A.precipitation number
B.neutralization number
C.pour point
D.demulsibility
您可能感興趣的試卷
你可能感興趣的試題
A.liquid strainer
B.refrigerant inlet of the condenser
C.inlet side of the evaporator
D.suction side of the compressor
A.Centrifugal
B.Gear
C.Propeller
D.Turbine
A.top of the piston and bottom side of head, with the piston at BDC
B.piston and head, including the space around the piston to the top of the upper ring and under the valves, with the piston at TDC
C.bottom of the piston and bottom side of the head at TDC, regardless of upper ring location and valve placement
D.top of the piston and bottom side of the head at TDC as compared to that which exists between the top of the piston and bottom side of head at BDC
A.the ability of oil to separate from water
B.the temperature at which oil flows rapidly
C.a measure of the water in a lube oil system
D.an emulsion of different grades of oil
A.CO2
B.Methyl chloride
C.R-22
D.Sulphur dioxide
最新試題
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）
The output volume of a positive fixed displacement pump can be changed only by （）.
Thermostatic expansion valves can be adjusted for （）.
When the steering gear is in operation, you should （）.
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
Low compressor head pressure in a refrigeration system can be caused by（）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）