单项选择题
A.permanent loss of pump suction B.worn shaft seals C.high level in the oil sump D.low motor RPM
Air trapped in the hydraulic fluid of a steering system...
单项选择题Air trapped in the hydraulic fluid of a steering system would be indicated by（）
A.an improper rudder response B.hammering noises in the equipment or transmission lines C.popping or sputtering noises D.all the above
How can the chance of contaminating hydraulic fluid be ...
单项选择题How can the chance of contaminating hydraulic fluid be decreased when working on hydraulic system?（）
A.clean the fittings before they are disconnected B.Place drip pans under leaky fittings C.Seal any cracks in lines with Permatex D.Coat all threads with graphite oil
In the design of hydraulic piping and equipment conside...
单项选择题In the design of hydraulic piping and equipment consideration is given to minimize turbulence in the hydraulic fluid, as this will cause（）
A.molecular fluid vibration B.energy losses C.wide pressure variations D.mechanical damage to control valves
