A.gravity and feed oil cups
B.grease cups
C.hand during installation
D.leakage through the stuffing box
您可能感兴趣的试卷
你可能感兴趣的试题
A.a needle gun
B.soap and water
C.a wire brush
D.a chipping hammer
A.Hydrochloric acid
B.Chlorine
C.Sulfuric acid
D.Zinc chromate
A.absolute humidity
B.relative humidity
C.specific humidity
D.total humidity
A.excessive pump speed
B.excessive suction head
C.worn wearing rings
D.gross pump misalignment
A.Distillation is the process of boiling seawater to produce vapor which is condensed into fresh water
B.Evaporation is the second part of the distillation process where brine is removed
C.Brine is the result of condensed sea water vapor
D.Distillate is the product resulting from the evaporation of fresh water vapor
A.absolute humidity
B.specific humidity
C.effective humidity
D.relative humidity
A.drain water from the air receiver
B.drain water from the cylinders
C.delay the compression process until the motor is up to speed
D.check pump alignment
A.face shield
B.a respirator
C.rubber gloves
D.an all purpose gas mask
A.lantern rings
B.bearings
C.easing volutes
D.wearing rings
A.packing gland
B.mechanical seals
C.lantern rings
D.wearing rings
最新试题
If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should ().
The rate of heat transfer from a hot region to a cold region is affected most by the ().
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will ().
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?()
A salinity indicator is used to determine the ().
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by ().
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?()
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will ().
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?()
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump ().