更多"Which of the following components a"的相关试题:
[单项选择]Which of the following centrifugal pump components converts the liquid kinetic energy of velocity to the potential energy of pressure?（）
A. Impeller
B. Electric motor
C. Volute
D. Eye
[单项选择]Which of the following methods is used to prevent throttling of compressed air through the diesel engine air starting valves?（）
A. Holding the valve open for a long period
B. Increasing the starting air pressure used
C. Opening the stating air valve quickly
D. Reducing the starting air valve size
[单项选择]Which of the following components provides a direct source of seawater for the fire main system?（）
A. Rose box
B. Sea chest or spool piece
C. Sluice valve
D. Fire pump stuffing box
[单项选择]Which of the following terms is used to identify the pressure of the liquid entering a pump?（）
A. Suction head
B. Pump head
C. Discharge head
D. Total head
[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 can be used in hydraulic transmission system?（）
A. Hydraulic oil
B. Animal oil
C. Light oil
D. Fuel oil
[单项选择]Which of the following tensioning devices is used with webbing to secure light vehicles aboard Ro-Ro vessels（）.
A. Chain lever
B. Buckle tensioner
C. Adjust-a-matic tensioner
D. Turnbuckle
[单项选择]
Which of the following are components of a mechanical seal? （）
(1) stationary ring
(2) rotational ring
(3) packing
(4)spring
A. (1), (2) and (3)
B. (1), (2) and (4)
C. (2), (3) and (4)
D. None of the above
[单项选择]Which of the following definitions can be used to define the term ‘offset ’ as a characteristic of controller action?（）
A. The period of time in which the set point and the control point coincide
B. The periodic change between the set point and the control point
C. The variable difference between the set point and the control point
D. The constant difference between the set point and the control point
[单项选择]Which of the following methods is normally used to control the temperature of air distributed from individual cooling coils in an air conditioning system using a chilled water circulation system?（）
A. A room thermostat activates an electric heater at each individual chilled air outlet when necessary
B. Varying the number of passes the air makes across the coils
C. Varying the temperature of the water through the coils
D. Varying the quantity of water flowing through the coils
[单项选择]Which of the following chemicals will be used where protection against caustic cracking is required in boiler treatment?（）
A. Sodium hydroxide
B. Sodium carbonate
C. Sodium nitrate
D. Sodium polyphosphate
[单项选择]Which of the following methods might be used as the treatment on emulsified oil?（）
A. gravity separation
B. centrifuge
C. Cyclone
D. Cross-flow membrane filtration
[单项选择]Which of the following equipment can not be used for the waste heat recovery of the M/E to further improve its thermal efficiency?（）
A. M/E turbocharger
B. exhaust gas boiler
C. incinerator
D. fresh water generator
[单项选择]Which of the following firing order may be used for an 6 cylinder engine?（）
A. 1-2-3-4-5-6
B. 1-2-3-6-5-4
C. 1-5-3-6-2-4
D. 1-3-4-5-6-2
[单项选择]The purpose of a preventer as it is used on a conventional yard and stay cargo rig is to（）.
A. allow greater than normal loads to be handled by the gear
B. act as an inboard guy in the event the inboard guy parts during cargo handling
C. assist the outboard guy in supporting stresses during cargo handling
D. prevent the inboard guy from parting due to stresses during cargo handling
[单项选择]The major components which determine the length of catenary in a deployed anchor cable are water depth，cable tension，and（）.
A. environmental forces
B. bottom conditions
C. cable weight
D. water density
[单项选择]Which of following is used to periodically multicast by DIS on a LAN to ensure IS-IS link state databaseaccuracy？（）
A. LSP
B. PSNP
C. ISH
D. CSNP
E. IIH
