更多"Which of the following pumps belong"的相关试题:
[单项选择]Which of the following pumps belongs to centrifugal pump?()
A. Piston pump
B. Screw pump
C. Diffuser pump
D. Water-ring pump
[单项选择]Which of the following types of hydraulic pumps would be used in a steering system?()
A. Lobe
B. Screw
C. Radial piston
D. Volute
[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]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]
Which of the following pumps will build up a bursting pressure or stall their motors if the discharge valves are closed?()
(1) gear
(2) centrifugal
(3) screw
A. (1)and(2)
B. (1),(2)and(3)
C. (1)and(3)
D. (2)and(3)
[单项选择]Which of the following marine examples belongs to the open loop control system?()
A. Accommodation heating system
B. Steering gear
C. Boiler control
D. Cargo control
[单项选择]
Which of the following pumps are self-priming, and can deal with liquid from a level below the pump? ()
(1) reciprocating
(2) rotary
(3) centrifugal
A. (1)only
B. (1)and (2)
C. (1),(2)and(3)
D. (2)and(3)
[单项选择]As to the bearing, of the following, which statement is not true?()
A. ff overheat is found, the engine must be stopped for inspection
B. Much heat of the crankcase door indicates that the bearing is overheated
C. If bearing clearance is too large, knocking will be heard in the crankcase
D. If bearing clearance is too large or too small, the white metal may be melted
[单项选择]As to the piston cooling, of the following, which statement is not true?()
A. Because the piston is exposed to very high temperature, it must be cooled
B. The lower the piston cooling temperature is, the better it is
C. Both water and lube oil can be used as coolant
D. One of the piston cooling methods is vibration cooling, with better effect
[单项选择]Which of the listed pumps is NOT a positive displacement pump?()
A. Centrifugal
B. Reciprocating
C. Gear
D. Rotary
[单项选择]Which of the following is not a factor which can interfere with the pulse of sound and cause a variation the depth reading?()
A. salinity
B. temperature
C. the hydrostatic pressure
D. Vessel’s speed
[单项选择]Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?()
A. Distress messages should first be transmitted on 2182 kHz
B. Channel 16 (156.8 MHz) may be used for distress messages
C. If no answer is received on the designated distress frequencies,repeat the distress call on any frequency available
D. It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds duration
[单项选择]Which of the following machinery space operations is required to be logged in the Oil Record Book?()
A. Ballasting or cleaning of fuel oil tanks
B. Shifting suction of main fuel pump to reserve fuel oil tank
C. Changing out sprayer plates to adjust for steam demand
D. Daily inspection of engine room bilges
[单项选择]Which of the following nondestructive testing methods can be used to detect a suspected subsurface defect in a tail-shaft liner?()
A. Dye penetrant
B. Magnetic particle
C. Ultrasonic
D. All of the above