A.insufficient load
B.excessively high oil viscosity
C.relief-valve pressure setting too high
D.reservoir level being maintained two inches above normal
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A.a defective or broken high pressure un-loader
B.a loose valve plate
C.excessive overload
D.no compression
A.regulating the oil flow with the six-way valve
B.moving the automatic differential valve
C.moving the receiving tele-motor which regulates the two-way valve
D.varying the angle of a tilting box or eccentricity of a floating ring
A.Pour point
B.Cloud point
C.Vacuum
D.Pressure
A.set for maximum torque
B.on the purge and vent stroke
C.in the neutral position
D.rotating backwards
A.frames
B.joiners
C.longitudinals
D.knees
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The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
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Which of the following statements is correct concerning heat transfer?（）
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When the steering gear is in operation, you should （）.
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.