更多"Which of the following types of hyd"的相关试题:
[单项选择]Which of the following hydraulic systems is not one of the three sub-division of the Hydraulic drive system?（）
A. Constant pressure system
B. Variable pressure system
C. Variable displacement system
D. Constant volume system
[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 types of portable fire extinguishers are designed for use on electrical fires?（）
A. Dry chemical and carbon dioxide
B. Foam (stored pressure) and soda-acid
C. Carbon dioxide and foam (stored pressure)
D. Dry chemical and soda-acid
[单项选择]Which types of portable extinguisher should you watch for the reflash of the fire?（）
A. foam and water
B. CO2 and dry chemical
C. dry chemical and water
D. foam and CO2
[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 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 listed pumps is NOT a positive displacement pump?（）
A. Centrifugal
B. Reciprocating
C. Gear
D. Rotary
[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]Which of the listed types steam traps operates on the principle that hot water flashes to steam when its vapor pressure is rapidly reduced?（）
A. Ball float
B. Thermostatic
C. Bimetallic
D. Impulse
[单项选择]Which of the listed types of starting systems is often used on large, low-speed, direct reversing, main propulsion diesel engines?（）
A. Electric
B. Hydraulic
C. Air
D. All of the above
[单项选择]Which of the following types of motors is often designed for use in correcting power factor?（）
A. Polyphase
B. Wound-rotor
C. Induction
D. Synchronous
