更多"Centrifugal pumps have what advanta"的相关试题:
[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]Corrosive liquids and acids should have what kind of label? （）
A. Skull and crossbones
B. Yellow
C. Red
D. White
[单项选择]Gear pumps are of positive displacement type pumps because they discharge a near constant amount of liquid （） pressure.
A. depending on
B. in relative to
C. regardless of
D. because of
[单项选择]What is an advantage of diesel over steam turbine propulsion? （）
A. Less fuel consumption per SHP
B. Diesel fuel costs less than bunker C or its equivalent
C. Less routine maintenance required
D. Less weight per SHP
[单项选择]What（）your registry port, over.
A. are
B. is
C. were
D. was
[单项选择]What form should the master hand over to the Customs Officer at the port of arrival（）.
A. Last Port Clearance
B. Declaration of Crew's Baggages
C. Maritime Declaration of Health
D. List of Bonded Stores
[单项选择]When we have agreed broadly on what should be said, the secretary will produce a preliminary （）for the committee's approval.
A. project
B. design
C. draft
D. drawing
[单项选择]What we have done is far from（）
A. satisfactory
B. satisfied
C. satisfaction
D. satisfy
[单项选择]What is an advantage of a steam turbine over a diesel for the main propulsion?（）
A. Faster response from ahead to astern
B. Less fuel consumption
C. Cheaper initial installation cost
D. Less weight per unit of horsepower
[单项选择]What is the best way of stopping an over-speeding diesel engine?（）
A. Disconnect the battery cables from the starting motor
B. Drain the hydraulic fluid from the governor sump
C. Block the flow of cooling air to the radiator
D. Secure the fuel supply and block the air intake
[单项选择]What（）of blood does Tom have?
A. kind
B. type
C. sort
D. category
[单项选择]What should you do if you have transmitted a distress call a number of times on channel 16 and have received no reply?（）
A. Repeat the message using any other channel on which you might attract attention
B. Key the microphone several times before transmitting again
C. Turn up the volume on the receiver before transmitting again
D. Report the problem to the head electrician
[单项选择]
下列（）方法可以证明自已的身份。
1.What you know？
2.What you have？
3.Who you are？
A. 1，2，3
B. 2，3
C. 1，2
D. 1，3
[单项选择]What would have the greatest affect on a vessel’s longitudinal strength? （）
A. Collision damage to the bow，forward of the collision bulkhead
B. Grounding damage to the bilge strake，just aft of midships
C. Extensive corrosion to the centerline deck plating
D. Damage to the side shell，midway between the bilge and the stringer plate
[单项选择]What is/are the advantage（s）of cranes over conventional cargo booms（）.
A. Cranes are able to pick up and drop loads over a greater spotting area
B. Increased safety because the deck is clear of running and standing rigging
C. Simplicity of operation of the crane by its operator
D. All of the above
[单项选择]What a beautiful dress you have on today!（）
A. It is suitable for me.
B. No, it isn't.
C. You want to have one, too?
D. Thank you
[单项选择]What could have（）her （）this state of despair?
A. brought；to
B. brought；on
C. brought；about
D. brought；forward
[单项选择]What would you like to have, meat or fish?（）
A. Either will do
B. Yes, I like meat
C. Yes, I like fish
D. No, they are not my favorite
[单项选择]Tom, what did you do with my documents? I have never seen such a（）and disorder!
A. mass
B. mess
C. guess
D. bus
