from entering the pump
C. prevent solid particles from entering the filter
D. protect the directional control valves
[单项选择]Which of the following pumps is used where a relatively high pressure and small capacity are required?（）
A. Volute pump
B. Diffuser pump
C. Regenerative pump
D. All of the above
[单项选择]（） are commonly used in mechanical-hydraulic governor（调速器） to sense engine speeds.
A. Bulbs
B. Bulks
C. Flyweights
D. Flywheels
[单项选择]Hydraulic machinery failures are commonly caused by misalignment of the system components and by （）.
A. hydraulic fluid contamination
B. excessive fluid friction
C. turbulent fluid flow
D. fluid pressure surges
[单项选择]Multiple fire pumps may be used for other purposes provided that one pump is（）.
A. on line to the fire main
B. kept available for use on the fire main at all times
C. capable of being connected to the fire main
D. rated at or above 125 psi
[单项选择]Which of the following pumps will most affect oily water separator performance and give the worst result?（）
A. reciprocating pump
B. vane pump
C. screw pump
D. centrifugal pump
[单项选择]Which of the following pumps is most suitable for an oily water separator?（）
A. reciprocating pump
B. vane pump
C. mono pump
D. axial-flow pump
[单项选择]Most hydraulic steering gears are fitted with relief valves which（）
A. function when the rudder is amidships
B. relieve excess whip pressure from the hydraulic oil system
C. protect the piping assembly from external rudder shock
D. relieve excessive telemotor pressure
[单项选择]In most pumps and pump motors overpacking the ball bearings full of grease will result in （）
A. moisture emulsification of the bearing grease
B. insufficient circulation and overheating of the bearing
C. proper grease circulation to cool the bearing
D. sliding friction between balls and races
[单项选择]The star formation is most commonly used and requires（） on the alternator.
A. one slip-ring
B. two sliprings
C. three sliprings
D. four sliprings
[单项选择]What type of electric motor is most commonly used on board ship?（）
A. non-synchronous electric motor
B. synchronous electric motor
C. fully enclosed electric motor
D. watertight electric motor
[单项选择]Bourdon Tube is probably the most commonly used （） measuring instrument.
A. the absolute pressure
B. the gauge pressure
C. the vacuum pressure
D. the differential pressure
[单项选择]The type of gauge most commonly used to measure pressure is the （）.
A. bimetallic type
B. diaphragm type
C. bourdon tube type
D. resistance-temperature type
[单项选择]The most common instrument used to measure diesel engine exhaust pressure is the （）
A. pyrometer
B. bourdon gauge
C. pneumercator
D. manometer
[单项选择]The two most common gases used in pneumatic system are （）
A. compressed air and nitrogen
B. helium and nitrogen
C. oxygen and hydrogen
D. oxygen and acetylene
[单项选择]A high cube container would most likely be used to stow（）.
A. dense bulk cargoes
B. household appliances
C. fragile cargoes
D. heavy industrial machinery
[单项选择]Which arrangement of shell plating is used most in modern shipbuilding（）.
A. Clinker
B. Flush
C. In-and-Out
D. Joggled
