更多"A spur gear pump should be operated"的相关试题:
[单项选择]The control rod of a steering gear pump is attached at its outer end to （）.
A. the hunting gear
B. the rudder stock
C. the rudder controller
D. the feedback unit
[单项选择]An advantage of a helical gear pump over a simple gear pump is that the helical gear pump is capable of （）.
A. maintaining a steadier speed
B. delivering liquids over greater distances
C. operating for longer periods of time
D. producing a smoother discharge flow
[单项选择]The amount of fluid delivered by a gear pump can be regulated by （）.
A. throttling the pressure line
B. changing the speed of the rotor
C. either A or B
D. None of the above is true
[单项选择]A gear pump belongs to （） according to its working principle.
A. reciprocating pumps
B. positive displacement pumps
C. centrifugal pumps
D. centripetal pumps
[单项选择]Most pump manufacturers recommended that the discharge piping for centrifugal pumps be （）.
A. one size larger than the pump discharge nozzle
B. the same size as the pump discharge nozzle
C. one size smaller than the pump discharge nozzle
D. installed with a short radius elbow at the pump
[单项选择]The ship should be operated by a company which is issued a(an)（）relevant to ship.
A. ISM
B. DOC
C. SMC
D. PSC
[单项选择]Line throwing equipment should not be operated（）.
A. during a rain storm
B. in an explosive atmosphere
C. near a lifeboat station
D. by other than licensed officers
[单项选择]A diesel engine should not be operated at low loads for long periods of time because（）
A. heavy carbon deposits will buildup on the valves and in the exhaust
B. fuel dilution is increased at low load
C. exhaust valves may be damaged
D. all of the above
[单项选择]On a ship，watertight doors should be operated（）.
A. during abandon drill
B. during fire drill
C. weekly
D. when the rig is being moved
[单项选择]When distilling salt water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.
A. to cut down the amount of cooling water needed
B. to prevent an excess amount of cooling water from being discharged to the bilges
C. to supply hot water to the evaporator for more economical operation
D. None of the above is tree
[单项选择]You detect oil around your tank vessel while discharging. The first thing to do is（）.
A. try to find out where the oil is coming from
B. call the master
C. have the pumpman check the discharge piping
D. shut down operations
[单项选择]Where the Shipowner has accepted the port of discharge named by the Charterer，he must go there although it is not prospectively safe，and claim damages for injury（）the ship by reason of the port not being safe.
A. by
B. on
C. to
D. in
[单项选择]The soda-acid portable extinguishers must be discharged and refilled （）.
A. every six months
B. every year
C. every one and half year
D. every two years
[单项选择]Both the Shipowner and the Charterer will be discharged from their obligations under the charter-party if it（）frustrated.
A. provides
B. becomes
C. contains
D. comes
[单项选择]A vessel puts into the port of Kobe，Japan to discharge cargo. While awaiting completion of the cargo operation，the vessel contracts with a local shipyard to have the hull chipped，scaled，and painted. How is the cost of this maintenance handled with the Collector of Customs?（）
A. A declaration is required and duty is involved on the total cost
B. No declaration is required since this is considered routine maintenance
C. A declaration is made and duty is charged on the materials only
D. A declaration is made，but duty is charged on the labor only
