A.in motion, providing a null input
B.not in motion, thus providing a null input
C.in motion, providing an input to place the main pump on maximum stroke
D.in motion, providing an input to place the main pump at null stroke
您可能感興趣的試卷
你可能感興趣的試題
A.regulating the ratio between torque and speed via the torque limiter at the motor
B.directing the motor output flow through a bypass line
C.maintaining a constant flow and pressure input
D.controlling the input flow rate
A.the temperature of the hydraulic fluid
B.the flow rate of the hydraulic fluid
C.the temperature of the cooling water
D.all of the above
A.regulate the fluid flow in either direction
B.restrict movement of hydraulic fluid in one direction, but allow free movement in the other direction
C.allow free movement of hydraulic fluid in both directions
D.allow a restricted fluid flow in one direction only
A.adding small amounts of oil to the system
B.the system has been overheated
C.the system has been drained and then filled with new oil
D.the system has been idle for a long period of time
A.permanent loss of pump suction
B.worn shaft seals
C.high level in the oil sump
D.low motor RPM
最新試題
Cold weather starting of a diesel engine may be made easier by（）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
Flame failure in an automatically fired auxiliary boiler can from a/an （）
Using a file without a handle may result in （）
The condensers located in various stages of a flash evaporator are cooled by（）
The ISPS Code consists of a mandatory section-Part A, which shows（）
If separating effect is not good, which measure should be taken （）
The cetane rating of diesel fuel is an indication of the （）